Tornado Watch 805

Issued

Aug 24, 2011, 10:27 PM EDT (02:27 UTC)

Expired

Aug 25, 2011, 3:06 AM EDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

65 kt

The Cleveland radar (KCLE), 36 km from the middle of the area, began a volume at 02:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

90%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 2053Aug 24, 9:56 PM EDT
• Mesoscale Discussion 2054Aug 24, 11:48 PM EDT
• Mesoscale Discussion 2055Aug 25, 2:31 AM EDT

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

Tornado Watches in Ohio, 2011Tornado Watches in Pennsylvania, 2011Every tornado watch in 2011

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.