WWCN11 CWTO 010153

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 9:53 P.M. EDT TUESDAY 30 JUNE 2026.

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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

=NEW= APSLEY - WOODVIEW - NORTHERN PETERBOROUGH COUNTY

      KINGSTON - ODESSA - FRONTENAC ISLANDS

      STIRLING - TWEED - SOUTH FRONTENAC

      BANCROFT - BON ECHO PARK

      BROCKVILLE - LEEDS AND GRENVILLE

      CITY OF OTTAWA

      GATINEAU

      PRESCOTT AND RUSSELL

      CORNWALL - MORRISBURG

      SMITHS FALLS - LANARK - SHARBOT LAKE

      HALIBURTON

      RENFREW - PEMBROKE - BARRY'S BAY

      ALGONQUIN

      BURK'S FALLS - BAYFIELD INLET.



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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 110 KM/H. 

GOLF BALL SIZED HAIL. 

RAINFALL AMOUNTS IN EXCESS OF 50 MM. 

RISK OF TORNADOES. 



WHEN: 

CONTINUING THIS EVENING.



LOCAL UTILITY OUTAGES ARE 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. HEAVY RAIN CAN CAUSE FLASH FLOODING 

AND SIGNIFICANT REDUCTIONS TO VISIBILITY. STRONG WIND GUSTS CAN 

DAMAGE TREES, BUILDINGS AND OVERTURN VEHICLES. 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