SEL1
SPC WW 122210
NMZ000-TXZ000-130500-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 131
NWS STORM PREDICTION CENTER NORMAN OK
510 PM CDT THU APR 12 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SMALL PART OF EASTERN NEW MEXICO
MUCH OF TEXAS PAN HANDLE
EFFECTIVE THIS THURSDAY AFTERNOON FROM 510 PM UNTIL MIDNIGHT CDT.
HAIL TO 2.5 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 30 MILES NORTH
NORTHEAST OF DALHART TEXAS TO 50 MILES SOUTH SOUTHEAST OF LUBBOCK
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.
DISCUSSION...MOISTURE WILL CONTINUE TO INCREASE NWD ACROSS WATCH
AREA THRU THE EVENING ON STRONG SELY JET. WITH VERY FAVORABLE DEEP
SHEAR AND STEEP LAPSE RATES IN PLACE...THUNDERSTORMS SHOULD DEVELOP
FROM W TO E ACROSS THE WATCH AREA. PRIMARY THREAT WILL BE LARGE
HAIL...PARTICULARLY WITH ANY SUPERCELL THAT DEVELOPS. DAMAGING
DOWNBURSTS ALSO POSSIBLE GIVEN THE STEEP LAPSE RATES AND STRONG
SHEAR PROFILES.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 24030.
..HALES
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