SEL0
SPC WW 182224
OHZ000-WVZ000-190500-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 660
NWS STORM PREDICTION CENTER NORMAN OK
625 PM EDT MON JUL 18 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHERN OHIO
CENTRAL WEST VIRGINIA
EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 625 PM UNTIL
100 AM EDT.
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 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES WEST
SOUTHWEST OF COLUMBUS OHIO TO 25 MILES NORTHEAST OF ELKINS WEST
VIRGINIA. 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...CONTINUE...WW 657...WW 658...WW 659...
DISCUSSION...SCATTERED THUNDERSTORMS OVER OH WILL SPREAD
SOUTHEASTWARD THROUGH THE EVENING AND ACROSS THE WATCH AREA. HIGH
BOUNDARY-LAYER THETA-E AND STEEP LOW LEVEL LAPSE RATES...COUPLED
WITH SUFFICIENT FLOW ALOFT WILL PROMOTE A RISK OF LOCALLY DAMAGING
WIND GUSTS IN THE STRONGER CELLS.
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 500. MEAN STORM
MOTION VECTOR 31030.
...HART
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