MESOSCALE DISCUSSION 0591
   NWS STORM PREDICTION CENTER NORMAN OK
   0821 PM CDT SUN APR 26 2009
   
   AREAS AFFECTED...NERN KS...NWRN/NRN MO...SRN/ERN IA...SWRN
   WI...EXTREME NWRN IL
   
   CONCERNING...TORNADO WATCH 194...
   
   VALID 270121Z - 270215Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 194 CONTINUES.
   
   CONVECTIVE MODE WITHIN TORNADO WATCH 194 HAS EVOLVED TOWARD A BOWING
   LEWP STRUCTURE EXTENDING FROM NERN IA SW INTO NWRN MO AND NERN KS.
   SVR/NEAR SVR WIND GUSTS HAVE BEEN OBSERVED WITH THE IA SEGMENT OF
   THE LEWP...AND RADAR REFLECTIVITY INDICATES THAT SIMILAR POTENTIAL
   EXISTS FOR BOWS OVER NW MO/NERN KS. IN ADDITION TO THE WIND
   THREAT...VERY STRONG LOW LVL SHEAR /0-1 KM BULK SHEAR ON THE ORDER
   OF 40 KT/ EXISTS ACROSS THE REGION...ASSOCIATED WITH INTENSE 30-50
   KT S-SWLY LLJ. THUS...THE POTENTIAL FOR TORNADOES ASSOCIATED WITH
   LEADING EDGE MESO VORTICES EXISTS.
   
   IN ADDITION TO THE SVR WEATHER THREAT...GUST FRONT ORIENTATION IS
   BECOMING ALIGNED PARALLEL TO MEAN UPR LVL FLOW...AND SHORT TERM
   MODEL GUIDANCE INDICATES INTENSE LVL MOISTURE TRANSPORT WILL DEVELOP
   OVER ERN KS INTO NRN MO. THIS SUGGESTS THAT AN ELEVATED THREAT FOR
   TRAINING STORMS PRODUCING VERY HEAVY RAINFALL AND POSSIBLE FLASH
   FLOODING MAY DEVELOP FROM ERN/SRN IA INTO ERN KS GOING THROUGH THE
   NIGHT TIME HRS. ADDITIONAL FOCUS FOR SUSTAINED MESOSCALE FORCING
   WILL BE ALONG AND NORTH OF WARM FRONT/LLJ INTERSECTION OVER SWRN WI.
   NUMEROUS STORMS DEVELOPING WITHIN THIS REGIME WILL BE ADVECTED NEWD
   INTO WI...LEADING TO HEAVY RAINFALL THREAT AS WELL.
   
   ..GARNER.. 04/27/2009
   
   
   ATTN...WFO...MKX...DVN...ARX...SGF...DMX...EAX...OAX...TOP...
   ICT...
   
   LAT...LON   38059747 40209557 40889448 43199240 43188960 38059458
               38059747