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Mesoscale Discussion 331
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   MESOSCALE DISCUSSION 0331
   NWS STORM PREDICTION CENTER NORMAN OK
   0741 PM CDT WED APR 21 2010
   
   AREAS AFFECTED...SRN TX PANHANDLE AND TX SOUTH PLAINS
   
   CONCERNING...TORNADO WATCH 73...
   
   VALID 220041Z - 220145Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 73 CONTINUES.
   
   EARLY THIS EVENING...REGIONAL RADARS INDICATED MORE PERSISTENT
   STRONG-SEVERE STORMS...INCLUDING SUPERCELLS...HAVE CONTINUED TO
   AFFECT PRIMARILY THE FAR NWRN EXTENT OF WW 73 AND THE SERN QUADRANT
   OF THIS WATCH.  COOLER SURFACE CONDITIONS AT AMA COMBINED WITH A
   STRONG CAP AT THIS LOCATION PER 00Z AMA SOUNDING SUGGEST THAT THE
   OLDHAM COUNTY STORM SHOULD BECOME ELEVATED WITH ANY EWD MOVEMENT.
   
   LOW LEVEL CONFLUENCE EXTENDING FROM NW TX THROUGH WW 73 INTO NERN NM
   SHOULD SUPPORT ADDITIONAL STORMS EARLY THIS EVENING.  HOWEVER...THE
   ONSET OF DIABATIC COOLING/INCREASING SBCINH SHOULD TEND TO LIMIT THE
   DEVELOPMENT OF STRONGER SURFACE BASED STORMS.  UPPER RIDGE CURRENTLY
   IN PLACE ACROSS THIS REGION APPEARS TO BE PRECLUDING THE DEVELOPMENT
   OF GREATER STORM COVERAGE AT THIS TIME.  THIS COMBINED WITH THE
   DIABATIC COOLING SHOULD LIMIT THE POTENTIAL FOR SUFFICIENT STORM
   COVERAGE TO EXPAND TOO FAR EWD AND PRECLUDE THE NEED FOR A NEW WW
   INTO NW TX/PARTS OF WRN OK...AT LEAST IN THE SHORT TERM.
   
   LATER THIS EVENING...A STRENGTHENING SLY LLJ ACROSS W TX INTO THE
   TX/OK PANHANDLES AND SWRN KS WILL SUPPORT AN INCREASE IN LOW LEVEL
   WAA AND THE POTENTIAL DEVELOPMENT OF AT LEAST ONE MCS...NEAR AND
   NORTH OF THE RETREATING SYNOPTIC WARM FRONT...WHICH AT 00Z EXTENDED
   WWD THROUGH THE NRN THIRD OF OK TO THE NRN TX PANHANDLE.
   
   ..PETERS.. 04/22/2010
   
   
   ATTN...WFO...OUN...SJT...LUB...AMA...MAF...ABQ...
   
   LAT...LON   35620306 35649993 32929986 32920313 35620306 
   
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