|Mesoscale Discussion 1779|
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Mesoscale Discussion 1779
NWS Storm Prediction Center Norman OK
0354 PM CST Mon Dec 04 2017
Areas affected...portions of eastern ND...northwest/west-central MN
and northeast SD
Valid 042154Z - 050200Z
SUMMARY...Heavy snow, with rates of one inch/hour will progress from
west to east across the discussion area through this evening.
Strong surface wind gusts of 40-50 mph will combine with with the
snow to result in areas experiencing blizzard conditions.
DISCUSSION...at 21Z an intensifying surface low was located along
the MN-WI border northeast of MSP, while an upper-level shortwave
trough was located over central NE/SD. Regional radar imagery
depicts an area of moderate-heavy snow associated with a deformation
zone extending from northwest MN/eastern ND south into eastern SD.
Strong large-scale ascent associated with this deformation zone will
move east through this evening across the discussion area, and
short-term forecast soundings continue to show a favorable
environment for heavy snow with rates of around one inch/hour.
Strong surface winds with gusts of 40-50 mph will also continue and
develop east with time as the deepening surface low lifts northeast
tonight. As a result, areas of visibilities at or below 1/4-mile
can be expected, resulting in blizzard conditions.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 48999731 49009625 48969544 48439541 47829558 47079580
45899621 45459639 45139652 44769652 44599684 44599753
44689811 44789841 45119858 47069829 48449750 48999731
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