WWCN11 CWTO 031235

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 8:35 A.M. EDT FRIDAY 3 JULY 2026.

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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

=NEW= NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION

      BRANTFORD - COUNTY OF BRANT

      ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION

      CITY OF HAMILTON.



YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:

      BURLINGTON - OAKVILLE.



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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 AND 

LARGE HAIL.



WHAT: 

WIND GUSTS UP TO 90 KM/H. 

UP TO QUARTER SIZE HAIL. 



WHEN: 

THIS MORNING. 



ADDITIONAL INFORMATION: 

A CLUSTER OF THUNDERSTORMS IS MOVING EAST OVER THE AREA THIS 

MORNING.



DAMAGE TO ROOFS, FENCES, BRANCHES OR SOFT SHELTERS IS POSSIBLE. WHEN 

THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND 

INJURES CANADIANS EVERY YEAR. STRONG WIND GUSTS CAN DAMAGE TREES, 

BUILDINGS AND OVERTURN VEHICLES. 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 X USING (HASH)ONSTORM. 



FOR MORE INFORMATION: 

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



HTTP://WEATHER.GC.CA



END/OSPC