Thursday, April 17, 2008

WATCHES: Severe Thunderstorm Watch Number 206

WWUS20 KWNS 180158
SEL6
SPC WW 180158
OKZ000-TXZ000-180900-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 206
NWS STORM PREDICTION CENTER NORMAN OK
900 PM CDT THU APR 17 2008

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

SOUTHEAST OKLAHOMA
CENTRAL AND EAST TEXAS

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 900 PM
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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHWEST OF
TEMPLE TEXAS TO 40 MILES NORTHEAST OF PARIS TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

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 204...WW 205...

DISCUSSION...TSTMS EXPECTED TO CONTINUE ALONG SE-MOVING COLD FRONT
OVER CNTRL TX THROUGH EARLY FRIDAY...AIDED BY INCREASING UPR
DIFFLUENCE/UVV AHEAD OF W TX UPR TROUGH...AND NOCTURNAL
STRENGTHENING OF SLY LLJ. WARM SECTOR CAP SUGGESTS THAT STORMS
SHOULD BE CONFINED TO FRONT...WITH POTENTIAL FOR HIGH WIND IN
ADDITION TO SVR HAIL FROM QUASI-LINEAR LINE SEGMENTS.

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 26035.


...CORFIDI

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