

000 

WWUS20 KWNS 050002

SEL5

SPC WW 050002

IAZ000-ILZ000-INZ000-050600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 455

NWS STORM PREDICTION CENTER NORMAN OK

700 PM CDT WED JUN 4 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF EASTERN IOWA

       LARGE PART OF NORTHERN ILLINOIS

       PARTS OF NORTHERN INDIANA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 700 PM

UNTIL 100 AM CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST SOUTHWEST OF

MOLINE ILLINOIS TO 50 MILES EAST NORTHEAST OF LAFAYETTE INDIANA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 448...WW 451...WW

452...WW 453...WW 454...



DISCUSSION...THUNDERSTORMS WILL CONTINUE TO INCREASE IN THE LIFT

ACROSS THE WARM FRONT THRU THE WATCH.  WITH VERY MOIST AND

MODERATELY UNSTABLE AIR MASS COUPLED WITH FAVORABLE VEERING SHEAR

PROFILES...SUPERCELLS  ARE EXPECTED.  DAMAGING WINDS/LARGE HAIL

ALONG WITH POSSIBLE TORNADOES WILL BE ASSOCIATED WITH SUPERCELLS AS

THEY MOVE NEWD ACROSS THE WATCH AREA.



AVIATION...TORNADOES AND 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

500. MEAN STORM MOTION VECTOR 25030.





...HALES

