WWCN11 CWTO 182014

ORANGE WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 4:14 P.M. EDT SATURDAY 18 JULY 2026.

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ORANGE LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

      WINDSOR - ESSEX - CHATHAM-KENT

      SARNIA - PETROLIA - WESTERN LAMBTON COUNTY

      ELGIN

      SIMCOE - DELHI - NORFOLK

      DUNNVILLE - CALEDONIA - HALDIMAND

      NIAGARA.



ORANGE LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:

      WATFORD - PINERY PARK - EASTERN LAMBTON COUNTY

      LONDON - MIDDLESEX

      OXFORD - BRANT

      CITY OF HAMILTON.



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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.



WHAT: 

WIND GUSTS UP TO 110 KM/H. 

QUARTER TO PING PONG BALL SIZED HAIL. 

RAINFALL AMOUNTS 25 TO 40 MM. 

RISK OF TORNADOES. 



WHEN: 

ENDING EARLY THIS EVENING. 



ADDITIONAL COMMENTS: 

A COLD FRONT PUSHING THROUGH THE REGION MAY CONTINUE TO BRING 

THUNDERSTORMS AS IT MOVES SOUTHEAST OVER THE AREA.



UTILITY OUTAGES ARE POSSIBLE. SIGNIFICANT DAMAGE TO PROPERTY, 

BUILDINGS AND TREES IS POSSIBLE. FAST-MOVING AND RAPIDLY RISING 

WATER CAN SWEEP VEHICLES AWAY AND DAMAGE INFRASTRUCTURE. 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



END/OSPC