WATCHES: Severe Thunderstorm Watch Number 284

WWUS20 KWNS 090109
SEL4
SPC WW 090109
KSZ000-OKZ000-090700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 284
NWS STORM PREDICTION CENTER NORMAN OK
810 PM CDT THU MAY 8 2008

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

SOUTHERN KANSAS
NORTHERN OKLAHOMA

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 810 PM
UNTIL 200 AM CDT.

HAIL TO 2 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 NORTH AND SOUTH OF A LINE FROM 60 MILES WEST
NORTHWEST OF MEDICINE LODGE KANSAS TO 35 MILES EAST NORTHEAST OF
BARTLESVILLE OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 281. WATCH NUMBER 281 WILL NOT BE IN EFFECT
AFTER 810 PM CDT. CONTINUE...WW 280...WW 282...WW 283...

DISCUSSION...LINEAR MCS IS EXPECTED TO DEVELOP ALONG STRONG COLD
FRONT/OUTFLOW BOUNDARY OVER SWRN KS THIS EVENING AND SPREAD QUICKLY
SEWD ACROSS WW OVERNIGHT ALONG NOSE OF STRENGTHENING SSWLY LLJ.
DAMAGING WINDS AND LARGE HAIL ARE EXPECTED TO ACCOMPANY THESE
STORMS...WHICH SHOULD MOVE INTO SERN KS/NERN OK BEFORE WEAKENING
LATER TONIGHT.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29035.

...EVANS

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