WW 579 SEVERE TSTM OK TX 142305Z – 150600Z
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 579
NWS STORM PREDICTION CENTER NORMAN OK
605 PM CDT TUE AUG 14 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN AND SOUTHERN OKLAHOMA
NORTHERN TEXAS
EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 605 PM
UNTIL 100 AM CDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST OF
ALTUS OKLAHOMA TO 60 MILES EAST SOUTHEAST OF DURANT OKLAHOMA.
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...TSTMS EXPECTED TO PERSIST AND POSSIBLY INCREASE IN
COVERAGE/STRENGTH ACROSS WW AREA THROUGH MID-LATE EVE AS REGION IS
GLANCED BY ASCENT ASSOCIATED WITH KS/MO SHORTWAVE IMPULSE.
FORWARD-PROPAGATING DEVELOPMENT/OCCASIONAL BOWING STRUCTURES MAY BE
FOSTERED IN SW OK BY ELY LOW LVL FLOW INVOF SWD-MOVING W-E BOUNDARY.
MORE WDLY SCTD ACTIVITY WITH A POTENTIAL FOR LOCALLY DMGG WIND MAY
OCCUR FARTHER SE...INVOF WEAK NWD-MOVING W-E FRONT IN N TX AND S
CNTRL OK...WHERE SOMEWHAT GREATER MOISTURE RESIDES WITHIN INVERTED-V
THERMODYNAMIC ENVIRONMENT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29025.
...CORFIDI
via SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0579.html
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