MESOSCALE DISCUSSION 1231
   NWS STORM PREDICTION CENTER NORMAN OK
   0658 AM CDT FRI JUN 19 2009
   
   AREAS AFFECTED...EASTERN IA/FAR SOUTHERN WI/NORTHERN IL
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 191158Z - 191300Z
   
   A WATCH COULD BE NEEDED SOON FOR PORTIONS OF EASTERN IA/NORTHERN IL
   AND PERHAPS FAR SOUTHERN WI.
   
   WELL-SUSTAINED SMALL/INTENSE MCS WITH HISTORY OF WIND DAMAGE
   CONTINUES TO RACE EASTWARD AT AROUND 45 KT JUST NORTH OF I-80 IN
   EASTERN IA...IN TAMA COUNTY IA AS OF 1145Z. AN 82 KT GUST WAS
   RECENTLY MEASURED /RWIS/ NEAR MARHALLTOWN IA. AT LEAST THE IMMEDIATE
   DOWNSTREAM ENVIRONMENT ACROSS EASTERN IA APPEARS FAVORABLE FOR A
   CONTINUED DAMAGING WIND THREAT OVER THE NEXT 1-2 HOURS...AND SUCH A
   THREAT COULD VERY WELL CONTINUE INTO NORTHERN IL/PERHAPS FAR
   SOUTHERN WI AS THE MORNING WEARS ON.
   
   ..GUYER.. 06/19/2009
   
   
   ATTN...WFO...LOT...MKX...DVN...ARX...DMX...
   
   LAT...LON   41229216 42879212 42718918 41478817 41229216