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Mesoscale Discussion 859
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   MESOSCALE DISCUSSION 0859
   NWS STORM PREDICTION CENTER NORMAN OK
   0531 PM CDT MON JUN 01 2015

   AREAS AFFECTED...MUCH OF CENTRAL/SOUTHERN MONTANA AND NORTHWESTERN
   WYOMING

   CONCERNING...SEVERE THUNDERSTORM WATCH 246...

   VALID 012231Z - 012330Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 246
   CONTINUES.

   SUMMARY...SEVERE THREAT CONTINUES ACROSS WW 246.

   DISCUSSION...STRONG TO OCCASIONALLY SEVERE THUNDERSTORMS ARE ONGOING
   ALONG THE LEADING EDGE OF AN EWD-MOVING COLD POOL FROM 45 NW HLN TO
   NEAR BZN TO NEAR MQM. ADDITIONAL THUNDERSTORMS WERE OCCURRING EAST
   OF THIS AREA IN CENTRAL/SOUTHERN MONTANA AND NORTHWESTERN WYOMING.
   DEEP SHEAR AND WEAK INSTABILITY CONTINUE TO REMAIN FAVORABLE FOR
   OCCASIONAL INSTANCES OF SEVERE HAIL AND DAMAGING WIND GUSTS IN THE
   STRONGEST STORMS ACROSS CENTRAL AND EASTERN PARTS OF THE WATCH AREA
   DOWNSTREAM OF THE ADVANCING COLD POOL. FARTHER WEST...CONVECTIVE
   OVERTURNING HAS STABILIZED THE AREA WEST OF THE LEADING EDGE OF THE
   COLD POOL...AND CONTINUED CLOUDINESS SHOULD LIMIT ANY ATMOSPHERIC
   RECOVERY IN THAT AREA RESULTING IN A DECREASED SEVERE THREAT.
   WESTERN PARTS OF WW 246 MAY BE CANCELLED BEFORE THE SCHEDULED
   EXPIRATION.

   ..COOK.. 06/01/2015


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

   LAT...LON   44571322 45261297 46471247 47051238 47441183 47651059
               47630908 47190821 46560793 45870823 45280859 44630895
               44220924 44000978 44091049 44281075 44391114 44571322 

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Page last modified: June 01, 2015
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