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Mesoscale Discussion 115
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   MESOSCALE DISCUSSION 0115
   NWS STORM PREDICTION CENTER NORMAN OK
   0212 PM CST WED MAR 04 2015

   AREAS AFFECTED...SOUTHEAST OK...W-CENTRAL AR...NORTH TX

   CONCERNING...WINTER MIXED PRECIPITATION 

   VALID 042012Z - 050015Z

   SUMMARY...SLEET AND LIGHT FREEZING RAIN WILL CONTINUE TO DEVELOP
   SOUTHEAST INTO PORTIONS OF WEST-CENTRAL AR...SOUTHEAST OK AND NORTH
   TEXAS INTO THE LATE AFTERNOON AND EVENING. SLEET WILL BE THE MAIN
   PRECIPITATION TYPE WITH AN EVENTUAL TRANSITION TO SNOW EXPECTED
   LATER TONIGHT.

   DISCUSSION...MIXED WINTER PRECIPITATION WAS MOVING INTO PORTIONS OF
   S-CENTRAL OK AND NORTH TX NEAR THE RED RIVER WHERE TEMPERATURES WERE
   IN THE 29-32 DEG F RANGE. AS PRECIPITATION CONTINUES...AND THE
   MODIFIED ARCTIC AIRMASS CONTINUE TO SLOWLY PROGRESS SOUTHWARD...RAIN
   WILL EVENTUALLY CHANGE TO SLEET AND SOME LIGHT FREEZING RAIN ACROSS
   PORTIONS OF NORTH TEXAS INTO W-CENTRAL AR. HERE...WET-BULB
   TEMPERATURES WERE IN THE 32-35 DEGREE F RANGE AND WILL CONTINUE TO
   FALL WITH THE SOUTHWARD PROGRESSION OF THE LOW LEVEL COLD AIR. WEAK
   WARM ADVECTION LEADING TO ISENTROPIC UPGLIDE AHEAD OF THE UPPER
   SHORTWAVE IMPULSE AND A BAND OF 850-700 MB FRONTOGENESIS SHOULD
   ALLOW FOR REGENERATION OF PRECIPITATION. SEVERAL ROUNDS OF LIGHT
   WINTRY PRECIPITATION ARE EXPECTED THROUGH THE EVENING HOURS WITH AN
   EVENTUAL CHANGE OVER TO SNOW DURING THE NIGHTTIME HOURS.

   ..LEITMAN.. 03/04/2015


   ATTN...WFO...LZK...SHV...TSA...FWD...OUN...

   LAT...LON   35599367 35689399 35609460 34869663 34019838 33629871
               33279864 32929814 33009720 33189654 33509568 34149491
               34789402 35189353 35369350 35599367 

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Page last modified: March 05, 2015
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