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Mesoscale Discussion 239
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   MESOSCALE DISCUSSION 0239
   NWS STORM PREDICTION CENTER NORMAN OK
   0837 PM CDT MON MAR 31 2014

   AREAS AFFECTED...NORTHWESTERN MINNESOTA...EASTERN NORTH DAKOTA...AND
   EXTREME NORTHEAST SOUTH DAKOTA

   CONCERNING...HEAVY SNOW 

   VALID 010137Z - 010630Z

   SUMMARY...HEAVY SNOW ACROSS PORTIONS OF EASTERN SOUTH DAKOTA AND
   EASTERN NORTH DAKOTA WILL CONTINUE TO LIFT TO THE NORTHEAST THIS
   EVENING. ADDITIONALLY...PRECIPITATION ACROSS CENTRAL MINNESOTA WILL
   CHANGE TO SNOW AS IT LIFTS NORTHWARD DURING THE EVENING HOURS. IN
   BOTH OF THESE AREAS...SNOWFALL RATES AROUND ONE INCH PER HOUR WILL
   REMAIN POSSIBLE.

   DISCUSSION...THUNDERSTORMS DEVELOPED THIS AFTERNOON ACROSS PORTIONS
   OF SOUTHEASTERN MINNESOTA TO THE NORTHEAST OF A STRONG SURFACE
   CYCLONE. THESE THUNDERSTORMS HAVE CONTINUED TO LIFT NORTHWARD INTO
   CENTRAL MINNESOTA THIS EVENING...THANKS IN PART TO INCREASED ASCENT
   ASSOCIATED WITH STRONG 850MB FRONTOGENESIS. AS THIS ZONE OF 850MB
   FRONTOGENESIS/ASCENT LIFTS NORTHWARD...IT WILL OVERSPREAD SURFACE
   TEMPERATURES AT OR BELOW 0C/32F RESULTING IN PRECIPITATION
   TRANSITIONING FROM RAIN TO SNOW. GIVEN THE STRONG ASCENT...AND THE
   ORIGINAL CONVECTIVE NATURE OF THIS PRECIPITATION...SNOWFALL RATES
   AROUND ONE INCH PER HOUR WILL BE POSSIBLE FOR THE NEXT FEW HOURS.

   TO THE WEST/NORTHWEST...MODEST 850-700MB FRONTOGENESIS WILL SUPPORT
   ENOUGH ASCENT TO RESULT IN SNOWFALL RATES AROUND ONE INCH PER HOUR.
   SNOWFALL RATES SHOULD BEGIN TO DIMINISH BY EARLY MORNING AS THE
   STRONGEST ASCENT/FRONTOGENESIS WEAKEN AND LIFT TO THE NORTHEAST.

   ..MARSH.. 04/01/2014


   ATTN...WFO...DLH...FGF...ABR...BIS...

   LAT...LON   47679759 47089790 46049821 45729741 45769663 45849607
               46419559 46779510 46929477 47339352 47539269 48179247
               48429333 48759464 49289478 48969515 49009576 48849696
               48159741 47679759 

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Page last modified: April 01, 2014
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