WATCHES: Severe Thunderstorm Watch Number 109

WWUS20 KWNS 132217
SEL9
SPC WW 132217
ARZ000-MOZ000-OKZ000-TXZ000-140600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 109
NWS STORM PREDICTION CENTER NORMAN OK
415 PM CST THU MAR 13 2008

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

WESTERN ARKANSAS
SOUTHWEST MISSOURI
EASTERN OKLAHOMA
NORTHEAST TEXAS

EFFECTIVE THIS THURSDAY AFTERNOON FROM 415 PM UNTIL MIDNIGHT CST.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES WEST
NORTHWEST OF MONETT MISSOURI TO 45 MILES SOUTHEAST OF PARIS
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...SLIGHTLY ELEVATED TSTMS...INCLUDING POSSIBLE
SUPERCELLS...EXPECTED TO DEVELOP/INCREASE IN COVERAGE OVER WW AREA
THROUGH LATE TONIGHT AS WRN OK/NW TX MID-LEVEL VORT CONTINUES EWD.
ASSOCIATED MID-LEVEL COLD ADVECTION...AND GRADUALLY INCREASING
LOW-LEVEL MOISTURE... SUGGEST THAT SUFFICIENT DESTABILIZATION WILL
OCCUR TO EVENTUALLY SUPPORT NEAR-SFC-BASED STORMS. COUPLED WITH EML
SWEEPING EWD ON S SIDE OF VORT...SOME STORMS COULD YIELD LARGE HAIL
AND...POSSIBLY...HIGH WINDS.

AVIATION...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 450. MEAN STORM
MOTION VECTOR 25030.

..CORFIDI

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