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Mesoscale Discussion 1422
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   MESOSCALE DISCUSSION 1422
   NWS STORM PREDICTION CENTER NORMAN OK
   0642 PM CDT MON JUL 21 2014

   AREAS AFFECTED...PARTS OF CENTRAL AND ERN ND...ADJACENT NORTH
   CENTRAL-NERN SD...AND EXTREME NWRN MN

   CONCERNING...SEVERE THUNDERSTORM WATCH 427...

   VALID 212342Z - 220115Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 427
   CONTINUES.

   SUMMARY...THE THREAT FOR DAMAGING WINDS WILL SPREAD EWD FROM CENTRAL
   INTO ERN ND AND ADJACENT SD EARLY THIS EVENING...WITH THE POTENTIAL
   FOR GUSTS TO REACH AND/OR EXCEED 55-65 KT...ESPECIALLY OVER SERN TO
   EAST CENTRAL ND.  HAIL WILL REMAIN A THREAT WITH POTENTIAL FOR A
   BRIEF TORNADO.

   DISCUSSION...TRENDS IN RADAR IMAGERY AT BIS INDICATED AN
   ACCELERATION OF A LINE OF STORMS AS THIS ACTIVITY MOVED EAST OF THE
   MISSOURI RIVER THROUGH BURLEIGH AND EMMONS COUNTIES ND.  AT
   2320Z...THIS LINE OF STORMS EXTENDED THROUGH THE COUNTIES OF SERN
   EMMONS TO WRN LOGAN...KIDDER TO SHERIDAN...WITH PORTIONS OF THE LINE
   MOVING ENEWD AT 40-45 KT.  ADDITIONAL STORMS CONTINUED OVER NERN
   ND...GENERALLY NORTH OF A BOUNDARY WHICH WAS BEGINNING TO MOVE SWD
   AND EXTENDED FROM 60 WSW DVL TO 40 W GFK TO 20 N GFK.  THE
   ENVIRONMENT ALONG AND SOUTH OF THIS BOUNDARY REMAINED EXTREMELY
   UNSTABLE /MLCAPE 4000-5000 J PER KG/.  THIS INSTABILITY COMBINED
   WITH THE FORWARD PROPAGATING LINE OF STORMS BEING ORIENTED
   PERPENDICULAR TO THE FLOW ALOFT SUGGESTS THE GREATEST POTENTIAL FOR
   SIGNIFICANT WIND GUSTS SHOULD OCCUR ACROSS SERN AND EAST-CENTRAL ND
   THROUGH 01-02Z.

   ..PETERS.. 07/21/2014


   ATTN...WFO...FGF...ABR...BIS...

   LAT...LON   46819993 47480043 48929891 48989690 47309672 46219661
               45869678 45709787 45680025 46819993 

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Page last modified: July 22, 2014
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