

245 

WWUS20 KWNS 080320

SEL4

SPC WW 080320

TXZ000-081100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 874

NWS STORM PREDICTION CENTER NORMAN OK

920 PM CST MON NOV 7 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WEST TEXAS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 920 PM UNTIL

500 AM CST.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 75 MILES NORTH NORTHWEST OF

ABILENE TEXAS TO 105 MILES SOUTHWEST OF SAN ANGELO TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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 871...WW 873...



DISCUSSION...TSTMS EXPECTED TO CONTINUE FORMING ALONG N-S DRY LINE

IN W TX IN THE NEXT HOUR OR SO...WITH MORE WIDESPREAD DEVELOPMENT

LIKELY AS PACIFIC COLD FRONT NOW PASSING INK CONTINUES EWD AND

OVERTAKES THE BOUNDARY.  OTHER STORMS MAY DEVELOP SW ALONG STALLING

OUTFLOW BOUNDARY ASSOCIATED WITH THE NW TX SQLN. STORMS THROUGHOUT

THE REGION WILL BE ASSOCIATED BY INCREASING UPR DIVERGENCE

ASSOCIATED WITH GRAZING INFLUENCE OF NM UPR TROUGH.  STRENGTHENING

WIND FIELD AND LOW LVL MOISTURE RETURN AHEAD OF THE TROUGH MAY

SUPPORT A FEW SEMI-DISCRETE SUPERCELLS POSING A RISK FOR LARGE HAIL

AND TORNADOES BEFORE ACTIVITY EVOLVES INTO A SQLN.  EMBEDDED

SUPERCELLS/LEWPS IN THE LINE MAY CONTINUE TO POSE A RISK FOR SVR

WIND...HAIL...AND PERHAPS SHORT-LIVED TORNADOES THROUGH EARLY TUE

MORNING.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24035.





...CORFIDI

