AREAS AFFECTED...NRN IL TO NRN MO
CONCERNING...SEVERE THUNDERSTORM WATCH 258...
VALID 062056Z - 062200Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 258
CONTINUES.
SUMMARY...AN EXPANDING CLUSTER OF SEVERE THUNDERSTORMS SHOULD SPREAD
ACROSS NRN IL INTO NWRN IND OVER THE NEXT FEW HOURS. OTHER ISOLATED
SEVERE THUNDERSTORMS WILL PERSIST SWWD INTO MO AS WELL.
DISCUSSION...MULTIPLE THUNDERSTORM CLUSTERS HAVE EVOLVED ALONG
OUTFLOW BOUNDARY THAT IS DRAPED ACROSS NRN IL...AT TIMES SEVERAL OF
THESE STRUCTURES HAVE EXHIBITED SUPERCELL CHARACTERISTICS. EVEN SO
STORM MERGERS ARE RESULTING IN AN EXPANDING CORRIDOR OF CONVECTION
THAT COULD EVOLVE INTO AN MCS. THIS ACTIVITY SHOULD SPREAD/DEVELOP
SLOWLY ESEWD INTO EXTREME NWRN IND OVER THE NEXT FEW HOURS.
FARTHER SW...ISOLATED THUNDERSTORMS WILL CONTINUE TO DEVELOP ALONG
THE OUTFLOW ACROSS NRN MO.
..DARROW.. 05/06/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LOT...ILX...LSX...DVN...SGF...DMX...EAX...
LAT...LON 40039414 41858759 40138758 38299413 40039414
