

000 

WWUS20 KWNS 222255

SEL8

SPC WW 222255

NMZ000-TXZ000-230500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 68

NWS STORM PREDICTION CENTER NORMAN OK

555 PM CDT THU MAR 22 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST NEW MEXICO

       WEST AND SOUTHWEST TEXAS



EFFECTIVE THIS THURSDAY AFTERNOON FROM 555 PM UNTIL MIDNIGHT 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF

CHILDRESS TEXAS TO 40 MILES SOUTH SOUTHWEST OF MARFA TEXAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...SCATTERED THUNDERSTORMS ARE INCREASING OVER SOUTHEAST

NM AND WEST TX.  THIS ACTIVITY WILL LIKELY INTENSIFY FURTHER DURING

THE EVENING...WITH A RISK OF HAIL AND DAMAGING WINDS IN STRONGER

CELLS.  CLOUD COVER HAS LIMITED DAYTIME HEATING AND DESTABILIZATION.

 HOWEVER...SUFFICIENT DEEP LAYER VERTICAL SHEAR AND WEAK CAP WILL

PROMOTE SCATTERED COVERAGE OF ORGANIZED MULTICELL OR ISOLATED

SUPERCELL STORMS.



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 23030.





...HART

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