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Mesoscale Discussion 144
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   MESOSCALE DISCUSSION 0144
   NWS STORM PREDICTION CENTER NORMAN OK
   1049 AM CST WED FEB 24 2016

   AREAS AFFECTED...PORTIONS OF LOWER MI

   CONCERNING...HEAVY SNOW 

   VALID 241649Z - 242245Z

   SUMMARY...HEAVY SNOW IS FORECAST TO DEVELOP NEWD/NWD...AFFECTING
   PORTIONS OF LOWER MI THROUGH THE AFTERNOON HOURS. SNOWFALL RATES OF
   1.0-1.5 INCHES PER HOUR WILL BE LIKELY.

   DISCUSSION...WATER-VAPOR IMAGERY INDICATES A DEFORMATION-ZONE/
   COMMA-HEAD STRUCTURE AFFECTING PARTS OF LOWER MI...ASSOCIATED WITH A
   DEEP EXTRATROPICAL CYCLONE. AS THIS CYCLONE CROSSES PORTIONS OF THE
   LOWER GREAT LAKES AND OHIO VALLEY REGION...PRECIP WILL CONTINUE TO
   SPREAD NEWD ACROSS LOWER MI THROUGH THE AFTERNOON. THERE WILL BE A
   TENDENCY FOR THE NRN EXTENT OF THIS ACTIVITY TO SHIFT NWD WITH
   TIME...AS SFC LOW PRESSURE TO THE S OF THE REGION FURTHER
   INTENSIFIES ALONG ITS NEWD TRACK. DEEP SUB-FREEZING PROFILES SAMPLED
   BY THE 12Z DTX/APX RAOBS...AND MODESTLY DEEP DENDRITIC GROWTH ZONES
   BETWEEN H7 AND H5...IMPLY SNOW BEING THE PREDOMINANT PRECIP TYPE.
   FRONTOGENETIC CIRCULATIONS AND RELATED ASCENT SHOULD BE SUFFICIENTLY
   STRONG/DEEP TO SUPPORT SNOWFALL RATES OF 1.0-1.5 INCHES PER HOUR
   THROUGH THE AFTERNOON -- CONTINUING INTO THE EVENING ACROSS PARTS OF
   NERN LOWER MI. LOCALLY STRONG WINDS WILL CREATE BLOWING/DRIFTING
   SNOW AND MUCH-REDUCED VISIBILITIES.

   ..COHEN.. 02/24/2016


   ATTN...WFO...DTX...APX...IWX...GRR...

   LAT...LON   41948493 41768619 41928662 42598628 43868521 44568406
               44688334 44308296 43858280 43038332 41948493 

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Page last modified: February 24, 2016
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