• DAY3SVR: Nws Storm Prediction Center Norman Ok

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Jan 9 19:12:42 2026
    ACUS03 KWNS 091912
    SWODY3
    SPC AC 091911

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0111 PM CST Fri Jan 09 2026

    Valid 111200Z - 121200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected across the U.S. on Sunday.

    ...Discussion...
    An amplified midlevel trough will advance eastward across the
    Northeast and Mid-Atlantic through the period. Strong forcing for
    ascent and steepening deep-layer lapse rates preceding the trough
    could result in an isolated lightning flash with low-topped
    convection overspreading the Mid-Atlantic. However, low confidence
    in this scenario and expected limited coverage precludes a TSTM area
    at this time. Upstream, an expansive cool/dry air mass will limit
    thunderstorm potential across the CONUS.

    ..Weinman.. 01/09/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jan 10 08:26:45 2026
    ACUS03 KWNS 100826
    SWODY3
    SPC AC 100825

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0225 AM CST Sat Jan 10 2026

    Valid 121200Z - 131200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected across the U.S. on Monday and Monday
    night.

    ...DISCUSSION...
    A large-scale upper-level trough will remain over the eastern U.S.
    on Monday, as a mid-level shortwave trough moves southeastward into
    the north-central states Monday night. At the surface, an area of
    high pressure will remain anchored over the Gulf Coast states on
    Monday, as a cool and dry airmass remains in place over much of the
    continental U.S. For this reason, thunderstorms are not expected to
    develop over the nation Monday or Monday night.

    ..Broyles.. 01/10/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jan 10 19:26:49 2026
    ACUS03 KWNS 101926
    SWODY3
    SPC AC 101925

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0125 PM CST Sat Jan 10 2026

    Valid 121200Z - 131200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorm potential appears low on Monday.

    ...Synopsis...
    Dry and stable conditions will generally preclude thunderstorm
    development across the CONUS on Monday. A vigorous mid/upper
    shortwave trough is forecast to move southeast across the northern
    Plains and Upper Midwest. Farther south, an upper low is forecast to
    move northeast across northern Mexico, and begin to influence parts
    of southwest TX. Weak convective showers may accompany both of
    these systems, but very meager and shallow elevated buoyancy is
    expected to limit lightning potential.

    ..Dean.. 01/10/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jan 11 08:30:21 2026
    ACUS03 KWNS 110830
    SWODY3
    SPC AC 110829

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0229 AM CST Sun Jan 11 2026

    Valid 131200Z - 141200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not forecast to develop across the U.S. on Tuesday
    and Tuesday night.

    ...DISCUSSION...
    A large-scale upper-level trough will dig southeastward into the
    east-central U.S. on Tuesday, as an associated surface low deepens
    across the Great Lakes. In response, a cold front will move
    southeastward across the central U.S. This will reinforce cold and
    dry conditions over most of the nation. For this reason,
    thunderstorm development is not expected over the continental U.S.
    Tuesday and Tuesday night.

    ..Broyles.. 01/11/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jan 11 18:52:55 2026
    ACUS03 KWNS 111852
    SWODY3
    SPC AC 111851

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1251 PM CST Sun Jan 11 2026

    Valid 131200Z - 141200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorm potential appears low on Tuesday.

    ...Synopsis...
    Generally dry and stable conditions are expected to limit
    thunderstorm potential across the CONUS on Tuesday. A large-scale
    upper trough is forecast to amplify across the central/eastern
    CONUS. An embedded shortwave trough and attendant surface low are
    forecast to move across the Great Lakes vicinity, while a weak upper
    low initially near southwest TX is expected to evolve into a
    low-amplitude shortwave trough and move eastward across the Gulf
    Coast region.

    A persistent surface ridge over the Gulf will inhibit moisture
    return and destabilization within the warm sector of the surface low
    moving across the Great Lakes. Modest low-level moisture and weak
    buoyancy may reside across parts of south FL and the Keys for much
    of the period. However, weak forcing and poor lapse rates will tend
    to inhibit deep convection, with any appreciable thunderstorm
    potential currently expected to remain offshore.

    ..Dean.. 01/11/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Jan 12 08:25:57 2026
    ACUS03 KWNS 120825
    SWODY3
    SPC AC 120825

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0225 AM CST Mon Jan 12 2026

    Valid 141200Z - 151200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    No thunderstorms are forecast across the U.S. on Wednesday and
    Wednesday night.

    ...DISCUSSION...
    A large-scale upper-level trough will dig southeastward into the
    east-central U.S. on Wednesday, as a cold front moves southeastward
    into the Appalachians. A large area of high pressure will settle
    into the Great Plains and Mississippi Valley, reinforcing a cool and
    dry airmass across the region. For this reason, thunderstorms are
    not expected on Wednesday and Wednesday night across the continental
    U.S.

    ..Broyles.. 01/12/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Jan 12 19:12:00 2026
    ACUS03 KWNS 121911
    SWODY3
    SPC AC 121910

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0110 PM CST Mon Jan 12 2026

    Valid 141200Z - 151200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorm potential appears low on Wednesday.

    ...Synopsis...
    A deep upper trough will remain in place across the central/eastern
    CONUS on Wednesday. Within the large-scale trough, embedded
    shortwave troughs will move through parts of the Midwest/Great
    Lakes, central Gulf Coast/Southeast, and the Florida Peninsula. A
    surface low initially over Quebec will move quickly northeastward,
    with new surface low development expected near southern New England
    later in the period, and frontal wave development possible offshore
    of the Atlantic Seaboard. A reinforcing cold front will move through
    much of the central/eastern CONUS through the period.

    With the exception of south FL, prefrontal moisture return is
    expected to be too meager for appreciable destabilization. Across
    south FL, weak buoyancy may be in place Wednesday morning, but most
    guidance suggests that thunderstorm potential will largely be
    offshore by the start of the period (12Z Wednesday morning). Late in
    the period, weak convection associated with the approaching
    shortwave trough and cold front may affect parts of the FL
    Peninsula, but forecast buoyancy by late Wednesday night/early
    Thursday morning appears too weak/shallow for appreciable
    thunderstorm potential.

    ..Dean.. 01/12/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jan 13 08:27:35 2026
    ACUS03 KWNS 130827
    SWODY3
    SPC AC 130826

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0226 AM CST Tue Jan 13 2026

    Valid 151200Z - 161200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not forecast across the U.S. on Thursday and
    Thursday night.

    ...DISCUSSION...
    A large-scale upper-level trough will move eastward to the southern
    Atlantic Seaboard on Thursday, as northwest flow remains in place
    over much of the nation. At the surface, a large area of high
    pressure will remain over the east-central U.S. As a result, dry and
    cool conditions will be unfavorable for thunderstorms over the
    continental U.S. Thursday and Thursday night.

    ..Broyles.. 01/13/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jan 13 19:05:37 2026
    ACUS03 KWNS 131905
    SWODY3
    SPC AC 131904

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0104 PM CST Tue Jan 13 2026

    Valid 151200Z - 161200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Isolated thunderstorms are possible across far southern Florida and
    the Keys on Thursday.

    ...Southern FL and the Keys...
    A robust midlevel trough will advance eastward across the Southeast
    into the western Atlantic during the day, while a related cold front
    moves southeastward across far southern FL and the Keys. While
    buoyancy will be limited, frontal convergence and at least modest
    midlevel height falls should support isolated thunderstorms during
    the morning and afternoon. Despite ample deep-layer shear, the weak
    buoyancy should tend to limit updraft strength and related severe
    potential.

    ..Weinman.. 01/13/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 14 07:46:40 2026
    ACUS03 KWNS 140746
    SWODY3
    SPC AC 140745

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0145 AM CST Wed Jan 14 2026

    Valid 161200Z - 171200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    No thunderstorms are anticipated across the US on Friday.

    A large upper trough will dominate the weather across the
    central/eastern United States on Day3 (Friday), with an upper ridge
    along the west coast. Model guidance suggests that low-level
    moisture will be quite limited,resulting in generally stable
    conditions. Therefore, no thunderstorms are expected.

    ..Hart.. 01/14/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 14 19:11:13 2026
    ACUS03 KWNS 141911
    SWODY3
    SPC AC 141910

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0110 PM CST Wed Jan 14 2026

    Valid 161200Z - 171200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    No thunderstorms are anticipated across the US on Friday.

    ...Discussion...
    An expansive midlevel trough will encompass the eastern two-thirds
    of the CONUS, while an amplified upper ridge persists over the West.
    This pattern will result in cool/dry/stable conditions, and
    therefore, no thunderstorms are expected.

    ..Weinman.. 01/14/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Jan 15 07:42:16 2026
    ACUS03 KWNS 150742
    SWODY3
    SPC AC 150741

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0141 AM CST Thu Jan 15 2026

    Valid 171200Z - 181200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    No severe thunderstorms are expected on Saturday.

    A broad upper trough will prevail across most of the CONUS on
    Saturday, with dry/stable conditions inhibiting thunderstorms in
    most areas. A few afternoon storms are possible over south FL, but
    weak CAPE and limited vertical shear should preclude severe storms.

    ..Hart.. 01/15/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Jan 15 19:02:20 2026
    ACUS03 KWNS 151902
    SWODY3
    SPC AC 151901

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0101 PM CST Thu Jan 15 2026

    Valid 171200Z - 181200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    No severe thunderstorms are expected on Saturday.

    ...Southeast FL and the Keys...
    A broad large-scale trough will amplify over the eastern half of the
    CONUS through the period. In response, a weak warm front/surface
    wave and attendant moisture will overspread southeastern FL during
    the overnight hours. Related destabilization will support isolated thunderstorms along the immediate coastal areas and the Keys. Modest strengthening of low/deep-layer shear within the weak warm-advection
    regime may favor an isolated strong storm or two, though the
    stronger activity should generally remain offshore.

    ..Weinman.. 01/15/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Jan 16 07:06:24 2026
    ACUS03 KWNS 160706
    SWODY3
    SPC AC 160705

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0105 AM CST Fri Jan 16 2026

    Valid 181200Z - 191200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Severe thunderstorms are not expected on Sunday.

    ...Synopsis...

    An upper trough will move across the eastern U.S. through Sunday
    evening. Thereafter, broad upper troughing will persist across much
    of the CONUS east of the Rockies. At the surface, a cold front will
    develop southeast across the FL Peninsula through afternoon.
    Sufficient boundary layer moisture will be present to support weak
    buoyancy. Large-scale ascent associated with the approaching upper
    trough, and along the surface front, may support isolated
    thunderstorm activity across portions of the Keys into the southeast
    FL Peninsula during the morning and afternoon before the cold front
    moves offshore. Severe storms are not expected.

    ..Leitman.. 01/16/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Jan 16 19:13:29 2026
    ACUS03 KWNS 161913
    SWODY3
    SPC AC 161912

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0112 PM CST Fri Jan 16 2026

    Valid 181200Z - 191200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Severe thunderstorms are not expected on Sunday.

    ...Southeastern Florida...
    An amplified midlevel trough will move across the eastern CONUS
    through Sunday evening. The tail-end of a related cold front will
    cross the southern FL Peninsula during the afternoon hours.
    Along/ahead of the front, sufficient boundary-layer moisture and
    buoyancy will support isolated thunderstorms before the front moves
    offshore. While moderate deep-layer shear would be sufficient for a
    strong storm or two along coastal areas of southeastern FL and the
    Upper Keys, current thinking is that limited buoyancy and quickly
    veering low-level flow will limit strong-storm potential over land
    areas.

    ..Weinman.. 01/16/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jan 17 07:46:33 2026
    ACUS03 KWNS 170746
    SWODY3
    SPC AC 170745

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0145 AM CST Sat Jan 17 2026

    Valid 191200Z - 201200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected on Monday.

    ...Synopsis...

    Surface high pressure will spread across much of the CONUS on Monday
    behind a prior cold frontal passage. Continental trajectories will
    keep Gulf moisture cut-off, and a cold/stable airmass will preclude thunderstorm activity.

    ..Leitman.. 01/17/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jan 17 19:06:04 2026
    ACUS03 KWNS 171906
    SWODY3
    SPC AC 171905

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0105 PM CST Sat Jan 17 2026

    Valid 191200Z - 201200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected on Monday.

    ...Synopsis...
    Thunderstorm potential appears negligible across the country for
    Monday. An extensive cold/dry continental air mass and building
    surface high pressure over the central CONUS will promote dry
    conditions for most regions east of the Rockies. Broad-scale upper
    ridging will persist along the West Coast, maintaining low chances
    for precipitation. A lightning flash or two appears plausible on the
    eastern shores of the lower Great Lakes where cold 850-700 mb
    temperatures may support mixed-phase hydrometeors within deep
    lake-effect snow bands. However, this potential seems too spatially
    limited and conditional to warrant broader 10% thunder probabilities
    at this time.

    ..Moore.. 01/17/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jan 18 07:13:09 2026
    ACUS03 KWNS 180713
    SWODY3
    SPC AC 180712

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0112 AM CST Sun Jan 18 2026

    Valid 201200Z - 211200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected on Tuesday.

    ...Synopsis...

    A shortwave embedded within broader-scale upper troughing will move
    southeast across the Rockies into the Plains on Tuesday. As this
    occurs, lee cyclogenesis is expected over the central High Plains.
    This low will develop south/southeast into TX overnight and ensuing
    low-level south/southeasterly winds will transport modest Gulf
    moisture northward into portions of south TX late in the period.
    Forecast soundings suggest moisture will be relatively shallow and
    warmer midlevel temperatures will limit instability. While some warm
    advection showers could occur over TX Tuesday night into early
    Wednesday ahead of an southeastward advancing cold front,
    thunderstorm potential appears low.

    ..Leitman.. 01/18/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jan 18 18:54:11 2026
    ACUS03 KWNS 181854
    SWODY3
    SPC AC 181853

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1253 PM CST Sun Jan 18 2026

    Valid 201200Z - 211200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected on Tuesday or Tuesday night.

    ...Discussion...
    Dry/stable conditions for lightning-producing convection should
    persist across the CONUS through the period. The next in a series of
    shortwave troughs should progress from the Canadian Rockies towards
    the Lower MO/Mid-MS Valleys. A weak surface cyclone should similarly
    track from the northern High Plains to near Lake MI. This will
    support onshore air mass modification along the TX Gulf Coast. Scant
    but shallow buoyancy should reach the immediate south TX coast by
    12Z Wednesday, with flimsy elevated buoyancy possible northward
    across east TX. Given poor-quality thermodynamics and only weak
    large-scale ascent, thunderstorm potential in TX appears negligible.

    ..Grams.. 01/18/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Jan 19 08:19:45 2026
    ACUS03 KWNS 190819
    SWODY3
    SPC AC 190818

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0218 AM CST Mon Jan 19 2026

    Valid 211200Z - 221200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected on Wednesday.

    ...Synopsis...

    The base of a trough oriented over the middle of the CONUS will
    swing eastward across TX into the Lower MS Valley on Wednesday.
    Modified Gulf moisture will be in place across the TX coastal plain
    toward the Sabine Valley ahead of a surface cold front. Shallow convection/showers will be possible ahead of the front from coastal
    and east TX into the Mid-South. However, instability will be very
    weak inland and thunderstorm potential appears too low to include a
    general thunderstorm area.

    ..Leitman.. 01/19/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Jan 19 19:18:16 2026
    ACUS03 KWNS 191918
    SWODY3
    SPC AC 191917

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0117 PM CST Mon Jan 19 2026

    Valid 211200Z - 221200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Widely scattered weak thunderstorm activity appears possible
    Wednesday into Wednesday night across parts of eastern Texas into
    the lower Mississippi Valley.

    ...Discussion...
    Models indicate that amplified large-scale mid-level troughing will
    generally be maintained across much of interior and eastern North
    America during this period. However, it appears that the southern
    tier of the U.S. will continue to come under the increasing
    influence of westerlies emanating from the southern mid- to
    subtropical latitudes of the eastern Pacific.

    Within an amplifying belt, including building mid-level ridging
    across the mid-latitude eastern Pacific, a notable developing
    mid-level low may continue to slowly dig toward the southern California/northern Baja Pacific coast. It appears that this may be accompanied by initially elevated moisture return from the lower
    latitude eastern Pacific, across coastal areas into the Sierra
    Nevada. However, the mid-level cold core, supportive of better
    boundary-layer destabilization and the development of thermodynamic
    profiles potentially more conducive to thunderstorm development,
    will likely remain offshore through at least this period.

    Downstream, lower/mid-tropospheric moisture return may continue to
    overspread parts of southern/eastern Texas into the lower
    Mississippi Valley Wednesday through Wednesday night. It appears
    that weak boundary-layer destabilization, and one potential area of thunderstorm development, aided by forcing for ascent downstream of
    an initial perturbation emanating from the subtropical eastern
    Pacific, will remain offshore of coastal areas. However, elevated
    inland moistening beneath residually cold mid-level air might become
    sufficient for convection occasionally becoming capable of producing
    lightning by late Wednesday into Wednesday evening.

    ..Kerr.. 01/19/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jan 20 07:46:52 2026
    ACUS03 KWNS 200746
    SWODY3
    SPC AC 200745

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0145 AM CST Tue Jan 20 2026

    Valid 221200Z - 231200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected on Thursday.

    ...Synopsis...

    An upper shortwave trough/low near the CA coast will develop east
    toward southern CA/northern Baja by Friday morning. As this occurs,
    upper flow over the eastern half of the CONUS will become
    flatter/quasi-zonal. At the surface, arctic high pressure will build
    over the Canadian Prairies and begin to slide southward into the
    Plains, ushering in a very cold airmass. Forecast guidance varies in
    the location of an arctic cold front by the end of the period, but
    the expectation is that by early Friday morning, the front will be
    located somewhere near central OK to the Red River, and stretch
    eastward toward the Mid-South.

    Modified Gulf moisture will be located well south of the front from central/southern TX toward the central Gulf Coast. Isolated
    convection may develop near or to the cool side of the cold front
    late Thursday night/early Friday morning across north TX/southern OK
    within warm advection around 850 mb. However, instability is
    expected to be very minor and lighting is not expected. Further
    south in better low-level moisture, forcing for ascent will be
    limited and warm midlevel temperatures will preclude
    destabilization.

    ..Leitman.. 01/20/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jan 20 19:03:25 2026
    ACUS03 KWNS 201903
    SWODY3
    SPC AC 201902

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0102 PM CST Tue Jan 20 2026

    Valid 221200Z - 231200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Aside from the risk for a couple of thunderstorms near southern
    Florida Atlantic coastal areas, potential for thunderstorms appears
    minimal across much of the U.S. Thursday through Thursday night.

    ...Discussion...
    Models indicate that a significant short wave trough emanating from
    the Arctic latitudes will continue digging across and southeast of
    the central Canadian/U.S. border through this period, reinforcing
    broad, cold mid-level troughing across the northern U.S. Great
    Plains through middle and northern Atlantic Seaboard. In lower
    latitudes, flow is forecast to remain broadly cyclonic as far south
    as the northern Gulf Basin, but with a continued slow/subtle warming
    in mid-levels across much of the Gulf Coast states, downstream of a
    slowly digging mid-level low offshore of the southern
    California/northern Baja coast. It appears that the modest and
    compact mid-level cold core of this low will remain offshore through
    at least this period, as a sharp upstream ridge builds a bit further
    northward through the mid-latitude eastern Pacific.

    Beneath this regime, it appears that the primary frontal zone may
    remain quasi-stationary across the Carolinas through northern
    portions of the eastern Gulf Coast states. However, some further
    southward advancement is possible across the Ark-La-Miss and central
    Texas by late Thursday night, as a prominent cold surface ridge
    continues to build along an axis across the Canadian Prairies
    through middle and lower Missouri Valley.

    Some further low-level moistening is possible to the south of this
    front, off a slowly modifying Gulf and southwestern Atlantic
    boundary layer. However, beneath slowly warming mid-levels, with
    weak mid/upper support for convective development, the risk for
    thunderstorms appears limited Thursday through Thursday night.

    ...Southern Florida...
    A consensus of latest available model output, ranging from ECENS and
    GEFS convective precipitation forecasts to NAM/Rapid Refresh
    forecast soundings and NAM/RRFS convection allowing guidance,
    suggests that at least minimum threshold thunderstorm probabilities
    may become focused during this period in the vicinity of weak
    surface troughing developing near southern Florida Atlantic coastal
    areas. This appears possible in response to increasing
    boundary-layer destabilization and convergence, perhaps aided by
    forcing associated with weak perturbations within the subtropical
    westerlies.

    ..Kerr.. 01/20/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 21 07:15:57 2026
    ACUS03 KWNS 210715
    SWODY3
    SPC AC 210714

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0114 AM CST Wed Jan 21 2026

    Valid 231200Z - 241200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Isolated thunderstorms are possible across parts of Texas on Friday.

    ...Synopsis...

    An upper shortwave trough offshore southern CA and northern Baja
    will quickly eject east to northwest Mexico and the Southwest on
    Friday/Friday night. This will result in increasing southwesterly
    mid/upper flow across the southern Plains as an arctic cold front
    plunges southward across TX. Modest Gulf moisture will be in place
    ahead of the front across portions of southern TX and the TX Coastal
    Plain. As temperatures aloft cool and warm advection in the
    midlevels overspreads the southward-advancing cold front, isolated thunderstorms will be possible. A few lightning flashes could even
    accompany winter precipitation as the arctic airmass begins to
    filter southward through the period. Severe storms are not expected.

    ..Leitman.. 01/21/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 21 19:28:14 2026
    ACUS03 KWNS 211928
    SWODY3
    SPC AC 211927

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0127 PM CST Wed Jan 21 2026

    Valid 231200Z - 241200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Widely scattered weak thunderstorm activity is possible Friday
    through Friday night across parts of central Texas into the southern
    Great Plains Red River Valley.

    ...Discussion...
    Models indicate that a confluent mid-level regime will be maintained
    across and east of the Rockies, downstream of amplified split flow
    across the central/eastern Pacific into far western North America.
    Although the center of initially prominent, cold surface ridging may
    begin to weaken some while slowly shifting east of the Missouri
    Valley through the Upper Midwest, Great Lakes and Ohio Valley, the
    leading edge of the Arctic air is forecast to surge southward across
    the southern Great Plains, through much of central and southwestern
    Texas by late Friday night.

    The front is also forecast to advance further offshore of the
    southern Mid Atlantic, but slower southward through the eastern Gulf
    Coast states and lower Mississippi Valley, beneath a broad building
    mid-level ridge across much of the south central and southeastern
    U.S., downstream of mid-level troughing digging across the
    international border into the northern U.S. Rockies/Great Plains and
    a short wave trough emerging from the southern mid-latitude eastern
    Pacific.

    There remains notable spread concerning the eastward acceleration of
    the latter perturbation, generally toward Baja, during this period.
    However, guidance continues to generally indicate increasing
    low-level moistening within strengthening southerly downstream flow,
    across and north of the lower Rio Grande Valley and Texas coastal
    areas.

    ...Southern Great Plains/Red River Valley...
    Although mid-level lapse rates are not likely to steepen
    appreciably, forecast soundings suggest that lower/mid-tropospheric
    thermal and moisture advection may lead to weak destabilization by
    late Friday into Friday night, mostly above the southward advancing
    cold air. It appears that this will become increasingly sufficient
    for widely scattered to scattered convective development capable of
    producing lightning, perhaps as far north as portions of southern
    Oklahoma by 12Z Saturday.

    ..Kerr.. 01/21/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Jan 22 07:23:48 2026
    ACUS03 KWNS 220723
    SWODY3
    SPC AC 220722

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0122 AM CST Thu Jan 22 2026

    Valid 241200Z - 251200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Isolated weak thunderstorms will be possible on Saturday and
    Saturday night across portions of eastern Texas into Louisiana and
    southern Mississippi.

    ...Synopsis...

    An arctic cold front will continue to develop southeast across the
    western and central Gulf Coast vicinity on Saturday. Warm advection
    atop the boundary and cooling aloft will support modest instability.
    Isolated to widely scattered thunderstorms will be possible in the
    vicinity of the front from the Upper Texas Coast into southern LA.
    Some thunderstorm potential may even accompany convective elements
    within wintry precipitation to the cold side of the surface front.
    Severe storms are not expected.

    ..Leitman.. 01/22/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Jan 22 19:15:40 2026
    ACUS03 KWNS 221915
    SWODY3
    SPC AC 221914

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0114 PM CST Thu Jan 22 2026

    Valid 241200Z - 251200Z

    ...NO SEVERE THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    The risk for severe thunderstorms appears negligible across the U.S.
    Saturday through Saturday night.

    ...Discussion...
    Downstream of amplified split flow across the Pacific into western
    North America, models indicate that several short wave troughs will
    gradually consolidate into larger-scale mid-level troughing across
    the Rockies and Great Plains into Mississippi Valley during this
    period. This is likely to include at least a couple of merging
    perturbations of Canadian Arctic origin digging across the
    international border through the northern U.S. Rockies and Great
    Plains, and another emerging from the northern mid-latitude Pacific
    before digging inland across the Pacific Northwest coast through the
    Great Basin. Yet another impulse, emerging from the southern
    mid-latitude eastern Pacific, is generally forecast to accelerate
    across Baja and the northern Mexican Plateau, into the southern
    Great Plains by late Saturday night.

    Preceded by the southeastward development of an expansive cold
    surface ridge across much of the nation to the east of the Rockies,
    as far south as the Gulf coast vicinity, the potential for
    significant lee surface cyclogenesis appears low through this
    period. However, latest guidance appears generally consistent
    indicating modestly deepening surface troughing, accompanying
    erosion of the cold air, in one corridor across the lower
    Mississippi Valley toward the lower Ohio Valley, and another
    near/offshore of the Carolina coast by late Saturday night.
    Associated destabilization still appears likely to remain elevated,
    and generally weak, in nature inland of northwestern and central
    Gulf coastal areas, with negligible risk for severe weather through
    at least 12Z Sunday.

    ..Kerr.. 01/22/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Jan 23 08:31:46 2026
    ACUS03 KWNS 230831
    SWODY3
    SPC AC 230830

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0230 AM CST Fri Jan 23 2026

    Valid 251200Z - 261200Z

    ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PORTIONS OF
    THE CENTRAL AND EASTERN GULF COAST...

    ...SUMMARY...
    Isolated strong to severe storms are possible over portions of the
    central and eastern Gulf Coast Sunday.

    ...Synopsis...
    Intensifying mid-level troughing over the central US will continue
    to amplify as it moves eastward Sunday. Strong cyclonic flow aloft
    will overspread portions of the southern US as a second embedded
    perturbation skirts the central and eastern Gulf Coast before being consolidated into the broader upper trough. Ascent from this
    shortwave will allow a weak surface low to develop and shift
    east/northeastward over the Tennessee Valley before moving offshore
    of the Carolina coast early Monday. Attendant to the low, a strong
    arctic cold front will sweep eastward across the southern CONUS.
    Modified Gulf moisture will be in place, supporting weak instability
    and some potential for strong to severe storms.

    ...Gulf Coast...
    As the surface low moves onshore and deepens ahead of the advancing
    shortwave early Sunday, inland moisture advection (60s F surface
    dewpoints) is expected to increase over southeastern LA into
    southern MS/AL and the western FL Panhandle in the wake of a surface
    warm front lifting northward. Ongoing elevated convection near the
    advancing cold front will likely encounter a warming/moistening
    boundary layer sufficient for some intensification through the day
    across south-central AL into the FL panhandle and southwestern GA.

    Increasing southwesterly flow aloft (EBWD of 50-60 kt) will be
    favorable for some storm organization amidst weak buoyancy (MLCAPE ~
    500 J/kg). A broken band of storms along the cold front may pose a
    risk for isolated damaging gusts and brief tornado where the
    boundary layer can destabilize sufficiently inland south of the
    prominent cold air intrusion/damming and ongoing winter weather. The
    cold front will then continue offshore overnight with the severe
    risk diminishing as a much colder air mass envelops the eastern
    CONUS.

    ..Lyons.. 01/23/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Fri Jan 23 19:17:21 2026
    ACUS03 KWNS 231917
    SWODY3
    SPC AC 231916

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0116 PM CST Fri Jan 23 2026

    Valid 251200Z - 261200Z

    ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS SUNDAY INTO
    SUNDAY NIGHT ACROSS PARTS OF SOUTHEASTERN LOUISIANA...SOUTHEASTERN MISSISSIPPI,...SOUTHEASTERN ALABAMA...SOUTHERN GEORGIA AND THE
    FLORIDA PANHANDLE...

    ...SUMMARY...
    Strong thunderstorm development appears possible across parts of the
    eastern Gulf Coast states Sunday into Sunday night, accompanied by
    some risk for severe weather.

    ...Discussion...
    Within a broadly confluent regime across and east of the Rockies,
    models suggest that positively tilted larger-scale mid-level
    troughing may continue to consolidate while progressing across and
    east of the Mississippi Valley during this period, downstream of
    broad mid-level ridging within split flow developing inland of the
    Pacific coast into Intermountain West. In its wake, it appears that
    another notable cold surface ridge will build south-southeastward to
    the lee of the Rockies, through much of the Great Plains and
    Mississippi Valley by late Sunday night. Ahead of it, models
    indicate that the remnants of a preceding Arctic intrusion will
    undergo more substantive modification, but, coupled with weak inland
    upper forcing, probably not enough to support significant frontal
    surface cyclogenesis across the Allegheny Plateau or Southeast.

    ...Eastern Gulf Coast states...
    Guidance currently suggests that low-level thermal and moisture
    advection, supportive of weak boundary-layer destabilization, may be
    confined to a narrow inland spreading corridor across southeastern
    Louisiana through portions of southern/eastern Alabama and adjacent
    Georgia during the day Sunday, before being undercut/cut off by a
    developing cold front. It appears that this will coincide with, but
    generally trail to the southwest of, a modest to weak developing
    frontal wave across the Piedmont of Alabama into Georgia.

    Strong deep-layer southwesterly flow overspreading the destabilizing environment will probably still contribute to shear potentially
    conducive to organized convective development. This may include
    sizable clockwise-curved low-level hodographs within the pre-cold
    frontal warm advection regime. However, forecast soundings suggest
    that these low-level hodographs will trend more linear, as the
    initially stable boundary-layer destabilizes. So the risk for
    tornadoes seems rather limited, but there may be a window for an
    evolving line of storms with potential to produce strong surface
    wind gusts, particularly across parts of southeastern Alabama and
    the Florida Panhandle into southwestern Georgia late Sunday
    afternoon and evening.

    ..Kerr.. 01/23/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jan 24 08:31:56 2026
    ACUS03 KWNS 240831
    SWODY3
    SPC AC 240830

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0230 AM CST Sat Jan 24 2026

    Valid 261200Z - 271200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms appear unlikely Monday.

    ...Synopsis...
    Mid-level troughing and strong cyclonic flow aloft will shift
    southward over the US before gradually moving offshore Monday. A
    second trough is expected to move south out of Canada into the Great
    Lakes as it also intensifies. The mid-level flow pattern is forecast
    to continue to amplify with troughing persisting over the eastern
    US. In turn, ridging is forecast to build over the central and
    western portions of the country with increasingly strong
    northwesterly flow.

    At the surface, a robust and widespread Arctic air mass with strong
    high pressure will dominate the lower 48 as a cold front moves
    offshore into the Atlantic and down the FL Peninsula. Widespread
    winter weather and cold temperatures will largely preclude robust
    inland surface moisture outside of coastal south FL. However, weak
    lapse rates and only glancing ascent suggests thunderstorm potential
    here is low. Thus, thunderstorms and severe weather appear unlikely
    over the US on Monday.

    ..Lyons.. 01/24/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jan 24 19:00:01 2026
    ACUS03 KWNS 241859
    SWODY3
    SPC AC 241858

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1258 PM CST Sat Jan 24 2026

    Valid 261200Z - 271200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms appear unlikely Monday.

    ...Synopsis...
    A mid-level trough will eject into the Atlantic on Monday, resulting
    in widespread surface high pressure and an accompanying polar
    airmass to overspread the CONUS, diminishing thunderstorm potential.
    A surface cold front will sweep across the central and southern FL
    Peninsula Monday morning and afternoon. While a thunderstorm or two
    cannot be ruled, deep-layer ascent will remain primarily north of
    the state, which will limit thunderstorm development, warranting the withholding of thunderstorm probabilities this outlook.

    ..Squitieri.. 01/24/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jan 25 08:17:35 2026
    ACUS03 KWNS 250817
    SWODY3
    SPC AC 250816

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0216 AM CST Sun Jan 25 2026

    Valid 271200Z - 281200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are unlikely Tuesday.

    ...Synopsis...
    Mid-level troughing over the eastern US will be reinforced by
    several smaller-scale perturbations emanating from southern Canada
    and the Rockies. Western US ridging will also persist ahead of a
    weak Pacific trough favoring northwesterly flow over the central
    portions of the country. An expansive Arctic air mass with surface
    high pressure will dominate much of the continent. Offshore flow
    will limit inland moisture return and destabilization negating
    thunderstorm potential Tuesday.

    ..Lyons.. 01/25/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jan 25 19:15:10 2026
    ACUS03 KWNS 251915
    SWODY3
    SPC AC 251913

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0113 PM CST Sun Jan 25 2026

    Valid 271200Z - 281200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are unlikely Tuesday.

    ...Synopsis...
    Upper-level troughing in the East and ridging in the West will be
    maintained on Tuesday. This pattern will reinforce cold, dry, and
    stable surface conditions across the CONUS. Thunderstorm development
    is unlikely.

    ..Wendt.. 01/25/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Jan 26 08:29:43 2026
    ACUS03 KWNS 260829
    SWODY3
    SPC AC 260828

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0228 AM CST Mon Jan 26 2026

    Valid 281200Z - 291200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected Wednesday.

    ...Synopsis...
    Persistent eastern US troughing will gradually consolidate with
    pronounced northwesterly flow aloft developing over central and
    eastern CONUS. Ridging to the west will further enhanced surface
    high pressure over the Midwest. With Arctic air and widespread snow
    cover in place, cool and dry surface conditions will negate
    thunderstorm potential.

    ..Lyons.. 01/26/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Jan 26 18:41:16 2026
    ACUS03 KWNS 261841
    SWODY3
    SPC AC 261840

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1240 PM CST Mon Jan 26 2026

    Valid 281200Z - 291200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are not expected Wednesday.

    ...Synopsis...

    Surface high pressure will persist beneath broad upper
    troughing/northwest flow across the eastern two-thirds of the CONUS
    on Wednesday. This will maintain the modified arctic airmass across
    much of the country. With a large area of snow and ice cover, cold,
    dry and stable conditions will preclude thunderstorm activity.

    ..Leitman.. 01/26/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jan 27 08:32:20 2026
    ACUS03 KWNS 270832
    SWODY3
    SPC AC 270831

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0231 AM CST Tue Jan 27 2026

    Valid 291200Z - 301200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are unlikely Thursday.

    ...Synopsis...
    Broad-scale troughing will continue across the eastern half of the
    US as the primary upper trough moves off the East Coast into early
    Friday. At the same time several shortwave perturbations, emanating
    from southern Canada and the central Rockies respectively, will
    begin to converge and strengthen over the central US. In the wake of
    these systems, ridging will build over the West supporting continued
    strong northwesterly flow aloft. A cold front and Arctic high
    pressure will move south forcing offshore flow over the CONUS. This
    will again negate thunderstorm potential through the forecast
    period.

    ..Lyons.. 01/27/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jan 27 18:59:52 2026
    ACUS03 KWNS 271859
    SWODY3
    SPC AC 271858

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1258 PM CST Tue Jan 27 2026

    Valid 291200Z - 301200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms are unlikely Thursday.

    ...Synopsis...

    An upper shortwave trough will migrate from the central/southern
    Plains to the Southeast on Thursday. As this occurs, surface low
    pressure will move from OK to the Lower MS Valley. Meanwhile, a
    trailing cold front will surge southward across OK/TX. Southerly
    low-level flow ahead of the surface low and cold front will allow
    for modest Gulf moisture to work northward toward South TX and the
    lower/middle TX Coast, though more substantial moisture will remain
    offshore. Overall, thunderstorm chances are expected to be low, with
    meager instability and warmer 850-700 mb temperatures forecast. Any thunderstorm potential is expected to remain offshore over the
    western Gulf.

    ..Leitman.. 01/27/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 28 08:31:56 2026
    ACUS03 KWNS 280831
    SWODY3
    SPC AC 280830

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0230 AM CST Wed Jan 28 2026

    Valid 301200Z - 311200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorms appear unlikely Friday.

    ...Synopsis...
    Mid-level flow over the US will continue to amplify as persistent
    eastern troughing is bolstered by the arrival of a northern stream
    shortwave from Canada and a deepening southern stream wave over the
    Gulf Coast. As these systems merge, a strong upper low is excepted
    to develop across the Southern US deepening a surface low over the
    eastern Gulf and western Atlantic into early Saturday. At the same
    time, strong ridging aloft will build over the West supporting
    increasingly strong northwesterly flow. This will allow a strong
    cold front and Arctic high pressure to move out of southern Canada
    reinforcing offshore flow over the lower 48. As such, inland
    moisture return and the potential for thunderstorms appears
    unlikely.

    ..Lyons.. 01/28/2026

    $$

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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 28 18:20:26 2026
    ACUS03 KWNS 281820
    SWODY3
    SPC AC 281819

    Day 3 Convective Outlook
    NWS Storm Prediction Center Norman OK
    1219 PM CST Wed Jan 28 2026

    Valid 301200Z - 311200Z

    ...NO THUNDERSTORM AREAS FORECAST...

    ...SUMMARY...
    Thunderstorm probabilities across the U.S. for Friday through Friday
    night appear less than 10 percent.

    ...Discussion...
    Models indicate that large-scale mid-level ridging will generally be
    maintained across the U.S. Pacific coast through Rockies, with short
    wave ridging also building along the British Columbia coast, in the
    wake of a short wave trough progressing inland across the Canadian
    and adjacent northern U.S. Rockies. Precipitation accompanying an
    associated baroclinic zone may linger into Friday across the Pacific
    Northwest, with perhaps an upstream warm frontal band also
    approaching coastal Washington by late Friday night. However,
    forecast soundings suggest that thermodynamic profiles will not
    become sufficiently unstable to support an appreciable risk for
    thunderstorm activity.

    Downstream, several short wave perturbations, including one vigorous
    impulse emerging from the Hudson Bay vicinity, are forecast to
    consolidate into amplifying, positively tilted large-scale troughing
    across much of the lower Mississippi Valley and Gulf Basin through
    southern Atlantic Seaboard by late Friday night. There remains
    notable spread concerning associated surface cyclogenesis, but it
    appears that this will remain weak across the eastern Gulf and
    adjacent Southeast, before undergoing notable strengthening offshore
    of the southern/mid Atlantic coast after 12Z Saturday. Along and
    south of a strengthening frontal zone, a deepening moist
    boundary-layer may become conditionally unstable across parts of the
    Florida Keys and southeastern Florida Peninsula by Friday. However,
    forecast soundings indicate that relatively warm and dry air in
    mid/upper levels will tend to suppress thunderstorm development.

    ..Kerr.. 01/28/2026

    $$

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