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WWCN11 CWTO 021619
ORANGE WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 12:19 P.M. EDT WEDNESDAY 2 SEPTEMBER 2026.
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ORANGE LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
=NEW= CITY OF TORONTO
=NEW= WATFORD - PINERY PARK - EASTERN LAMBTON COUNTY
=NEW= ELGIN
=NEW= LONDON - MIDDLESEX
=NEW= SIMCOE - DELHI - NORFOLK
=NEW= DUNNVILLE - CALEDONIA - HALDIMAND
=NEW= OXFORD - BRANT
=NEW= NIAGARA
=NEW= CITY OF HAMILTON
=NEW= HALTON - PEEL
=NEW= YORK - DURHAM
=NEW= HURON - PERTH
=NEW= WATERLOO - WELLINGTON
=NEW= DUFFERIN - INNISFIL
=NEW= SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY
=NEW= HANOVER - DUNDALK - SOUTHERN GREY COUNTY
=NEW= BELLEVILLE - QUINTE - NORTHUMBERLAND
=NEW= PICTON - SANDBANKS PARK
=NEW= NAPANEE - CONSECON
=NEW= LINDSAY - SOUTHERN KAWARTHA LAKES
=NEW= PETERBOROUGH CITY - LAKEFIELD - SOUTHERN PETERBOROUGH COUNTY.
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IMPACT LEVEL: HIGH
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF DANGEROUS
THUNDERSTORMS THAT MAY BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS,
LARGE HAIL AND HEAVY RAIN.
HAZARDS:
DAMAGING WINDS WITH GUSTS IN EXCESS OF 110 KM/H POSSIBLE.
QUARTER TO PING PONG BALL SIZE HAIL.
TORRENTIAL DOWNPOURS WITH LOCAL RAINFALL AMOUNTS UP TO 50
MILLIMETRES.
RISK OF A TORNADO.
TIMING:
THIS AFTERNOON TO THIS EVENING.
ADDITIONAL INFORMATION:
THUNDERSTORMS ARE EXPECTED TO DEVELOP MID TO LATE THIS AFTERNOON
ALONG AND AHEAD OF AN ADVANCING COLD FRONT. THERE STILL REMAINS SOME
UNCERTAINTY WITH HOW STRONG THUNDERSTORMS COULD BECOME DUE TO SOME
LINGERING CLOUD COVER ACROSS THE REGION WHICH COULD INHIBIT HOW MUCH
INSTABILITY BUILDS IN. LATEST TRENDS IN OBSERVATIONAL DATA AND
MODELS STILL INDICATE THAT SUFFICIENT INSTABILITY SHOULD BUILD
LEADING TO A ROBUST SEVERE WEATHER THREAT.
THE PRIMARY CONCERN WITH ANY THUNDERSTORMS WILL BE FOR STRONG AND
POTENTIALLY DAMAGING WINDS ALONG WITH LARGE HAIL AND TORRENTIAL
RAIN. THAT BEING SAID, CONDITIONS COULD BECOME FAVOURABLE FOR SOME
THUNDERSTORMS TO BE ABLE TO PRODUCE A TORNADO.
UTILITY OUTAGES ARE POSSIBLE. SIGNIFICANT DAMAGE TO PROPERTY,
BUILDINGS AND TREES IS POSSIBLE. THERE IS A RISK OF SERIOUS INJURY.
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. WHEN THUNDER ROARS, GO
INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND INJURES CANADIANS
EVERY YEAR.
LARGE HAIL CAN CAUSE SIGNIFICANT DAMAGE AND INJURY.
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 SOCIAL MEDIA USING
(HASH)ONSTORM.
FOR MORE INFORMATION:
HTTPS://WWW.ONTARIO.CA/PAGE/BE-PREPARED-EMERGENCY.
HTTP://WEATHER.GC.CA
END/OSPC
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