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Mesoscale Discussion 319
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   MESOSCALE DISCUSSION 0319
   NWS STORM PREDICTION CENTER NORMAN OK
   0541 PM CDT THU APR 16 2015

   AREAS AFFECTED...A SMALL PART OF WRN OK

   CONCERNING...SEVERE THUNDERSTORM WATCH 63...

   VALID 162241Z - 170015Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 63
   CONTINUES.

   SUMMARY...A SMALL PART OF W-CNTRL OKLAHOMA IS BEING MONITORED FOR A
   POSSIBLE UPGRADE TO TORNADO WATCH.

   DISCUSSION...SUPERCELL STORMS...EMBEDDED IN CLUSTERS AND
   DISCRETE...ARE EVOLVING ACROSS ERN PARTS OF THE TX PANHANDLE AND MAY
   SPREAD INTO ADJACENT PARTS OF FAR WRN OK DURING THE NEXT FEW HOURS.
   SFC OBSERVATIONS FROM THE OKLAHOMA MESONET SAMPLE BACKED/SE SFC
   WINDS DOWNSTREAM OF THE ONGOING ACTIVITY...WHICH WILL ENHANCE
   STREAMWISE VORTICITY FOR SUPERCELLS AS THEY SPREAD EWD --
   MAINTAINING A TORNADO RISK. WHILE DEEP SHEAR IS RELATIVELY WEAKER
   WITH EWD EXTENT INTO WRN OK...SUSTAINED STORM-SCALE CIRCULATIONS MAY
   BE MAINTAINED A TIER OR TWO OF COUNTIES EWD INTO FAR WRN OK IN THE
   STEEP LAPSE RATE ENVIRONMENT.

   ..COHEN/CORFIDI.. 04/16/2015


   ATTN...WFO...OUN...

   LAT...LON   35279994 36139989 36039927 35369910 35219943 35279994 

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Page last modified: April 17, 2015
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