WATCHES: Tornado Watch Number 358

WWUS20 KWNS 071636
SEL8
SPC WW 071636
IAZ000-ILZ000-MIZ000-MNZ000-WIZ000-LSZ000-080300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 358
NWS STORM PREDICTION CENTER NORMAN OK
1135 AM CDT THU JUN 7 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

MUCH OF CENTRAL AND EASTERN IOWA
SMALL PART OF NORTHWEST ILLINOIS
PART OF WESTERN UPPER MICHIGAN
PARTS OF SOUTHEASTERN MINNESOTA
MUCH OF WESTERN AND NORTHERN WISCONSIN
LAKE SUPERIOR

EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1135 AM UNTIL
1000 PM CDT.

..THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 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 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF
KENNEDY WISCONSIN TO 45 MILES SOUTH SOUTHWEST OF OTTUMWA IOWA.
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.

OTHER WATCH INFORMATION...CONTINUE...WW 357...

DISCUSSION...VERY STRONG SHEAR PROFILES IN PLACE ACROSS WATCH WITH
APPROACH OF VIGOROUS UPPER TROUGH AND DEEP SURFACE LOW. AIR MASS
HAS BECOME STRONGLY UNSTABLE AND WEAKLY CAPPED. SUPERCELL
THUNDERSTORMS WILL DEVELOP RAPIDLY ALONG W EDGE OF WATCH WHERE
MOISTURE/INSTABILITY GRADIENT LOCATED. POTENTIAL EXISTS FOR
STRONG/LONG LIVED TORNADOES TO DEVELOP BY MID AFTERNOON ALONG WITH
VERY DAMAGING WINDS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24050.

..HALES

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