Thursday, April 22, 2010

WATCHES: Tornado Watch Number 75

WWUS20 KWNS 221934
SEL5
SPC WW 221934
OKZ000-TXZ000-230300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 75
NWS STORM PREDICTION CENTER NORMAN OK
235 PM CDT THU APR 22 2010

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

PARTS OF WESTERN OKLAHOMA
LARGE PART OF TEXAS PANHANDLE

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 235 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES EAST NORTHEAST OF
GUYMON OKLAHOMA TO 75 MILES SOUTHEAST OF LUBBOCK TEXAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 74...

DISCUSSION...DRY LINE HAS PROGRESSED INTO WRN PORTIONS OF TX/OK
PANHANDLE AND WILL BE FOCUS FOR SEVERE THUNDERSTORM DEVELOPMENT THRU
THE AFTERNOON. IN ADDITION MORE DISCRETE STORMS ARE LIKELY VICINITY
CAP ROCK WHERE GREATER MOISTURE/INSTABILITY COUPLED WITH BACKED
BOUNDARY LAYER FLOW. SUPERCELLS WILL BECOME PRIMARY MODE DURING
AFTERNOON WITH INCREASING THREAT OF TORNADOES AND VERY LARGE
HAIL...PARTICULARLY ANY DISCRETE STORMS THAT DEVELOP.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 23030.


..HALES

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