Monday, April 30, 2007

WATCHES: Severe Thunderstorm Watch Number 201

WWUS20 KWNS 300746
SEL1
SPC WW 300746
TXZ000-301300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 201
NWS STORM PREDICTION CENTER NORMAN OK
245 AM CDT MON APR 30 2007

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

THE BIG BEND REGION AND THE HILL COUNTRY OF TEXAS

EFFECTIVE THIS MONDAY MORNING FROM 245 AM UNTIL 800 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 65
STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES EAST
NORTHEAST OF JUNCTION TEXAS TO 65 MILES SOUTH SOUTHEAST OF DEL
RIO TEXAS. 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...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 200. WATCH NUMBER 200 WILL NOT BE IN EFFECT
AFTER 245 AM CDT.

DISCUSSION...SRN EXTENT OF BROADER CENTRAL TX MCS WILL LIKELY
MAINTAIN THREATS OF LARGE HAIL AND ISOLATED DAMAGING WINDS OVERNIGHT
ACROSS WW. AREA WILL REMAIN WITHIN FAVORABLE SHEAR AND MODERATE
INSTABILITY FOR ORGANIZED STORMS. IN ADDITION...PERSISTENT LLJ AND
FEED OF ABUNDANT MOISTURE WILL ALSO MAINTAIN A THREAT OF HEAVY
RAINFALL.

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.


..EVANS

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