WWCN11 CWTO 082321

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 7:21 P.M. EDT SATURDAY 8 AUGUST 2026.

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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

      PETAWAWA - PEMBROKE - COBDEN

      DEEP RIVER - WHITNEY - EASTERN ALGONQUIN PARK.



YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:

      CITY OF TORONTO

      OXFORD - BRANT

      CITY OF HAMILTON

      BURLINGTON - OAKVILLE

      HALTON HILLS - MILTON

      MISSISSAUGA - BRAMPTON

      VAUGHAN - RICHMOND HILL - MARKHAM

      PICKERING - OSHAWA - SOUTHERN DURHAM REGION

      BELLEVILLE - QUINTE - NORTHUMBERLAND

      PICTON - SANDBANKS PARK

      NAPANEE - CONSECON.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==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: 

WIND GUSTS UP TO 90 KM/H. 

QUARTER SIZE HAIL. 

HEAVY RAINFALL. 



TIMING: 

CONTINUING EARLY THIS EVENING.



LOCAL UTILITY OUTAGES ARE POSSIBLE. WHEN THUNDER ROARS, GO 

INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND INJURES CANADIANS 

EVERY YEAR. SECURE LOOSE OBJECTS. 



SEVERE THUNDERSTORM WATCHES ARE ISSUED WHEN CONDITIONS ARE 

FAVOURABLE FOR THE DEVELOPMENT OF THUNDERSTORMS CAPABLE OF PRODUCING 

DAMAGING HAIL, WIND OR RAIN. 



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 POST REPORTS ON SOCIAL MEDIA USING 

(HASH)ONSTORM. 



FOR MORE INFORMATION: 

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



HTTP://WEATHER.GC.CA



END/OSPC