

000 

WWUS20 KWNS 071716

SEL8

SPC WW 071716

IAZ000-MNZ000-WIZ000-080100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 478

NWS STORM PREDICTION CENTER NORMAN OK

1215 PM CDT SAT JUN 7 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND NORTHEAST IOWA

       SOUTHEAST MINNESOTA

       SOUTHERN WISCONSIN



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1215 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 55 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST SOUTHWEST OF

FORT DODGE IOWA TO 35 MILES EAST OF OSHKOSH WISCONSIN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...CLUSTERS OF THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS

AFTERNOON OVER NORTHERN IA INTO SOUTH CENTRAL WI.  STORMS WILL

INTERACT WITH VERY MOIST/UNSTABLE AIRMASS...ALONG WITH FAVORABLE LOW

LEVEL AND DEEP LAYER VERTICAL SHEAR.  SUPERCELLS ARE EXPECTED WITH

TORNADOES...HAIL...AND DAMAGING WINDS POSSIBLE.



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 25035.





...HART

