WATCHES: Severe Thunderstorm Watch Number 758

WWUS20 KWNS 092256
SEL8
SPC WW 092256
OHZ000-PAZ000-LEZ000-100400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 758
NWS STORM PREDICTION CENTER NORMAN OK
655 PM EDT TUE AUG 9 2011

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

EASTERN OHIO
NORTHWEST PENNSYLVANIA
LAKE ERIE

EFFECTIVE THIS TUESDAY NIGHT FROM 655 PM UNTIL MIDNIGHT EDT.

HAIL TO 1 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 35 MILES WEST
NORTHWEST OF ERIE PENNSYLVANIA TO 50 MILES SOUTH SOUTHEAST OF
MANSFIELD OHIO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 753...WW 754...WW
755...WW 756...WW 757...

DISCUSSION...SCTD TSTMS/SHORT LINE SEGMENTS EXPECTED TO MOVE E INTO
WW AREA LATER THIS EVE AHEAD OF LOW AMPLITUDE DISTURBANCE IN WNWLY
MID/UPR LVL FLOW. STRENGTH OF WIND FIELD...PRESENCE OF EXISTING
SUSTAINED STORMS...AND NARROW AXIS OF SFC-BASED INSTABILITY
EXTENDING NEWD INTO NE OH/FAR NW PA SUGGEST POSSIBILITY OF ISOLD
WIND GUSTS AND POSSIBLY MARGINALLY SVR HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION
VECTOR 29030.

...CORFIDI

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