SPC MD 1779



MD 1779 CONCERNING HEAVY SNOW FOR NORTHEASTERN NEBRASKA…EASTERN SOUTH DAKOTA…WESTERN/CENTRAL MINNESOTA…AND FAR NORTHWESTERN IOWA

MD 1779 Image


Mesoscale Discussion 1779
NWS Storm Prediction Center Norman OK
0942 AM CST Tue Nov 10 2020

Areas affected...northeastern Nebraska...eastern South
Dakota...western/central Minnesota...and far northwestern Iowa

Concerning...Heavy snow 

Valid 101542Z - 102145Z

SUMMARY...Periods of heavy snow will occur across the discussion
area through the afternoon.

DISCUSSION...Radar mosaic imagery depicts a broad area of moderate
to locally heavy snow over northeastern Nebraska and eastern South
Dakota currently.  A weak surface low was also located south of this
area across northwestern Missouri, and a negative-tilt mid-level
wave was analyzed over central Nebraska.  The eastward progression
of this mid-level wave - in concert with increasing frontogenesis
and gradual strengthening of the surface low - will aid in
increasing snowfall rates along with northeastward progression of
the precipitation shield through the afternoon.  This notion is also
supported by recent high-resolution guidance.  Rates of 1-2 inches
per hour will accompany the snow through the afternoon.  Areas along
the eastern extent of the MD area (northwest Iowa into central
Minnesota) may see occasional mixing with freezing rain or sleet at
times as well.

..Cook.. 11/10/2020

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...DLH...MPX...FGF...FSD...OAX...ABR...GID...LBF...

LAT...LON   43489529 44009490 44589456 45029424 45249388 45889374
            46159407 46269481 46219549 45959663 45649731 44599830
            43009856 41839842 41319789 41469726 42189632 42789583
            43489529 

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