WWCN11 CWTO 011853

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 2:53 P.M. EDT WEDNESDAY 1 JULY 2026.

---------------------------------------------------------------------

YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

=NEW= MOUNT FOREST - ARTHUR - NORTHERN WELLINGTON COUNTY

=NEW= ORANGEVILLE - GRAND VALLEY - SOUTHERN DUFFERIN COUNTY

=NEW= SHELBURNE - MANSFIELD - NORTHERN DUFFERIN COUNTY

=NEW= BARRIE - ORILLIA - MIDLAND

=NEW= PORT CARLING - PORT SEVERN

=NEW= BRACEBRIDGE - GRAVENHURST

      TOWN OF PARRY SOUND - ROSSEAU - KILLBEAR PARK

      BAYFIELD INLET - DUNCHURCH.



---------------------------------------------------------------------

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 110 KM/H. 

PING PONG BALL SIZED HAIL. 

HEAVY RAIN, POSSIBLY EXCEEDING 40 MM. 



WHEN: 

THIS AFTERNOON AND EVENING, POSSIBLY CONTINUING INTO THE OVERNIGHT 

HOURS. 



ADDITIONAL INFORMATION: 

THUNDERSTORMS ARE APPROACHING FROM LAKE HURON THIS AFTERNOON AND MAY 

TRACK OVER THE AREA. THE POTENTIAL FOR THUNDERSTORMS WILL THEN 

CONTINUE FOR THE REMAINDER OF THE AFTERNOON AND EVENING AND POSSIBLY 

OVERNIGHT.



LOCAL UTILITY OUTAGES ARE POSSIBLE. 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. 



FOR MORE INFORMATION: 

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



HTTP://WEATHER.GC.CA



END/OSPC



WWCN11 CWTO 011853

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 2:53 P.M. EDT WEDNESDAY 1 JULY 2026.

---------------------------------------------------------------------

YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

      TAMWORTH - SYDENHAM - SOUTH FRONTENAC

      BANCROFT - BON ECHO PARK

      BROCKVILLE - LEEDS AND GRENVILLE

      CITY OF OTTAWA

      GATINEAU

      PRESCOTT AND RUSSELL

      CORNWALL - MORRISBURG

      SMITHS FALLS - LANARK - SHARBOT LAKE

      HUNTSVILLE - BAYSVILLE

      OXTONGUE LAKE - FORT IRWIN - NORTHERN HALIBURTON COUNTY

      RENFREW - PEMBROKE - BARRY'S BAY

      ALGONQUIN

      SOUTH RIVER - BURK'S FALLS.



---------------------------------------------------------------------

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 AFTERNOON AND 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