WUCN11 CWTO 031858

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 2:58 P.M. EDT FRIDAY 3 JULY 2026.

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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

      YORK - DURHAM.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 4:57 P.M. EDT.



AT 2:58 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 

SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WIND GUSTS, UP TO 

QUARTER SIZE HAIL AND HEAVY RAIN.



THUNDERSTORM LOCATION: 

FROM NEWMARKET TO STOUFFVILLE 



MOTION: MOVING EAST AT 50 KM/H 



HAZARDS: 

WIND: STRONG (UP TO 100 KM/H) 

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

TORRENTIAL DOWNPOURS 



LOCATIONS IN THE PATH: 

PICKERING, MARKHAM, AJAX, WHITBY, OSHAWA



SOME TRAVEL DELAYS ARE LIKELY. DRIVING CONDITIONS WILL LIKELY BE 

DIFFICULT. LOCAL UTILITY OUTAGES ARE LIKELY. LARGE HAIL MAY CAUSE 

SIGNIFICANT DAMAGE AND INJURY. TAKE IMMEDIATE COVER IF A 

THUNDERSTORM APPROACHES. IF OUTSIDE, PROTECT YOURSELF FROM FLYING 

DEBRIS AND HAIL. WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) 

LIGHTNING KILLS AND INJURES CANADIANS EVERY YEAR. 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