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Mesoscale Discussion 873
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   MESOSCALE DISCUSSION 0873
   NWS STORM PREDICTION CENTER NORMAN OK
   0154 AM CDT SAT JUN 07 2014

   AREAS AFFECTED...CENTRAL AND ERN OK

   CONCERNING...SEVERE THUNDERSTORM WATCH 251...

   VALID 070654Z - 070900Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 251
   CONTINUES.

   SUMMARY...RISK FOR DAMAGING WINDS CONTINUES WITH THE LINE OF STORMS
   CROSSING CENTRAL OK/WW 251.

   DISCUSSION...LATEST RADAR LOOP SHOWS A LINE OF STORMS MOVING EWD
   ACROSS CENTRAL OK AT AROUND 40 KT ATTM...THROUGH AN AMPLY
   UNSTABLE/MODERATELY SHEARED ENVIRONMENT.  STRONG TO SEVERE WIND
   GUSTS HAVE BEEN RECORDED WITH PASSAGE OF THIS LINE OF STORMS AT
   SEVERAL OBSERVING SITES...INCLUDING AN 87 MPH GUST AT OKC IN THE
   LAST HALF HOUR.  EVENING KOUN RAOB DEPICTS SUBSTANTIAL DRY AIR ALOFT
   IN THE 850 TO 500 MB LAYER -- POSSIBLY AIDING IN EVAPORATIVE EFFECTS
   ENHANCING DOWNDRAFTS/OUTFLOW WITH THESE STORMS.

   WITH THE MAIN AXIS OF INSTABILITY RESIDING ACROSS OK...SEVERE RISK
   MAY REMAIN LARGELY CONFINED TO THE EXISTING WW AREA.  THUS...NEED
   FOR AN ADDITIONAL/DOWNSTREAM WATCH INTO FAR ERN OK/AR REMAINS
   UNCERTAIN ATTM AND AS SUCH WE WILL CONTINUE TO MONITOR EVOLUTION OF
   THE LINE AND ASSOCIATED SEVERE RISK.

   ..GOSS.. 06/07/2014


   ATTN...WFO...LZK...SGF...SHV...TSA...OUN...

   LAT...LON   34359816 35049774 36039740 36259706 36739690 36999671
               36999523 36479418 35189423 34329472 34359816 

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Page last modified: June 07, 2014
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