

000 

WWUS20 KWNS 080043

SEL2

SPC WW 080043

IAZ000-ILZ000-WIZ000-080800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 482

NWS STORM PREDICTION CENTER NORMAN OK

740 PM CDT SAT JUN 7 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       A LARGE PART OF IOWA

       PARTS OF NORTHERN ILLINOIS

       PARTS OF SOUTHERN WISCONSIN



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 740 PM

UNTIL 300 AM CDT.



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

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTHWEST OF FORT

DODGE IOWA TO 45 MILES NORTHEAST OF JANESVILLE WISCONSIN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 478...TORNADO WATCH NUMBER 479. WATCH NUMBER 478 479

WILL NOT BE IN EFFECT AFTER 740 PM CDT. CONTINUE...WW 480...WW

481...



DISCUSSION...WITH LOW LEVEL JET EXPECTED TO INCREASE TO 50-60KT AND

AVAILABILITY OF VERY MOIST AND UNSTABLE AIR...CONDITIONS EXPECTED TO

REMAIN FAVORABLE FOR SUPERCELLS MUCH OF THE NIGHT ACROSS THE WATCH

AREA.  ONGOING SEVERE WILL CONTINUE AND TRANSITION INTO ONE OR MORE

MCS/S WITH THREAT OF DAMAGING WINDS INCREASING. TORNADOS WILL BE

POSSIBLE WITH ANY SUPERCELL GIVEN THE HIGH CAPE AND SHEAR IN PLACE

IN THE WARM SECTOR.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

600. MEAN STORM MOTION VECTOR 24030.





...HALES

