SPC MD 171



MD 0171 CONCERNING HEAVY SNOW FOR EASTERN NORTH AND SOUTH DAKOTA…WESTERN MINNESOTA

MD 0171 Image

Mesoscale Discussion 0171
NWS Storm Prediction Center Norman OK
1111 AM CST Sat Mar 09 2019

Areas affected...eastern North and South Dakota...western Minnesota

Concerning...Heavy snow 

Valid 091711Z - 092115Z

SUMMARY...Heavy snow, with rates of one inch/hour, will continue and
expand east through mid afternoon.

DISCUSSION...An upper-level trough over the central and northern
Plains will continue to become more negatively tilted through this
afternoon as it pivots northeast, with increasing large-scale ascent
developing over the discussion area through mid afternoon.  Cooling
low/mid-level temperatures will allow a transition of mixed
precipitation types across southern portions of the discussion area
to all snow in the 18Z-20Z time frame as the warm nose shifts east. 
RAP forecast soundings continue to depict favorable lift/saturation
within the dendritic growth zone developing for a few hours,
supporting snowfall rates of around one inch/hour.

..Bunting.. 03/09/2019

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

ATTN...WFO...MPX...FGF...FSD...ABR...

LAT...LON   46349502 44949465 44289475 43959517 43899613 44109689
            44239704 44489727 45359783 45949789 47439787 48139678
            47649560 46349502 

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