WUCN11 CWTO 222131
YELLOW WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 5:31 P.M. EDT SATURDAY 22 AUGUST 2026.
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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
=NEW= CITY OF HAMILTON
=NEW= KITCHENER - CAMBRIDGE - REGION OF WATERLOO
=NEW= GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY.

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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH

==DISCUSSION==

UPDATED OR ENDED BY 6:29 P.M. EDT.

AT�5:30 P.M. EDT,�A SEVERE THUNDERSTORM�IS LOCATED�OVER 
ROSEVILLE.�THIS SEVERE THUNDERSTORM IS MOVING EAST AT 50 
KM/H.�STRONG WIND GUSTS, UP TO QUARTER SIZE HAIL AND HEAVY RAIN ARE 
POSSIBLE. 

LOCATIONS AND NEARBY AREAS THAT COULD BE IMPACTED INCLUDE: GALT, 
CAMBRIDGE, HESPELER

LARGE HAIL MAY CAUSE SIGNIFICANT DAMAGE AND INJURY. LOCAL UTILITY 
OUTAGES ARE LIKELY. 

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

END/OSPC