

642 

WWUS20 KWNS 222229

SEL7

SPC WW 222229

OHZ000-LEZ000-230400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 517

NWS STORM PREDICTION CENTER NORMAN OK

630 PM EDT THU JUL 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PART OF NORTHWEST OHIO

       LAKE ERIE



EFFECTIVE THIS THURSDAY NIGHT FROM 630 PM UNTIL MIDNIGHT EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 20 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF

TOLEDO OHIO TO 85 MILES EAST SOUTHEAST OF TOLEDO OHIO.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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 514...WW 515...WW 516...



DISCUSSION...A SMALL CLUSTER OF SUPERCELLS IS EXPECTED TO PERSIST

THIS EVENING ALONG THE SRN FRINGE OF STRONGER LOW-LEVEL FORCING AND

SHEAR PRESENT ACROSS LOWER MI.  GIVEN THE MOIST/UNSTABLE AIR MASS IN

PLACE...THE THREAT FOR A COUPLE OF TORNADOES WILL EXIST THROUGH THE

REMAINDER OF THE EVENING IN ADDITION TO HAIL AND LOCALLY DAMAGING

WIND GUSTS.



AVIATION...TORNADOES AND 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 28025.





...MEAD

