Friday, June 6, 2008

WATCHES: Severe Thunderstorm Watch Number 477

WWUS20 KWNS 062335
SEL7
SPC WW 062335
INZ000-OHZ000-LEZ000-070500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 477
NWS STORM PREDICTION CENTER NORMAN OK
735 PM EDT FRI JUN 6 2008

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

SMALL PART OF EAST CENTRAL INDIANA
LARGE PART OF NORTHWEST OHIO
LAKE ERIE

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 735 PM
UNTIL 100 AM EDT.

HAIL TO 1.5 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 EAST AND WEST OF A LINE FROM 40 MILES NORTH
NORTHEAST OF FINDLAY OHIO TO 20 MILES EAST SOUTHEAST OF DAYTON
OHIO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 473...WW 475...WW 476...

DISCUSSION...LINE OF SEVERE THUNDERSTORMS CONTINUE TO MOVE VERY
RAPIDLY EWD ACROSS CENTRAL INDIANA ACCOMPANIED BY DAMAGING WINDS.
WHILE AIR MASS INTO OH A LITTLE LESS UNSTABLE...THE STEEP LAPSE
RATES AND STRONG DEEP LAYER SHEAR SHOULD SUPPORT DAMAGING WINDS FOR
SEVERAL MORE HOURS AS THE LINE MOVES INTO NWRN OH.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 24045.


...HALES

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