MESOSCALE DISCUSSION 1508
   NWS STORM PREDICTION CENTER NORMAN OK
   0136 AM CDT FRI JUL 10 2009
   
   AREAS AFFECTED...FAR SRN MN/FAR NRN INTO NERN-EAST CENTRAL IA/FAR
   SWRN WI
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 568...569...
   
   VALID 100636Z - 100700Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
   568...569...CONTINUES.
   
   RECENT RADAR TRENDS SUGGEST THAT THE OVERALL SEVERE WEATHER THREAT
   HAS ALL BUT ENDED ACROSS WW/S 569 AND 569 AS STRONGER STORMS ARE
   CURRENTLY MOVING ESEWD INTO NERN IA.  WW 568 WILL BE ALLOWED TO
   EXPIRE AS SCHEDULED AT 07Z.
   
   IF A BOWING STRUCTURE BECOMES MORE ORGANIZED/SUSTAINED...THEN A
   WATCH MIGHT BE NEEDED INTO NERN/EAST CENTRAL IA AND ADJACENT PARTS
   OF FAR SWRN WI/FAR NWRN IL WITH AN ATTENDANT THREAT FOR DAMAGING
   WINDS AND HAIL.
   
   0545Z IR SATELLITE IMAGE INDICATED COOLING CLOUD TOPS OVER FAR SOUTH
   CENTRAL MN AND ADJACENT NRN IA...WHILE RADAR TRENDS SUGGEST THE
   STRONGEST STORMS ARE BEGINNING TO TURN MORE S OF EAST WITH A LINEAR
   STRUCTURE/BOWING SIGNATURE POTENTIALLY DEVELOPING.  A MORE SEWD
   TRACK IS POSSIBLE WITH THE ONGOING STORMS MOVING SEWD ALONG AN
   INSTABILITY GRADIENT EXTENDING FROM NWRN-EAST CENTRAL/SERN IA.  A
   25-30 KT SWLY LLJ EXTENDING INTO IA IS LIKELY FUELING THIS ONGOING
   TSTM COMPLEX WITH A RESERVOIR OF VERY STRONG INSTABILITY RESIDING
   OVER THE MID/LOWER MO RIVER VALLEY.  THIS LLJ WILL VEER TO WLY BY
   12Z THIS MORNING SUGGESTING THIS MCS SHOULD TRACK SEWD REACHING EAST
   CENTRAL IA BETWEEN 08-10Z.
   
   ..PETERS.. 07/10/2009
   
   
   ATTN...WFO...MKX...DVN...ARX...MPX...DMX...FSD...
   
   LAT...LON   43139081 42649022 41939007 41289109 42079240 42929375
               43089480 43629501 43899457 43969394 43839273 43579124
               43139081