Subj : MESO: Mesoscale Discussion 2021
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Wed Dec 14 2022 00:24:39

ACUS11 KWNS 140024
SWOMCD
SPC MCD 140023 COR
MNZ000-SDZ000-NDZ000-140330-

Mesoscale Discussion 2021
NWS Storm Prediction Center Norman OK
0623 PM CST Tue Dec 13 2022

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

Concerning...Heavy snow=20

Valid 140023Z - 140330Z

CORRECTED FOR MISSING GRAPHIC

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.. 12/14/2022

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!5H_9BFRzEyTgYV5Z3eHYH1FOGkDTayxbDz_W4TzOrjoyStqMXKTEfhy6-fThZfpnesZaJXfLj=
5X8j1OxL2x62dqHrK4$  for graphic product...

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

LAT...LON   45369945 45719933 46739840 47109801 47829685 48019639
            47659586 47029590 46699604 46319623 45459687 45019691
            44589725 44479805 44509916 45369945=20


=3D =3D =3D
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