SEVERE THUNDERSTORM WATCH NUMBER 677
NWS STORM PREDICTION CENTER NORMAN OK
925 AM EST MON JUL 25 2005
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN INDIANA
NORTHWEST AND NORTH CENTRAL OHIO
LAKE ERIE
EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 925 AM UNTIL 500
PM EST.

HAIL TO 2 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 45
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF
SOUTH BEND INDIANA TO 25 MILES EAST NORTHEAST OF MANSFIELD 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.
DISCUSSION...SEVERAL SMALL THUNDERSTORM CLUSTERS HAVE FORMED OVER NW
INDIANA/NE IL. THE ENVIRONMENT NEAR AND DOWNSTREAM FROM THESE
STORMS IS QUITE MOIST AND UNSTABLE /MLCAPE VALUES NEAR 3000
J/KG/...WHERE VISIBLE SATELLITE IMAGERY SHOWS THE POTENTIAL FOR
STRONG SURFACE HEATING. GIVEN THE PRESENCE OF AN E-W FRONT ACROSS
NRN INDIANA/EXTREME NW OH AND 30-35 KT UNIDIRECTIONAL WLY WIND
PROFILES...THE ONGOING CONVECTION MAY EVOLVE INTO A BOW ECHO COMPLEX
WITH THE POTENTIAL FOR DAMAGING WINDS AND LARGE HAIL.