Subj : MESO: Mesoscale Discussion 2021
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Tue Dec 13 2022 23:29:37

ACUS11 KWNS 132329
SWOMCD
SPC MCD 132328=20
MNZ000-SDZ000-NDZ000-140330-

Mesoscale Discussion 2021
NWS Storm Prediction Center Norman OK
0528 PM CST Tue Dec 13 2022

Areas affected...northeastern South Dakota...southwestern North
Dakota...and western Minnesota

Concerning...Heavy snow=20

Valid 132328Z - 140330Z

SUMMARY...Heavy snow with rates up to 1"/hr possible along with
reduced visibility due to blowing snow.

DISCUSSION...A surface low currently located over Nebraska continues
to lift northeastward this evening. Across the Dakotas, favorable
moisture profiles show deep saturation within the dendritic growth
layer, which will allow for snowfall rates around 1"/hr. Recent
surface observations show winds across central and eastern South
Dakota gusting to around 30-40 mph. Areas of blowing snow will be
possible, with reduced visibility. A transition zone from snowfall
to mixed precipitation (rain and freezing rain) continues just east
of the Big Sioux River, where surface temperatures are just above
freezing. HREF ensemble forecasts indicate that the zone of heaviest
snowfall rates of 1"/hr will continue to shift northward through the
evening into portions of eastern North Dakota and western Minnesota
as the low continues to track north and east.

...Thornton/Grams.. 12/13/2022

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!6igTmAFInEw6oGTFQIChmL3ACYGsska0KtHrGMmHiYUrR3FQdOby2-ueRcxhb-dgvRIZ-fR_o=
J_j_HfF8eR2byNzZLY$  for graphic product...

ATTN...WFO...FGF...FSD...ABR...BIS...

LAT...LON   46769845 47249784 47699716 47909667 47889625 47759600
            47569592 47209607 46809629 46589639 46309641 45889659
            45639659 45319666 45059662 44729664 44449667 44239674
            44209703 44229722 44089803 44009858 44079892 44409930
            44809941 44999939 45639900 46109889 46709854 46769845=20


=3D =3D =3D
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