Tornado Watch 478

Issued

Jun 7, 2008, 12:17 PM CDT (17:17 UTC)

Expired

Jun 7, 2008, 8:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Two or more tornadoes

60%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

40%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1260Jun 7, 10:35 AM CDT
• Mesoscale Discussion 1261Jun 7, 12:10 PM CDT
• Mesoscale Discussion 1263Jun 7, 1:35 PM CDT
• Mesoscale Discussion 1266Jun 7, 3:29 PM CDT
• Mesoscale Discussion 1268Jun 7, 6:34 PM CDT

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

Tornado Watches in Iowa, 2008Tornado Watches in Wisconsin, 2008Tornado Watches in Minnesota, 2008Every tornado watch in 2008

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.