

000 

WWUS20 KWNS 232022

SEL0

SPC WW 232022

NMZ000-TXZ000-240400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 70

NWS STORM PREDICTION CENTER NORMAN OK

320 PM CDT FRI MAR 23 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EXTREME EASTERN NEW MEXICO

       FAR WEST AND SOUTHWEST TEXAS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 320 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 2.5 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 5 MILES SOUTH SOUTHEAST OF

MARFA TEXAS TO 40 MILES NORTHEAST OF CANNON AFB NEW MEXICO.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 69...



DISCUSSION...STORMS ARE INCREASING OVER ERN NM WITHIN WW 63 AND OVER

SERN NM/SWRN TX IN ADVANCE OF VIGOROUS UPPER SYSTEM BEGINNING TO

TURN NEWD TOWARD SWRN NM.  LOW LEVEL SELY WINDS HAVE MAINTAINED

MOISTURE FIELD INTO ERN NM/WRN TX WHERE SURFACE DEW POINTS ARE IN

THE 50S TO LOWER 60S...AND STEEP LAPSE RATES HAVE CONTRIBUTED TO

MLCAPE OF 1000-2000 J/KG. STRONG SSWLY FLOW ALOFT IS RESULTING IN

SUFFICIENT DEEP LAYER SHEAR TO SUPPORT SUPERCELL STORMS...AND

DEVELOPING LLJ BY LATE THIS AFTERNOON/EVENING OVER FAR WRN TX WILL

ENHANCE POTENTIAL FOR A FEW TORNADOES TO DEVELOP. ACTIVITY WILL

GRADUALLY DEVELOP EWD/NEWD WITH TIME AS THE UPPER LOW ACCELERATES

NEWD THIS EVENING.



AVIATION...TORNADOES AND 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 21040.





...WEISS

