

000 

WWUS20 KWNS 251940

SEL2

SPC WW 251940

WIZ000-260100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 232

NWS STORM PREDICTION CENTER NORMAN OK

240 PM CDT FRI APR 25 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN INTO CENTRAL WISCONSIN



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 240 PM UNTIL 800

PM 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF CAMP DOUGLAS

WISCONSIN TO 20 MILES WEST SOUTHWEST 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...CONTINUE...WW 231...



DISCUSSION...THUNDERSTORMS WILL CONTINUE INCREASING/DEVELOPING

ACROSS WW THIS EVENING AHEAD OF STRONG MID/UPPER LEVEL TROUGH AND

ASSOCIATED SURFACE COLD FRONT MOVING INTO THE NRN MS RIVER VALLEY.

SURFACE LOW WILL LIFT NWD INTO NWRN WI THROUGH THE EVENING WITH

TRAILING WARM FRONT SHIFTING NORTH INTO CENTRAL WI.  THIS WILL

SUPPORT MARGINAL INSTABILITY WITHIN SUFFICIENT LOW/DEEP LAYER SHEAR

FOR A FEW SUPERCELLS AND SMALL LINES OVER SRN AND CENTRAL WI...WITH

ATTENDANT THREATS OF ISOLATED TORNADOES...LARGE HAIL AND/OR ISOLATED

DAMAGING WINDS.



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

400. MEAN STORM MOTION VECTOR 23030.





...EVANS

