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000 

WWUS20 KWNS 040005

SEL3

SPC WW 040005

COZ000-KSZ000-NEZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 803

NWS STORM PREDICTION CENTER NORMAN OK

605 PM MDT SUN AUG 3 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST COLORADO

       FAR NORTHWEST KANSAS

       WESTERN AND CENTRAL NEBRASKA



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 605 PM UNTIL

100 AM MDT.



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 85

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTHWEST

OF SIDNEY NEBRASKA TO 10 MILES EAST OF BURWELL NEBRASKA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 801...WW 802...



DISCUSSION...TSTMS NOW FORMING/SPREADING ENE FROM NE CO/WRN NEB

PANHANDLE EXPECTED TO INCREASE IN STRENGTH AND COVERAGE THROUGH THE

EVENING...LIKELY MERGING INTO A QLCS.  FORWARD PROPAGATION TOWARD

THE ENE WILL BE SUPPORTED BY ENELY LOW-LVL FLOW BENEATH WSW MID LVL

WINDS...AND BY ASSOCIATED UPR DISTURBANCE NOW IN WY /REF MCD 2018/.

MAIN THREAT SHOULD BE DMGG WINDS FROM EMBEDDED SMALL SCALE BOWS

ALONG AND N OF STALLING SFC FRONT.



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 25025.





...CORFIDI

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