MESOSCALE DISCUSSION 0596
   NWS STORM PREDICTION CENTER NORMAN OK
   0353 PM CDT TUE APR 26 2011
   
   AREAS AFFECTED...NRN IND...SRN LOWER MI
   
   CONCERNING...TORNADO WATCH 216...
   
   VALID 262053Z - 262200Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 216 CONTINUES.
   
   AT LEAST AN ISOLATED SEVERE THREAT SHOULD COMMENCE BY 22Z WITHIN AN
   AXIS OF PERSISTENT ISOLATED TSTM ACTIVITY STRETCHING FROM NEAR THE
   LK MI SHORE IN SWRN MI SWD INTO NWRN IND. HEATING CONTINUES
   DOWNSTREAM OF THIS AXIS WHICH WILL RESULT IN FURTHER DESTABILIZATION
   /ALBEIT REMAINING WEAK/. LOW/MID-LEVEL SHEAR WILL REMAIN QUITE
   STRONG WITH 0-1 KM SRH AROUND 200-300 M2/S2 AS SAMPLED BY WOLCOTT
   IND PROFILER AND AREA VWP DATA. AS SUCH...PROPENSITY FOR LOW-LEVEL
   ROTATION WILL EXIST WITH ANY SUSTAINED CELL WITH ATTENDANT THREATS
   FOR AN ISOLATED TORNADO/HAIL. GIVEN THE CONTINUED NEWD PIVOTING OF
   THE WRN GREAT LAKES SHORT WAVE TROUGH...CU FIELD HAS STRUGGLED TO
   INCREASE SWWD OF ONGOING ACTIVITY IN NWRN IND. IF THIS TREND
   PERSISTS...ANY SEVERE THREAT APPEARS HIGHLY CONDITIONAL ACROSS
   PORTIONS OF E-CNTRL IL INTO CNTRL IND.
   
   ..GRAMS.. 04/26/2011
   
   
   ATTN...WFO...DTX...IWX...GRR...IND...LOT...
   
   LAT...LON   41778494 40478577 40278665 40418730 41078720 42248654
               43188547 43178490 42978441 42708434 41778494