Wednesday, September 30, 2009

WATCHES: Severe Thunderstorm Watch Number 750

WWUS20 KWNS 302057
SEL0
SPC WW 302057
KSZ000-OKZ000-TXZ000-010400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 750
NWS STORM PREDICTION CENTER NORMAN OK
400 PM CDT WED SEP 30 2009

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

PARTS OF SOUTHERN KANSAS
PARTS OF WESTERN OKLAHOMA
EASTERN TEXAS PANHANDLE

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL
1100 PM 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 EAST AND WEST OF A LINE FROM 55 MILES NORTH
NORTHWEST OF HUTCHINSON KANSAS TO 80 MILES WEST SOUTHWEST OF
CLINTON OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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.

DISCUSSION...STRONG DOWN SLOPE WARMING HAS EFFECTIVELY REMOVED CAP
ALONG DRY LINE. WITH MOISTURE CONTINUING TO STREAM NW E OF DRY LN
AND APPROACH OF A VERY STRONG UPPER TROUGH AND WIND FIELD...STORMS
EXPECTED TO DEVELOP ALONG AND E OF DRY LINE. PRIMARY THREAT WILL BE
LARGE HAIL AND DAMAGING WINDS AS STORMS MOVE EWD OFF DRY LINE.

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 24035.


...HALES

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