• MESO: Mesoscale Discussion 0040

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jan 24 07:29:56 2026
    ACUS11 KWNS 240729
    SWOMCD
    SPC MCD 240729=20
    OKZ000-TXZ000-241130-

    Mesoscale Discussion 0040
    NWS Storm Prediction Center Norman OK
    0129 AM CST Sat Jan 24 2026

    Areas affected...Northwest/Southwest/North-Central
    TX...South-Central/Southeast OK

    Concerning...Winter mixed precipitation=20

    Valid 240729Z - 241130Z

    SUMMARY...A mix of freezing rain and sleet is expected to persist
    from southwest Texas into north-central Texas and
    south-central/southeast Oklahoma throughout the morning.

    DISCUSSION...Surface observations around the region currently place
    the freezing line from Bonham (in Fannin County TX) southwestward
    through northwest Tarrant County before diving more
    south-southwestward through San Saba, TX. This orientation puts much
    of the DFW Metroplex just above freezing, with some temperatures
    actually increasing a degree or two amid light precipitation and
    resultant wet bulbing. Even so, continued cold-air advection is
    anticipated, with temperatures eventually dropping below freezing
    later this morning. Those areas already below freezing will also see temperatures continue to decrease throughout the morning.

    Current regional radar imagery shows some banding across
    north-central TX (northwest of the Metroplex), where strong 850mb
    warm-air advection is ongoing. Correlation coefficient from KFWS
    suggests most of this is sleet. Additionally, a large area of light precipitation continues to build upstream of the region amid modest
    lift attendant to a subtle lead shortwave trough and continued
    isentropic ascent. Expectation is for precipitation to continue
    across this region for the next several hours, with sleet as the
    prominent p-type across southwest/northwest TX and south-central OK.
    Freezing rain will likely become more common across north-central TX
    over the next hour or two, with another transition to sleet possible
    later this morning as the surface continues to cool.

    ..Mosier.. 01/24/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5X1-Fi2gzsjfc_gJs1LKfFYthNRhI_fzmfzoRBwRYEztiPczj4slQgrcO3CrD9rg6eHhbVx9J= ONi4uKGAWKBeC65JXc$ for graphic product...

    ATTN...WFO...SHV...TSA...FWD...OUN...SJT...LUB...MAF...

    LAT...LON 33530002 34539740 34689541 33419497 32439587 31120069
    32130113 33530002=20


    =3D =3D =3D
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