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Mesoscale Discussion 679
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   MESOSCALE DISCUSSION 0679
   NWS STORM PREDICTION CENTER NORMAN OK
   0911 PM CDT SUN MAY 23 2010
   
   AREAS AFFECTED...CNTRL/NERN MN
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 206...
   
   VALID 240211Z - 240315Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 206
   CONTINUES.
   
   MARGINAL SEVERE HAIL THREAT SHOULD PERSIST FOR A FEW MORE HOURS WITH
   ONGOING TSTMS INVOF QUASI-STATIONARY FRONT LOCATED FROM NEAR RWF TO
   30 E ELO AS OF 02Z. AN ADDITIONAL WW DOES NOT APPEAR NECESSARY
   BEYOND 03Z SCHEDULED EXPIRATION OF WW 206.
   
   WEAK LIFT WITHIN THE FRONTAL ZONE SHOULD SUPPORT A CONTINUATION OF
   TSTM ACTIVITY INTO LATE EVENING...GIVEN THE PRESENCE OF STRONG
   POTENTIAL INSTABILITY WITHIN THE WARM SECTOR. NEVERTHELESS...21Z
   SREF AND 00Z RUC FORECASTS INDICATE CAPPING INVERSION WILL
   STRENGTHEN S OF THE FRONTAL ZONE /NOTED IN AMDAR DATA INVOF MSP AND
   UPSTREAM 00Z OMAHA NEB RAOB/ AND WARMING AROUND 700 MB WILL INCREASE
   ALONG AND N OF THE FRONT. GIVEN THE AREA SHOULD REMAIN ON THE FAR
   ERN EXTENT OF A ROBUST LOW-LEVEL WARM THETA-E ADVECTION REGIME
   CENTERED OVER NEB/SD...TSTM COVERAGE SHOULD TEND TO WANE BY 06Z.
   
   ..GRAMS.. 05/24/2010
   
   
   ATTN...WFO...DLH...MPX...
   
   LAT...LON   46289372 47519234 48129135 48139067 47809078 47299130
               46519240 45699324 45289369 44859413 44749454 44909486
               46289372 
   
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