WUCN11 CWTO 232358
YELLOW WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 7:58 P.M. EDT SUNDAY 23 AUGUST 2026.
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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
      LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY
      STRATFORD - MITCHELL - SOUTHERN PERTH COUNTY.

YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:
      GODERICH - BLUEWATER - SOUTHERN HURON COUNTY.

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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH

==DISCUSSION==

UPDATED OR ENDED BY 8:30 P.M. EDT.

AT�7:56 P.M. EDT,�A SEVERE THUNDERSTORM�IS LOCATED�OVER 
CLANDEBOYE.�THIS SEVERE THUNDERSTORM IS MOVING EAST AT 45 
KM/H.�STRONG WIND GUSTS, UP TO QUARTER SIZE HAIL AND HEAVY RAIN ARE 
POSSIBLE. 

LOCATIONS AND NEARBY AREAS THAT COULD BE IMPACTED INCLUDE: 
CLANDEBOYE, LUCAN, BIRR, GRANTON, BRYANSTON, RANNOCH, ST. MARYS, 
WELLBURN

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. 

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