WATCHES: Severe Thunderstorm Watch Number 387

WWUS20 KWNS 132043
SEL7
SPC WW 132043
NMZ000-TXZ000-140400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 387
NWS STORM PREDICTION CENTER NORMAN OK
340 PM CDT WED JUN 13 2012

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

SOUTHEAST NEW MEXICO
WESTERN AND SOUTHWEST TEXAS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 340 PM UNTIL
1100 PM 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 70
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES SOUTHEAST OF
MARFA TEXAS TO 55 MILES NORTH NORTHEAST OF ROSWELL NEW MEXICO.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 386...

DISCUSSION...CONSIDERABLE MIDLEVEL CONVECTION IS OCCURRING THIS
AFTERNOON ABOVE THE CAP WITHIN A ZONE OF ENHANCED FORCING FOR ASCENT
ATTENDANT TO SRN ROCKIES SHORTWAVE TROUGH. AMBIENT BOUNDARY LAYER
REMAINS RATHER MOIST FOR THE ELEVATION WITH DEWPOINTS IN THE 50S TO
LOWER 60S. WHEN COUPLED WITH THE EML/STEEP MIDLEVEL LAPSE
RATES...ENVIRONMENT IS MODERATE TO STRONGLY UNSTABLE WITH MLCAPE
ESTIMATED UPWARDS OF 2000-3000 J/KG. THIS INSTABILITY COINCIDES
WITH A CORRIDOR OF 45-55 KT EFFECTIVE BULK SHEAR...INDICATING A HIGH
LIKELIHOOD FOR SUPERCELLS CAPABLE OF LARGE HAIL AND DAMAGING WINDS
SHOULD ELEVATED STORMS BECOME PROGRESSIVELY ROOTED WITHIN THE
BOUNDARY LAYER.

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 500. MEAN STORM
MOTION VECTOR 29025.


...MEAD

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.