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Mesoscale Discussion 382
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   MESOSCALE DISCUSSION 0382
   NWS STORM PREDICTION CENTER NORMAN OK
   0520 PM CDT TUE APR 22 2014

   AREAS AFFECTED...PARTS OF SWRN MT...ERN ID/ADJACENT NRN UT INTO WRN
   WY

   CONCERNING...SEVERE THUNDERSTORM WATCH 86...

   VALID 222220Z - 222345Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 86
   CONTINUES.

   SUMMARY...PRE-FRONTAL CONVECTION...INCLUDING SCATTERED
   THUNDERSTORMS...WILL CONTINUE TO OVERSPREAD THE REGION THROUGH
   00-02Z.  STRONGER CELLS MAY BE ACCOMPANIED BY LOCALIZED SURFACE
   GUSTS REACHING SEVERE CRITERIA.

   DISCUSSION...ANY POTENTIAL FOR CONVECTIVELY ENHANCED GUSTS APPEARS
   TO BE RAPIDLY DIMINISHING IN THE WAKE OF THE COLD FRONT WHICH IS NOW
   ADVANCING EAST OF HELENA...BUTTE...DILLON...IDAHO FALLS...AND
   POCATELLO.  OTHERWISE...CONVECTION...INCLUDING SCATTERED
   THUNDERSTORM ACTIVITY DOES CONTINUE TO DEVELOP ALONG AND IMMEDIATELY
   AHEAD OF THE FRONT...AIDED BY STRONG FORCING FOR UPWARD VERTICAL
   MOTION.  DUE WEAK INSTABILITY...PRIMARILY AS THE RESULT OF LIMITED
   MOISTURE...STORMS MAY NOT BE PARTICULARLY STRONG.  BUT THEY COULD BE
   VIGOROUS ENOUGH TO ENHANCE THE DOWNWARD TRANSFER OF MOMENTUM
   ASSOCIATED WITH 40+ KT MEAN LOWER/MID TROPOSPHERIC FLOW FIELDS
   ACROSS THE HIGHER TERRAIN OF WESTERN WYOMING.

   ..KERR.. 04/22/2014


   ATTN...WFO...BYZ...RIW...TFX...SLC...PIH...MSO...

   LAT...LON   41971239 42421201 43261197 43991183 44711204 45291213
               45871265 46511270 47141201 47451104 47130994 46030957
               42701031 41731136 41971239 

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Page last modified: April 22, 2014
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