144
WWUS20 KWNS 291145
SEL0
SPC WW 291145
OKZ000-291700-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 780
NWS STORM PREDICTION CENTER NORMAN OK
645 AM CDT THU OCT 29 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PARTS OF CENTRAL AND EASTERN OKLAHOMA
EFFECTIVE THIS THURSDAY MORNING FROM 645 AM UNTIL NOON CDT.
HAIL TO 0.5 INCH 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 60
STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH
NORTHEAST OF BARTLESVILLE OKLAHOMA TO 10 MILES SOUTH SOUTHEAST OF
DURANT OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
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.
OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
TORNADO WATCH NUMBER 778...TORNADO WATCH NUMBER 779. WATCH NUMBER
778 779 WILL NOT BE IN EFFECT AFTER 645 AM CDT.
DISCUSSION...QLCS WITH EMBEDDED BOWING STRUCTURES IS EXPECTED TO
CONTINUE EWD ACROSS THE ERN HALF OF OK THIS MORNING. WHILE VERTICAL
SHEAR REMAINS QUITE STRONG...COMBINATION OF PACIFIC FRONT AND
CONVECTIVE OUTFLOW SHOULD SERVE TO MAINTAIN AN OUTFLOW-DOMINANT...
LINEAR CONVECTIVE MODE WITH DAMAGING WIND GUSTS BEING THE PRIMARY
SEVERE WEATHER THREAT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 21040.
...MEAD/IMY
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