664
WUCN11 CWTO 122226
YELLOW WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 6:26 P.M. EDT WEDNESDAY 12 AUGUST 2026.
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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
=NEW= HALTON HILLS - MILTON
=NEW= MISSISSAUGA - BRAMPTON
CALEDON
GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY.
YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:
ORANGEVILLE - GRAND VALLEY - SOUTHERN DUFFERIN COUNTY.
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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
UPDATED OR ENDED BY 7:09 P.M. EDT.
AT 6:25 P.M. EDT, A SEVERE THUNDERSTORM IS LOCATED OVER ALTON. THIS
SEVERE THUNDERSTORM IS MOVING SOUTHEAST AT 30 KM/H. STRONG WIND
GUSTS, UP TO QUARTER SIZE HAIL AND HEAVY RAIN ARE POSSIBLE.
LOCATIONS AND NEARBY AREAS THAT COULD BE IMPACTED INCLUDE: CALEDON
VILLAGE, HALTON HILLS
TAKE IMMEDIATE COVER IF A THUNDERSTORM APPROACHES. IF OUTSIDE,
PROTECT YOURSELF FROM FLYING DEBRIS AND HAIL.
SEVERE THUNDERSTORM WARNINGS ARE ISSUED WHEN IMMINENT OR OCCURRING
THUNDERSTORMS ARE EXPECTED TO PRODUCE DAMAGING HAIL, WIND OR RAIN.
LOCAL UTILITY OUTAGES ARE LIKELY. WHEN THUNDER ROARS, GO
INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND INJURES CANADIANS
EVERY YEAR. LARGE HAIL MAY 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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