Wednesday, October 22, 2008

WATCHES: Severe Thunderstorm Watch Number 921

WWUS20 KWNS 220458
SEL1
SPC WW 220458
KSZ000-OKZ000-TXZ000-220900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 921
NWS STORM PREDICTION CENTER NORMAN OK
1200 AM CDT WED OCT 22 2008

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

CENTRAL AND SOUTH CENTRAL KANSAS
NORTHWEST OKLAHOMA AND THE EASTERN OKLAHOMA PANHANDLE
THE NORTHEAST TEXAS PANHANDLE

EFFECTIVE THIS WEDNESDAY MORNING FROM MIDNIGHT UNTIL 400 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH
NORTHEAST OF RUSSELL KANSAS TO 15 MILES EAST SOUTHEAST OF GAGE
OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 920...

DISCUSSION...LINE OF STORMS ALONG COLD FRONT WILL CONTINUE TO SURGE
ESEWD ACROSS SW/CENTRAL KS...WITH SOME DEVELOPMENT SWD TOWARD NW OK
AND THE TX PANHANDLE. THOUGH INSTABILITY WILL GRADUALLY DIMINISH
OVERNIGHT AND WITH EWD EXTENT...A WELL-DEVELOPED COLD POOL AND
SEVERAL MEASURED SEVERE GUSTS SUGGEST A CONTINUE WIND DAMAGE THREAT
FOR AT LEAST THE NEXT FEW HOURS. FARTHER NE INTO CENTRAL
KS...CONVECTION WILL CONTINUE TO FORM ALONG THE WARM FRONT AND AT
THE INTERSECTION OF THIS BOUNDARY WITH THE SQUALL LINE. LARGE HAIL
AND ISOLATED DAMAGING GUSTS WILL BE THE MAIN SEVERE THREATS.

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 450. MEAN STORM
MOTION VECTOR 28035.


...THOMPSON

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