305
WWCN11 CWTO 031351
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 9:51 A.M. EDT THURSDAY 3 SEPTEMBER 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
=NEW= WINDSOR - ESSEX - CHATHAM-KENT
=NEW= SARNIA - LAMBTON
=NEW= RODNEY - SHEDDEN - WESTERN ELGIN COUNTY
=NEW= STRATHROY - KOMOKA - WESTERN MIDDLESEX 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:
STRONG WIND GUSTS OF 90 TO 110 KM/H
NICKEL TO PING PONG BALL SIZED HAIL
TORRENTIAL DOWNPOURS
WHEN:
THIS MORNING INTO THIS EVENING.
LOCAL UTILITY OUTAGES ARE POSSIBLE. DAMAGE TO ROOFS, FENCES,
BRANCHES OR SOFT SHELTERS IS POSSIBLE. BE PREPARED FOR SEVERE
WEATHER. IF THREATENING WEATHER APPROACHES, TAKE COVER IN A BASEMENT
OR INTERIOR ROOM. IF OUTSIDE, PROTECT YOURSELF FROM FLYING DEBRIS
AND HAIL. WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING
KILLS AND INJURES CANADIANS EVERY YEAR. DON'T DRIVE THROUGH FLOODED
ROADWAYS. 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
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