WWCN11 CWTO 241356
SEVERE THUNDERSTORM WATCH
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 9:56 A.M. EDT WEDNESDAY 24 JULY 2024.
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SEVERE THUNDERSTORM WATCH FOR:
=NEW= BANCROFT - HASTINGS HIGHLANDS - DENBIGH
=NEW= MERRICKVILLE-WOLFORD - KEMPTVILLE
=NEW= CITY OF OTTAWA
=NEW= GATINEAU
=NEW= PRESCOTT AND RUSSELL
=NEW= CORNWALL - MORRISBURG
=NEW= SMITHS FALLS - LANARK - SHARBOT LAKE
=NEW= OXTONGUE LAKE - FORT IRWIN - NORTHERN HALIBURTON COUNTY
=NEW= RENFREW - PEMBROKE - BARRY'S BAY
=NEW= ALGONQUIN.

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==DISCUSSION==

CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF SEVERE 
THUNDERSTORMS THAT MAY BE CAPABLE OF PRODUCING STRONG WIND GUSTS, 
LARGE HAIL AND HEAVY RAIN.

HAZARDS: 
STRONG WINDS GUSTING UP TO 110 KM/H 
TORRENTIAL DOWNPOURS WITH 50 MM FALLING WITHIN AN HOUR 
NICKEL TO GOLF BALL SIZED HAIL 
RISK OF A TORNADO 

TIMING: 
LATE THIS MORNING THROUGH THIS EVENING. 

DISCUSSION: 
THE MAIN THREATS WILL BE STRONG WINDS, TORRENTIAL DOWNPOURS AND 
HAIL. THERE IS ALSO A RISK OF A TORNADO TODAY, ESPECIALLY TOWARDS 
THE OTTAWA RIVER VALLEY.

LARGE HAIL CAN DAMAGE PROPERTY AND CAUSE INJURY. STRONG WIND GUSTS 
CAN TOSS LOOSE OBJECTS, DAMAGE WEAK BUILDINGS, BREAK BRANCHES OFF 
TREES AND OVERTURN LARGE VEHICLES. HEAVY DOWNPOURS CAN CAUSE FLASH 
FLOODS AND WATER POOLING ON ROADS. WATER-RELATED ACTIVITIES MAY BE 
UNSAFE DUE TO VIOLENT AND SUDDEN GUSTS OF WIND OVER BODIES OF WATER. 
LIGHTNING KILLS AND INJURES CANADIANS EVERY YEAR. REMEMBER, WHEN 
THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) 

SEVERE THUNDERSTORM WATCHES ARE ISSUED WHEN ATMOSPHERIC CONDITIONS 
ARE FAVOURABLE FOR THE DEVELOPMENT OF THUNDERSTORMS THAT COULD 
PRODUCE ONE OR MORE OF THE FOLLOWING: LARGE HAIL, DAMAGING WINDS, 
TORRENTIAL RAINFALL. 

EMERGENCY MANAGEMENT ONTARIO RECOMMENDS THAT YOU TAKE COVER 
IMMEDIATELY IF THREATENING WEATHER APPROACHES. 

PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY 
ENVIRONMENT CANADA. 

TO REPORT SEVERE WEATHER IN ONTARIO, SEND AN EMAIL TO 
ONSTORM(AT)EC.GC.CA OR TWEET REPORTS USING (HASH)ONSTORM. TO REPORT 
SEVERE WEATHER IN GATINEAU, SEND AN EMAIL TO ONSTORM(AT)EC.GC.CA OR 
TWEET REPORTS USING (HASH)QCSTORM. 

FOR MORE INFORMATION: 
HTTPS://WWW.ONTARIO.CA/PAGE/BE-PREPARED-EMERGENCY.

HTTP://WEATHER.GC.CA

END/OSPC