WATCHES: Severe Thunderstorm Watch Number 617

WWUS20 KWNS 050320
SEL7
SPC WW 050320
IAZ000-MNZ000-050800-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 617
NWS STORM PREDICTION CENTER NORMAN OK
1020 PM CDT TUE SEP 4 2012

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

NORTHERN IOWA
SOUTHERN MINNESOTA

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1020 PM
UNTIL 300 AM CDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
STATUTE MILES EAST AND WEST OF A LINE FROM MANKATO MINNESOTA TO
25 MILES SOUTH SOUTHEAST OF FORT DODGE IOWA. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU7).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 614...WW 615...WW 616...

DISCUSSION...ORGANIZED MCS WILL CONTINUE TO POSE A THREAT FOR MAINLY
ISOLATED DAMAGING WIND AND LARGE HAIL NEXT FEW HOURS AS IT CONTINUES
THROUGH NRN IA AND SRN MN THROUGH THE EARLY MORNING. SEVERE THREAT
WILL BE SUPPORTED IN PART BY A SSWLY LLJ FROM MODERATELY UNSTABLE
WARM SECTOR AND 40 KT 0-6 KM SHEAR.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 27035.


...DIAL

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