WWCN11 CWTO 022018

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 4:18 P.M. EDT THURSDAY 2 JULY 2026.

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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

=NEW= BURLINGTON - OAKVILLE

=NEW= HALTON HILLS - MILTON

=NEW= WINGHAM - BLYTH - NORTHERN HURON COUNTY

=NEW= LISTOWEL - MILVERTON - NORTHERN PERTH COUNTY

=NEW= KITCHENER - CAMBRIDGE - REGION OF WATERLOO

=NEW= GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY

      ST. THOMAS - AYLMER - EASTERN ELGIN COUNTY

      LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY

      SIMCOE - DELHI - NORFOLK

      DUNNVILLE - CALEDONIA - HALDIMAND

      OXFORD - BRANT

      NIAGARA

      CITY OF HAMILTON

      GODERICH - BLUEWATER - SOUTHERN HURON COUNTY

      STRATFORD - MITCHELL - SOUTHERN PERTH 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 NEAR 100 KM/H. 

UP TO PING PONG BALL SIZED HAIL. 

HEAVY RAIN, POSSIBLY EXCEEDING 30 MM. 



WHEN: 

THIS AFTERNOON AND EVENING. 



ADDITIONAL INFORMATION: 

THUNDERSTORMS MAY DEVELOP OVER THE AREA AND TRACK EAST THIS 

AFTERNOON AND EVENING. STRONG WIND GUSTS ARE THE MAIN THREAT, 

HOWEVER, LARGE HAIL AND HEAVY RAIN CAN NOT BE RULED OUT.



LOCAL UTILITY OUTAGES ARE POSSIBLE. DAMAGE TO ROOFS, FENCES, 

BRANCHES OR SOFT SHELTERS IS POSSIBLE. THERE IS A RISK OF INJURY. 

WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND 

INJURES CANADIANS EVERY YEAR. SEVERE THUNDERSTORM WATCHES ARE ISSUED 

WHEN CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF THUNDERSTORMS 

CAPABLE OF PRODUCING 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 X USING (HASH)ONSTORM. 



FOR MORE INFORMATION: 

HTTPS://WWW.ONTARIO.CA/PAGE/BE-PREPARED-EMERGENCY.



HTTP://WEATHER.GC.CA



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