

212 

WWUS20 KWNS 250234

SEL5

SPC WW 250234

OHZ000-PAZ000-LEZ000-250900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 805

NWS STORM PREDICTION CENTER NORMAN OK

1030 PM EDT WED AUG 24 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL OHIO

       FAR NORTHWEST PENNSYLVANIA

       LAKE ERIE



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1030 PM

UNTIL 500 AM EDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF ERIE

PENNSYLVANIA TO 35 MILES WEST SOUTHWEST OF MANSFIELD OHIO.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 802...WW 803...WW 804...



DISCUSSION...EMBEDDED SUPERCELLS/LEWPS MAY POSE A THREAT FOR

TORNADOES IN NRN OH/FAR NW PA LATER TNGT/EARLY THU. THE GREATEST

SUCH THREAT MAY EVOLVE FROM STORMS NOW OVER NW OH...AS THEY INTERACT

WITH WEAKENING OUTFLOW BOUNDARY MOVING SE FROM SE LWR MI AND

ENCOUNTER AREA OF SLIGHTLY-BACKED LOW LVL FLOW/HIGHER RH EWD ACROSS

NRN OH/FAR NW PA. RESULTING LEWP STRUCTURE COULD YIELD A

LONGER-LIVED TORNADO...IN ADDITION TO BRIEF ONES ALONG BOW.



AVIATION...TORNADOES AND 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

550. MEAN STORM MOTION VECTOR 29040.





...CORFIDI

