WWCN11 CWTO 260142

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 9:42 P.M. EDT THURSDAY 25 JUNE 2026.

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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

      HURON - PERTH

      WATERLOO - WELLINGTON.



YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:

      WINDSOR - ESSEX - CHATHAM-KENT

      SARNIA - LAMBTON

      ELGIN

      LONDON - MIDDLESEX

      SIMCOE - DELHI - NORFOLK

      DUNNVILLE - CALEDONIA - HALDIMAND

      OXFORD - BRANT

      NIAGARA

      CITY OF HAMILTON

      SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY

      HANOVER - DUNDALK - SOUTHERN GREY 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.



WHAT: 

WIND GUSTS UP TO 90 KM/H. 

UP TO TOONIE SIZE HAIL. 

LOCALLY HEAVY RAINFALL IN EXCESS OF 50 MM. 



WHEN: 

THIS EVENING.



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. SECURE LOOSE OBJECTS. 



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



END/OSPC