964
WWCN11 CWTO 120139
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 9:39 P.M. EDT THURSDAY 11 JUNE 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= LONDON - MIDDLESEX
=NEW= GODERICH - BLUEWATER - SOUTHERN HURON 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.
WHAT:
WIND GUSTS OF 90 TO 100 KM/H.
RISK OF TORNADOES.
WHEN:
LATE THIS EVENING AND OVERNIGHT.
ADDITIONAL INFORMATION:
A LINE OF THUNDERSTORMS IS MOVING EASTWARD FROM LOWER MICHIGAN.
WHILE THE MAIN THREAT WILL BE DAMAGING WIND GUSTS, A BRIEF TORNADO
CANNOT BE RULED OUT. ALTHOUGH THE LINE IS EXPECTED TO WEAKEN AS IT
APPROACHES THE INTERNATIONAL BORDER, ITS EVENTUAL STRENGTH REMAINS
UNCERTAIN.
LOCAL UTILITY OUTAGES ARE POSSIBLE. DAMAGE TO ROOFS, FENCES,
BRANCHES OR SOFT SHELTERS IS POSSIBLE. WHEN THUNDER ROARS, GO
INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND INJURES CANADIANS
EVERY YEAR.
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
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