WWCN11 CWTO 020045

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 8:45 P.M. EDT WEDNESDAY 1 JULY 2026.

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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

      BROCKVILLE - PRESCOTT

      MERRICKVILLE-WOLFORD - KEMPTVILLE

      CITY OF OTTAWA

      GATINEAU

      PRESCOTT AND RUSSELL

      CORNWALL - MORRISBURG.



YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - ENDED FOR:

      GANANOQUE - MALLORYTOWN

      WESTPORT - CHARLESTON LAKE

      SMITHS FALLS - PERTH - EASTERN LANARK 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. 

PING PONG BALL SIZED HAIL. 

HEAVY RAIN, POSSIBLY EXCEEDING 40 MM. 



WHEN: 

THIS EVENING. 



ADDITIONAL INFORMATION: 

THUNDERSTORMS MAY DEVELOP QUICKLY AND BRING STRONG WINDS, HAIL AND 

HEAVY RAIN.



THERE IS A RISK OF INJURY. WHEN THUNDER ROARS, GO 

INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND INJURES CANADIANS 

EVERY YEAR. STRONG WIND GUSTS CAN DAMAGE TREES, BUILDINGS AND 

OVERTURN VEHICLES. 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 X USING (HASH)ONSTORM. TO 

REPORT SEVERE WEATHER IN GATINEAU, SEND AN EMAIL TO 

ONSTORM(AT)EC.GC.CA OR POST REPORTS ON X USING (HASH)QCSTORM. 



FOR MORE INFORMATION: 

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



HTTP://WEATHER.GC.CA



END/OSPC