WUCN11 CWTO 301600

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 12:00 NOON EDT TUESDAY 30 JUNE 2026.

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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

=NEW= TAMWORTH - SYDENHAM - SOUTH FRONTENAC

=NEW= WESTPORT - CHARLESTON LAKE

      BANCROFT - BON ECHO PARK

      PLEVNA - SHARBOT LAKE - WESTERN LANARK COUNTY.



YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:

      HALIBURTON.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 1:59 P.M. EDT.



AT 12:00 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 

LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WIND 

GUSTS, UP TO QUARTER SIZE HAIL AND HEAVY RAIN.



THUNDERSTORM LOCATION: 

FROM COE HILL TO GRIFFITH. 



MOTION: MOVING SOUTHEAST AT 30 KM/H 



HAZARDS: 

WIND: STRONG (90 - 100 KM/H) 

HAIL: UP TO QUARTER SIZE (UP TO 2.5 CM) 

RAIN: HEAVY (30 - 50 MM) 



LOCATIONS IN THE PATH: 

DENBIGH, COE HILL, PLEVNA, OMPAH, CLOYNE, NORTHBROOK, FLINTON, 

KALADAR, MABERLY, VERONA



LOCAL UTILITY OUTAGES ARE LIKELY. DAMAGE TO ROOFS, FENCES, SOFT 

SHELTERS OR TREES IS LIKELY. HEAVY RAIN MAY CAUSE FLASH FLOODING AND 

SIGNIFICANT REDUCTIONS TO VISIBILITY. TAKE IMMEDIATE COVER IF A 

THUNDERSTORM APPROACHES. IF OUTSIDE, PROTECT YOURSELF FROM FLYING 

DEBRIS AND HAIL. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. SEVERE 

THUNDERSTORM WARNINGS ARE ISSUED WHEN IMMINENT OR OCCURRING 

THUNDERSTORMS ARE EXPECTED TO PRODUCE 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