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Mesoscale Discussion 582
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   MESOSCALE DISCUSSION 0582
   NWS STORM PREDICTION CENTER NORMAN OK
   0105 AM CDT TUE APR 30 2013
   
   AREAS AFFECTED...N-CNTRL IA INTO SWRN WI
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 145...
   
   VALID 300605Z - 300700Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 145
   CONTINUES.
   
   SUMMARY...AN OCCASIONAL MARGINALLY SEVERE HAIL THREAT SHOULD
   CONTINUE FOR THE NEXT SEVERAL HOURS.
   
   DISCUSSION...RADAR MOSAIC SHOWS A CLUSTER OF STORMS MOVING NEWD OVER
   N-CNTRL IA.  THESE STORMS SHOULD PERSIST INTO THE OVERNIGHT HOURS
   OWING IN PART TO A 60 KT LLJ SAMPLED BY THE KDMX VWP.  STEEP LAPSE
   RATES AND DEEP LAYER SHEAR SUPPORTIVE OF STORM ORGANIZATION WILL
   SUPPORT A PERSISTENT THREAT FOR MARGINALLY SEVERE HAIL FROM N-CNTRL
   IA INTO SWRN WI.  
   
   CONVECTIVE TRENDS WILL BE MONITORED IN THE SHORTER TERM IF STORMS
   CAN DEVELOP FARTHER SW OVER SWRN IA.  IF THE CAP CONTINUES TO
   HOLD...THIS AREA /INCLUDING THE DES MOINES METRO/ MAY BE DROPPED
   FROM THE WATCH WITHIN THE NEXT 1-2 HRS.
   
   ..SMITH.. 04/30/2013
   
   
   ATTN...WFO...MKX...DVN...ARX...DMX...
   
   LAT...LON   42888997 42259195 42359365 42899383 43599051 43378998
               43078986 42888997 
   
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Page last modified: April 30, 2013
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