

000 

WWUS20 KWNS 011716

SEL3

SPC WW 011716

ILZ000-INZ000-MIZ000-OHZ000-LMZ000-020000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 443

NWS STORM PREDICTION CENTER NORMAN OK

1220 PM CDT SUN JUL 1 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST ILLINOIS

       NORTHERN AND CENTRAL INDIANA

       EXTREME SOUTHWEST MICHIGAN

       WESTERN OHIO

       LAKE MICHIGAN



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1220 PM UNTIL

700 PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF

VALPARAISO INDIANA TO 40 MILES NORTH NORTHEAST OF DAYTON OHIO.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 442...



DISCUSSION...CONVECTION NEAR CHICAGO COULD PERSIST THROUGH THE

AFTERNOON WITH CELL MERGERS LEADING TO SOME UPSCALE GROWTH AND MCS

FORMATION.  IF THIS OCCURS...THE RISK FOR DAMAGING WINDS WILL

INCREASE...GIVEN THE MODERATELY UNSTABLE ENVIRONMENT ON THE SRN

FRINGE OF THE STRONGER WLY/WNWLY MIDLEVEL FLOW.  OTHERWISE...THE

DAMAGING WIND/HAIL RISK WILL CONTINUE IN THE SHORT TERM ACROSS NE

IL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 29035.





...THOMPSON

