WUCN11 CWTO 211616

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 12:16 P.M. EDT TUESDAY 21 JULY 2026.

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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

      BURLINGTON - OAKVILLE.



YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:

      CITY OF HAMILTON.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 1:40 P.M. EDT.



AT 12:16 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 

SEVERE THUNDERSTORM CAPABLE OF PRODUCING STRONG WIND GUSTS, UP TO 

QUARTER SIZE HAIL AND HEAVY RAIN.



THUNDERSTORM LOCATION: NEAR BRONTE 



MOTION: 

MOVING QUICKLY TO THE EAST AT 60 KM/H 



HAZARDS: 

UP TO 90 KM/H WINDS. 

UP TO QUARTER SIZE HAIL. 

LOCALLY HEAVY RAINFALL. 



LOCATIONS IN THE PATH: 

BRONTE 

BRONTE HARBOUR 

OAKVILLE HARBOUR



LOCAL UTILITY OUTAGES ARE LIKELY. DAMAGE TO ROOFS, FENCES, SOFT 

SHELTERS OR TREES IS LIKELY. LARGE HAIL MAY CAUSE SIGNIFICANT DAMAGE 

AND INJURY. TAKE IMMEDIATE COVER IF A THUNDERSTORM APPROACHES. IF 

OUTSIDE, PROTECT YOURSELF FROM FLYING DEBRIS AND HAIL. DON'T DRIVE 

THROUGH FLOODED ROADWAYS. AVOID LOW-LYING AREAS. SEVERE THUNDERSTORM 

WARNINGS ARE ISSUED WHEN IMMINENT OR OCCURRING THUNDERSTORMS ARE 

EXPECTED TO PRODUCE 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