WATCHES: Severe Thunderstorm Watch Number 139

WWUS20 KWNS 112018
SEL9
SPC WW 112018
NMZ000-TXZ000-120400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 139
NWS STORM PREDICTION CENTER NORMAN OK
320 PM CDT SAT APR 11 2009

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

SOUTHEAST NEW MEXICO
SOUTHWEST INTO WEST CENTRAL TEXAS

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 320 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 70
STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES NORTH
NORTHEAST OF HOBBS NEW MEXICO TO 20 MILES EAST OF DRYDEN TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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...LARGE SCALE ASCENT WILL CONTINUE TO INCREASE STRONG TO
SEVERE THUNDERSTORM DEVELOPMENT ACROSS WW THIS EVENING AHEAD OF
UPPER LOW NOW MOVING INTO THE SRN ROCKIES. MOISTENING SELY LOW
LEVEL FLOW SHOULD SUPPORT AXIS OF MODEST INSTABILITY...WITH
DESTABILIZATION SPREADING ENEWD WITH TIME. SHEAR IS MORE THAN
ADEQUATE FOR SUPERCELLS...ALTHOUGH PRIMARY THREAT WILL BE LARGE
HAIL. ISOLATED DAMAGING WINDS AND POSSIBLY A TORNADO MAY ACCOMPANY
SURFACE-BASED STORMS...ESPECIALLY IN SRN PORTIONS OF WW INTO THE
EARLY EVENING.

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 450. MEAN STORM
MOTION VECTOR 22030.

...EVANS

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