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670 

WWUS20 KWNS 172031

SEL5

SPC WW 172031

COZ000-KSZ000-NEZ000-WYZ000-180400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 445

NWS STORM PREDICTION CENTER NORMAN OK

330 PM CDT WED JUN 17 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF NORTHEAST COLORADO

       PARTS OF NORTHWEST KANSAS

       PARTS OF SOUTHWEST NEBRASKA INCLUDING SOUTHERN PANHANDLE

       PARTS OF SOUTHEAST WYOMING



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 330 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 3 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 100 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 10 MILES WEST NORTHWEST OF

FORT COLLINS COLORADO TO 50 MILES SOUTH SOUTHEAST OF BROKEN BOW

NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 439...WW 440...WW

441...WW 442...WW 443...



DISCUSSION...SEVERE THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY FROM

THE LOW LEVEL CYCLONIC CIRCULATION VICINITY DEN ENEWD ACROSS WATCH

ALONG FRONTAL ZONE IN SWRN NEB.  WITH A VERY TO EXTREMELY UNSTABLE

AIR MASS AND FAVORABLE SHEAR IN PLACE...SUPERCELLS SHOULD DEVELOP

RAPIDLY.  TORNADOES AND VERY LARGE HAIL WILL BE ASSOCIATED WITH THE

SUPERCELLS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 24030.





...HALES

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