ACUS11 KWNS 250500
SWOMCD
SPC MCD 250500=20
OHZ000-KYZ000-INZ000-ILZ000-251100-

Mesoscale Discussion 0051
NWS Storm Prediction Center Norman OK
1100 PM CST Sat Jan 24 2026

Areas affected...Southern Illinois into southern Indiana and
southwest Ohio

Concerning...Heavy snow=20

Valid 250500Z - 251100Z

SUMMARY...Heavy snow band development is anticipated through the
next several hours across portions of the Ohio River Valley.
Snowfall rates exceeding 1 inch/hour appear probable later tonight.

DISCUSSION...A broad band of heavier precipitation is beginning to
emerge from northern AR into the lower OH Valley per regional radar
mosaics over the past 1-2 hours. This comes amid strengthening
frontogenesis through a deep layer (925-700 mb per recent
mesoanalyses) as the primary upper wave begins to migrate eastward
into the southern Plains. Latest forecast guidance shows
intensifying frontogenesis across the lower MS Valley into the OH
Valley through 09-12 UTC, which will support further organization/intensification of a focused mesoscale precipitation
band. With mid-level temperatures below freezing north of the OH
River, snow should remain the predominant precipitation type.
Moderate snowfall rates will be common with a focused corridor of
higher rates (in excess of 1 inch/hour) likely. Per recent ensemble
guidance, this corridor will most likely emerge across southern IL
into southern IN and southwest OH.=20

These solutions also depict optimal banding potential during the
09-12 UTC period later tonight into early Sunday morning. However,
recent ASOS/AWOS observations from southern IL and southern IN have
shown an uptick in snowfall intensity (denoted by reduced
visibilities to 1/2 mile or less) over the past hour. These trends
suggest that the onset of heavier snowfall rates may commence
earlier than currently anticipated by most guidance as intermittent
moderate to heavy snow bands becomes more prominent with time.

..Moore.. 01/25/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8ZGbFgTaa1vT5RUGQbtpejWwPRervkOtTy3qABGEYKtI15oAS_EXqpFV66w1MefdbPacGzY0Y= kAmqpF2ug_mHNhP8u4$ for graphic product...

ATTN...WFO...RLX...ILN...LMK...IND...PAH...ILX...LSX...

LAT...LON 39118269 39008330 38248609 37788746 37478836 37358887
37458924 37648940 38458944 38728928 38968886 40158461
40308388 40298326 40208288 39988248 39738234 39498228
39248243 39118269=20


=3D =3D =3D
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