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Mesoscale Discussion 990
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   MESOSCALE DISCUSSION 0990
   NWS STORM PREDICTION CENTER NORMAN OK
   0926 PM CDT FRI JUN 13 2014

   AREAS AFFECTED...WRN AND CENTRAL SD / PORTIONS OF ADJACENT
   NWRN-NORTH CENTRAL NEB

   CONCERNING...SEVERE THUNDERSTORM WATCH 291...

   VALID 140226Z - 140400Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 291
   CONTINUES.

   SUMMARY...SEVERE WEATHER THREAT...MAINLY A FEW STRONG WIND GUSTS AND
   HAIL...WILL AFFECT ONE OR TWO ROWS OF COUNTIES EAST OF WW 291. 
   GIVEN A LIMITED AREAL COVERAGE AND SHORT TEMPORAL POTENTIAL...NEW WW
   ISSUANCE IS NOT PLANNED AT THIS TIME.  THE SEPARATE CLUSTER OF
   STORMS IN VICINITY AND NORTH OF THE NEB/SD BORDER WILL CONTINUE TO
   HAVE A POTENTIAL TO PRODUCE A SEVERE WEATHER THREAT.

   DISCUSSION...MOSAIC RADAR IMAGERY SHOWED AN MCV ATTENDANT TO THE
   CLUSTER OF STORMS MOVING E THROUGH NWRN TOWARD NORTH CENTRAL SD...
   WITH A RECENT WIND GUST OF 60 KT OBSERVED AT FAITH SD.  CURRENT
   THINKING SUGGESTS THE OVERALL SEVERE WEATHER THREAT WITH THIS
   CLUSTER OF STORMS SHOULD BEGIN TO WANE.  CLOUD TOPS ARE GENERALLY
   WARMING WITH THIS ACTIVITY.  THIS MAY BE INDICATING THE DIMINISHING
   TREND AS THESE STORMS ARE NOT INGESTING GREATER INSTABILITY SINCE
   THE ENVIRONMENT INTO NORTH CENTRAL SD IS MORE STABLE PER OBJECTIVE
   ANALYSES AND 00Z ABR SOUNDING. 

   MEANWHILE...THE TSTMS OVER SWRN SD FROM SHANNON TO NERN BENNETT
   COUNTIES SHOULD PERSIST AS THEY ARE LOCATED IN THE NRN EXTENT OF A
   CORRIDOR OF STRONGER INSTABILITY WITH A 45-50 KT SLY LLJ MAINTAINING
   THIS INSTABILITY FEED.

   ..PETERS.. 06/14/2014


   ATTN...WFO...ABR...LBF...UNR...CYS...

   LAT...LON   43010400 43960388 44210319 44800264 45930262 45930113
               45570057 45120038 44630010 44390000 43610002 42970020
               42890240 43010400 

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Page last modified: June 14, 2014
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