781
WWCN11 CWTO 181838
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 2:38 P.M. EDT SATURDAY 18 JULY 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
=NEW= BELLEVILLE - QUINTE - NORTHUMBERLAND
=NEW= PICTON - SANDBANKS PARK
CALEDON
NEWMARKET - GEORGINA - NORTHERN YORK REGION
UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION
HURON - PERTH
WATERLOO - WELLINGTON
DUFFERIN - INNISFIL
SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY
HANOVER - DUNDALK - SOUTHERN GREY COUNTY
PETERBOROUGH - KAWARTHA LAKES
HALIBURTON - MINDEN - SOUTHERN HALIBURTON 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 100 KM/H.
QUARTER SIZED HAIL.
RAINFALL AMOUNTS 25 TO 50 MM.
WHEN:
CONTINUING THIS AFTERNOON.
ADDITIONAL COMMENTS:
A COLD FRONT PUSHING THROUGH THE REGION WILL BRING A LINE OF
THUNDERSTORMS AS IT MOVES SOUTHEAST OVER THE AREA.
DRIVING CONDITIONS MAY BE DIFFICULT. LOCAL UTILITY OUTAGES ARE
POSSIBLE. DAMAGE TO ROOFS, FENCES, BRANCHES OR SOFT SHELTERS IS
POSSIBLE. WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING
KILLS AND INJURES CANADIANS EVERY YEAR. SECURE LOOSE OBJECTS. 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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