WUCN11 CWTO 280044

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 8:44 P.M. EDT MONDAY 27 JULY 2026.

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

YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

=NEW= NEWMARKET - GEORGINA - NORTHERN YORK REGION

=NEW= UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION.



YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:

      ORILLIA - LAGOON CITY - WASHAGO.



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

IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 10:42 P.M. EDT.



AT 8:43 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 

SEVERE THUNDERSTORM CAPABLE OF PRODUCING STRONG WIND GUSTS, UP TO 

QUARTER SIZE HAIL AND HEAVY RAIN.



THUNDERSTORM LOCATION: 

OVER GEORGINA ISLAND 



MOTION: MOVING SOUTHEAST AT 20 KM/H 



HAZARDS: 

HAIL: UP TO LOONIE SIZE (UP TO 3 CM) 

WIND: STRONG (UP TO 90 KM/H) 



LOCATIONS IN THE PATH: 

GEORGINA ISLAND, BEAVERTON HARBOUR, BEAVERTON, MAPLE BEACH, PORT 

BOLSTER, PEFFERLAW, UDORA



DAMAGE TO ROOFS, FENCES, SOFT SHELTERS OR TREES IS 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. 



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 SOCIAL MEDIA USING 

(HASH)ONSTORM. 



FOR MORE INFORMATION: 

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



HTTP://WEATHER.GC.CA



END/OSPC