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Mesoscale Discussion 54
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   MESOSCALE DISCUSSION 0054
   NWS STORM PREDICTION CENTER NORMAN OK
   1009 AM CST SUN FEB 02 2014

   AREAS AFFECTED...SWRN/S-CNTRL/CNTRL OK AND WRN NORTH TX

   CONCERNING...HEAVY SNOW 

   VALID 021609Z - 021815Z

   SUMMARY...SNOW WILL BE TAPERING OFF FROM NW TO SE INTO EARLY
   AFTERNOON...THOUGH LOCALIZED SNOW RATES TO 1 INCH/HR MAY PERSIST IN
   PARTS OF S-CNTRL OK AND WRN NORTH TX FOR A COUPLE MORE HOURS.

   DISCUSSION...COMPOSITE RADAR IMAGERY AND SFC OBSERVATIONS CONTINUE
   TO INDICATE THE EROSION OF THE NWRN EDGE OF THE ONGOING SRN-PLAINS
   PRECIPITATION SHIELD. THIS IS OCCURRING AS A MID-LEVEL DRY SLOT
   PRECEDING AN UPSTREAM SHORTWAVE IMPULSE -- EMERGING OVER THE TX S
   PLAINS PER MOISTURE-CHANNEL IMAGERY -- IS OVERTAKING THE LEADING
   WARM CONVEYOR STRUCTURE. AS SUCH...SNOW WILL CONTINUE TO TAPER OFF
   FROM NW TO SE THROUGH THE MORNING...ENDING AROUND 17Z IN THE
   OKLAHOMA CITY TO FORT SILL CORRIDOR...AND AROUND 1730Z-1800Z IN
   NORMAN. FARTHER SOUTH INTO S-CNTRL OK AND WRN NORTH TX...SNOWFALL
   RATES TO 1 INCH/HOUR WILL LIKELY PERSIST FOR THE REMAINDER OF THE
   MORNING BEFORE TAPERING OFF IN RESPONSE TO MID-LEVEL DRYING EARLY
   THIS AFTERNOON. ANY ONGOING SLEET ACROSS PARTS OF WRN NORTH TX
   SHOULD CHANGE TO SNOW IN THE NEXT HOUR OR TWO AS DEEP ASCENT
   PRECEDING THE TROUGH ADIABATICALLY COOLS THE ELEVATED WARM NOSE
   SAMPLED BY THE 12Z FWD RAOB.

   ..COHEN.. 02/02/2014


   ATTN...WFO...FWD...OUN...SJT...

   LAT...LON   35209813 35519726 35079659 34119684 33529765 32949895
               33249982 34189975 35209813 

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Page last modified: February 02, 2014
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