WATCHES: Tornado Watch Number 702

WWUS20 KWNS 221946
SEL2
SPC WW 221946
OKZ000-TXZ000-230300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 702
NWS STORM PREDICTION CENTER NORMAN OK
245 PM CDT FRI OCT 22 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

SOUTHWEST AND SOUTH-CENTRAL OKLAHOMA
NORTHWEST TEXAS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 2 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 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 130 MILES WEST SOUTHWEST OF
WICHITA FALLS TEXAS TO 75 MILES EAST 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.

DISCUSSION...TSTMS DEVELOPING INVOF DRYLINE/OUTFLOW BOUNDARY TRIPLE
POINT ARE EXPECTED TO INCREASE IN COVERAGE AND INTENSITY THIS
AFTERNOON WITHIN A MODERATELY UNSTABLE AIR MASS WITH MLCAPE OF
1000-1500 J/KG. SOME BOUNDARY LAYER DRYING HAS BEEN NOTED IN OPEN
WARM SECTOR WHERE DEWPOINTS HAVE MIXED IN THE UPPER 50S.
HOWEVER...LOCAL ENVIRONMENT INVOF OUTFLOW BOUNDARY IS LIKELY
CHARACTERIZED BY COOLER AND MORE MOIST CONDITIONS...YIELDING LOWER
LCL HEIGHTS. WHEN COUPLED WITH LOCALLY BACKED NEAR-SURFACE FLOW AND
40-50 KT OF DEEP-LAYER SHEAR...SETUP APPEARS FAVORABLE FOR THE
DEVELOPMENT OF A FEW SUPERCELLS CAPABLE OF LARGE HAIL AND A COUPLE
TORNADOES.

AVIATION...TORNADOES AND 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 24030.

...MEAD

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