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WWUS20 KWNS 051035

SEL9

SPC WW 051035

COZ000-KSZ000-NEZ000-051700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 459

NWS STORM PREDICTION CENTER NORMAN OK

435 AM MDT THU JUN 5 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN AND SOUTH-CENTRAL COLORADO

       WESTERN KANSAS

       SOUTHWESTERN AND CENTRAL NEBRASKA



EFFECTIVE THIS THURSDAY MORNING FROM 435 AM UNTIL 1100 AM MDT.



HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST

SOUTHWEST OF SPRINGFIELD COLORADO TO 45 MILES NORTH NORTHEAST OF

NORTH PLATTE NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 458...



DISCUSSION...STRENGTHENING LARGE SCALE ASCENT AHEAD OF PROGRESSIVE

SWRN CONUS UPPER LOW WILL SUPPORT INCREASING CONVECTIVE COVERAGE

THROUGH REMAINDER FORENOON HOURS OVER THIS REGION...W OF SFC FRONTAL

ZONE.  LARGE HAIL WILL BE PRIMARY THREAT AS ELUCIDATED IN MORE

DETAIL IN MESOSCALE DISCUSSION 1219.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 21030.





...EDWARDS/CORFIDI

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