Subj : MESO: Mesoscale Discussion 0183
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Feb 23 2023 11:06:54

ACUS11 KWNS 231106
SWOMCD
SPC MCD 231106=20
MIZ000-WIZ000-MNZ000-231700-

Mesoscale Discussion 0183
NWS Storm Prediction Center Norman OK
0506 AM CST Thu Feb 23 2023

Areas affected...Portions of southern/eastern MN into northern WI
and the U.P. of MI

Concerning...Heavy snow=20

Valid 231106Z - 231700Z

SUMMARY...Band of moderate to heavy snow, with rates occasionally
approaching 1 inch per hour, should shift east-northeastward this
morning.

DISCUSSION...A negatively tilted shortwave trough will continue to
eject northeastward this morning across the Upper Midwest and Great
Lakes. Large-scale ascent associated with this feature is supporting
an ongoing band of moderate to heavy snow across southern/central
MN. An enhanced surface pressure gradient in place over this region
is fostering some blowing snow with reduced visibilities and gusty
winds. A separate band of mainly moderate snowfall is occurring
across far northern WI into the U.P of MI.

Current expectations are for the southern band in MN to shift
quickly northeastward across northern WI this morning, and
eventually into the U.P. of MI. RAP forecast soundings across this
region show a sub-freezing temperature profile through the saturated
low/mid levels. The presence of steep lapse rates around the 650-400
mb layer, which should partially overlap the dendritic growth zone,
will probably aid in the snowfall band maintaining its intensity.
Snowfall rates around 1 inch per hour will be possible for a couple
hours, even though the band should move quickly over any specific
location. Eventually this southern band should merge with the
northern band, with a continued threat for occasional 1 inch per
hour rates across far northern WI and the U.P. through the rest of
the morning.

...Gleason.. 02/23/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!-MWvGQAWTXklqjR-YBHWv-VhJe-4nQur4SNFr52GmI61sOCoIyHSfeEGTQdbvA0G4c8DA0EGY=
jrqylvzkhl6j2IZDvY$  for graphic product...

ATTN...WFO...MQT...GRB...DLH...ARX...MPX...

LAT...LON   44379063 44179243 44199402 44609458 45519500 46009429
            46699211 47039056 47218872 46948771 46628720 46608654
            46758601 46358583 45938607 45628653 45198697 44838841
            44379063=20


=3D =3D =3D
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