

000 

WWUS20 KWNS 011904

SEL2

SPC WW 011904

OKZ000-TXZ000-020200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 322

NWS STORM PREDICTION CENTER NORMAN OK

205 PM CDT FRI JUN 1 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST OKLAHOMA

       NORTHWEST TEXAS AND THE TEXAS SOUTH PLAINS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 205 PM UNTIL 900

PM CDT.



TORNADOES...HAIL TO 3 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 45 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 75 MILES WEST OF PLAINVIEW

TEXAS TO 5 MILES NORTHEAST OF WICHITA FALLS TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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 321...



DISCUSSION...SURFACE-BASED CONVECTION WILL INCREASE IN

COVERAGE/INTENSITY ALONG A N E-W OUTFLOW BOUNDARY FROM THE SRN TX

PANHANDLE INTO SW OK.  MID LEVEL FLOW IS A LITTLE WEAK FOR

LONG-LIVED TORNADIC SUPERCELLS...BUT ENHANCED LOW-LEVEL

SHEAR/MOISTURE ALONG THE BOUNDARY MAY SUPPORT A COUPLE OF TORNADOES

WITH HEAVY PRECIPITATION TYPE SUPERCELLS THIS AFTERNOON.

OTHERWISE...VERY STEEP MID LEVEL LAPSE RATES AND MLCAPE NEAR 3000

J/KG WILL SUPPORT A THREAT FOR VERY LARGE HAIL WITH THE MORE INTENSE

STORMS...AND DAMAGING WINDS AS STORM MERGERS RESULT IN SOME UPSCALE

GROWTH INTO LARGER CONVECTIVE CLUSTERS LATER THIS AFTERNOON/EVENING.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

600. MEAN STORM MOTION VECTOR 28015.





...THOMPSON

