

386 

WWUS20 KWNS 141745

SEL1

SPC WW 141745

NMZ000-TXZ000-150100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 171

NWS STORM PREDICTION CENTER NORMAN OK

1245 PM CDT FRI MAY 14 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHEAST NEW MEXICO

       LARGE PART OF SOUTHWEST TEXAS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL

800 PM CDT.



TORNADOES...HAIL TO 4 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF ROSWELL NEW

MEXICO TO 35 MILES EAST SOUTHEAST OF DEL RIO TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU1).



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...THIS TORNADO WATCH REPLACES SEVERE

THUNDERSTORM WATCH NUMBER 169. WATCH NUMBER 169 WILL NOT BE IN

EFFECT AFTER 1245 PM CDT. CONTINUE...WW 170...



DISCUSSION...AIR MASS HAS BECOME VERY UNSTABLE ACROSS THE WATCH AREA

WITH MLCAPES AOA 3000 J/KG.  WITH VEERING SHEAR PROFILES AND

APPROACH OF MID LEVEL TROUGH...SUPERCELLS ARE EXPECTED TO RAPIDLY

DEVELOP.  IN ADDITION TO VERY LARGE HAIL...TORNADOES WILL BE

POSSIBLE WITH ANY SUPERCELL.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 27015.





...HALES

