Subj : MESO: Mesoscale Discussion 0307
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Wed Mar 22 2023 00:34:45

ACUS11 KWNS 220034
SWOMCD
SPC MCD 220034=20
MNZ000-220530-

Mesoscale Discussion 0307
NWS Storm Prediction Center Norman OK
0734 PM CDT Tue Mar 21 2023

Areas affected...Northwest into north central MN

Concerning...Heavy snow=20

Valid 220034Z - 220530Z

SUMMARY...Snowfall rates of 1 to 1.5 inches per hour will spread
northeastward into northwest and north central MN through 06z.

DISCUSSION...A midlevel shortwave trough and associated vorticity
lobes will continue to move east-northeastward from central SD
toward northern MN through the overnight hours.  Associated surface
cyclogenesis is underway across northeast SD, though the primary
surface warm sector is confined to extreme southern MN.  A zone of
warm advection and differential CVA will continue to support
precipitation development northeastward from southeast ND into MN
tonight.  Along and northwest of the surface cyclone track, wet bulb
profiles will remain below 0 C, supporting snow as the primary
precipitation type.  As the column saturates, snowfall rates of 1 to
1.5 inches per hour this evening will spread into northwest MN, and
continue northeastward into north central MN through 06z. The
snowfall rates are supported by recent observations in southeast ND.

...Thompson.. 03/22/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!6z43i9rEh4_ycS6yqovyZMqvAqYOmrvxqfLXVK5-mGjjZnWoqj1k9sq8s9s_4_ICUDB3Dm4ss=
-QjDOOr34Iq_HFfuWQ$  for graphic product...

ATTN...WFO...DLH...FGF...

LAT...LON   48499534 48799465 48599402 48659315 48019314 47179389
            46539485 46479558 46689606 47369626 47859607 48499534=20


=3D =3D =3D
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