WWCN11 CWTO 091711
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 1:11 P.M. EDT THURSDAY 9 JULY 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
=NEW= CITY OF TORONTO
=NEW= HALTON HILLS - MILTON
=NEW= MISSISSAUGA - BRAMPTON
=NEW= VAUGHAN - RICHMOND HILL - MARKHAM
=NEW= HURON - PERTH
=NEW= KITCHENER - CAMBRIDGE - REGION OF WATERLOO
=NEW= GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY
=NEW= SMITHS FALLS - LANARK - SHARBOT LAKE
      WINDSOR - ESSEX - CHATHAM-KENT
      SARNIA - LAMBTON
      ELGIN
      LONDON - MIDDLESEX
      SIMCOE - DELHI - NORFOLK
      DUNNVILLE - CALEDONIA - HALDIMAND
      OXFORD - BRANT
      NIAGARA
      CITY OF HAMILTON
      BURLINGTON - OAKVILLE
      PICKERING - OSHAWA - SOUTHERN DURHAM REGION
      BELLEVILLE - QUINTE - NORTHUMBERLAND
      KINGSTON - PRINCE EDWARD
      STIRLING - TWEED - SOUTH FRONTENAC
      BROCKVILLE - LEEDS AND GRENVILLE.

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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 AND 
HEAVY RAIN.

WHAT: 
LOCALIZED RAINFALL AMOUNTS UP TO 60 MM. 
WIND GUSTS UP TO 90 KM/H. 

WHEN: 
THIS AFTERNOON AND EARLY EVENING. 

ADDITIONAL INFORMATION: 
LOCALIZED AREAS THAT RECEIVE MULTIPLE THUNDERSTORMS ARE EXPECTED TO 
SEE THE HIGHEST AMOUNTS.

DAMAGE TO ROOFS, FENCES, BRANCHES OR SOFT SHELTERS IS POSSIBLE. WHEN 
THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND 
INJURES CANADIANS EVERY YEAR. DON'T DRIVE THROUGH FLOODED ROADWAYS. 
SECURE LOOSE OBJECTS. HEAVY RAIN CAN CAUSE FLASH FLOODING AND 
SIGNIFICANT REDUCTIONS TO VISIBILITY. 

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