Subj : MESO: Mesoscale Discussion 0180
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Wed Feb 22 2023 21:28:10

ACUS11 KWNS 222128
SWOMCD
SPC MCD 222127=20
MIZ000-WIZ000-ILZ000-IAZ000-230130-

Mesoscale Discussion 0180
NWS Storm Prediction Center Norman OK
0327 PM CST Wed Feb 22 2023

Areas affected...Parts of WI...lower MI...and far northern IL

Concerning...Winter mixed precipitation=20

Valid 222127Z - 230130Z

SUMMARY...Mixed winter precipitation, including freezing rain,
sleet, and moderate to heavy snow, will continue into the evening
across portions of Wisconsin, lower Michigan, and far northern
Illinois.

DISCUSSION...Freezing rain and sleet are ongoing across southern
Wisconsin, southern lower Michigan, and far northern Illinois in
association with isentropic lift from a strong mid-level shortwave
trough currently near the Mississippi River. As the trough and
associated differential vorticity advection continue to approach the
region, heavy precipitation will expand northward. Across southern
portions of this region, short-term RAP guidance indicates warm
temperatures aloft (approximately 5C at 850mb), which is favorable
for freezing rain where surface temperatures are below freezing,
though some sleet may mix in. Farther north, the entire column is
below freezing, which is favorable for snow. Snow rates of around
1"/hour are possible, particularly as the differential vorticity
advection results in deeper lift and a more saturated dendritic
growth zone.

...Supinie/Weinman.. 02/22/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!8GznLRP_yYyqCr-0K_WKi1N4ZpEUWpUg6awyKfGEmDEtfKeXoAQGfHLga6pho6rh5fZ1KMlMo=
ur70GX88Xcs4Vnlxqk$  for graphic product...

ATTN...WFO...DTX...APX...IWX...GRR...GRB...LOT...MKX...DVN...
ARX...

LAT...LON   41908304 41778410 41808507 41858640 41878701 42028825
            42188923 42298946 42879081 43429119 44549059 44998998
            45048771 44928519 44668324 44258289 43718254 43028245
            42588250 42188287 41908304=20


=3D =3D =3D
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