MESOSCALE DISCUSSION 1187
   NWS STORM PREDICTION CENTER NORMAN OK
   0651 PM CDT TUE JUN 03 2008
   
   AREAS AFFECTED...NRN OK...SRN KS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 438...
   
   VALID 032351Z - 040045Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 438
   CONTINUES.
   
   AS OF 2345Z...LONG-LIVED SUPERCELL WITH A HISTORY OF SIGNIFICANT
   HAIL REPORTED UP TO 3.5 INCHES IN DIAMETER HAS NOW PROGRESSED INTO
   HARPER COUNTY OK. IT CONTINUES TO EVOLVE WITHIN A FAVORABLE
   KINEMATIC/THERMODYNAMIC ENVIRONMENT. VICI OK PROFILER WELL-DEPICTED
   THE STRENGTHENING OF MID-LEVEL WLYS IN ASSOCIATION WITH IMPULSE
   EJECTING ACROSS THE CNTRL/SRN HIGH PLAINS. THIS HAS RESULTED IN
   EFFECTIVE SHEAR NEAR 60 KTS PER 23Z OBJECTIVE ANALYSIS. THIS STORM
   IS LIKELY INGESTING A HIGHER THETA-E BOUNDARY LAYER AIR MASS GIVEN
   60S SURFACE DEW POINTS N OF STALLED FRONT SITUATED FROM NEAR 20 S
   GUY TO 20 N END. AS SUCH...EXPECT A CONTINUED SEVERE HAIL/WIND
   THREAT THROUGH MID-EVENING. A NEW WW MAY BE NEEDED DOWNSTREAM OF WW
   438 INTO N-CNTRL OK/S-CNTRL KS.
   
   ..GRAMS.. 06/03/2008
   
   
   ATTN...WFO...TSA...ICT...OUN...DDC...AMA...
   
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