753
WWCN11 CWTO 021103
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 7:03 A.M. EDT WEDNESDAY 2 SEPTEMBER 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
NEWMARKET - GEORGINA - NORTHERN YORK REGION
UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION
ORANGEVILLE - GRAND VALLEY - SOUTHERN DUFFERIN COUNTY
INNISFIL - NEW TECUMSETH - ANGUS
LINDSAY - SOUTHERN KAWARTHA LAKES.
YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:
SHELBURNE - MANSFIELD - NORTHERN DUFFERIN COUNTY
HANOVER - DUNDALK - SOUTHERN GREY COUNTY.
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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:
TORRENTIAL DOWNPOURS.
HAIL UP TO QUARTER SIZE.
WIND GUSTS UP TO 90 KM/H.
TIMING:
THIS MORNING.
ADDITIONAL INFORMATION:
THUNDERSTORMS ARE MOVING SOUTHEASTWARD OVER THE AREA THIS MORNING.
THE MAIN HAZARD IS TORRENTIAL RAINFALL.
LOCAL UTILITY OUTAGES ARE POSSIBLE. WHEN THUNDER ROARS, GO
INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND INJURES CANADIANS
EVERY YEAR. DON'T DRIVE THROUGH FLOODED ROADWAYS.
HEAVY RAIN CAN CAUSE FLASH FLOODING AND SIGNIFICANT REDUCTIONS TO
VISIBILITY.
LARGE HAIL CAN CAUSE SIGNIFICANT DAMAGE AND INJURY.
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
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