WUCN11 CWTO 092121

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 5:21 P.M. EDT SATURDAY 9 MAY 2026.

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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

=NEW= DUNNVILLE - CALEDONIA - HALDIMAND

=NEW= CITY OF HAMILTON

      ST. THOMAS - AYLMER - EASTERN ELGIN COUNTY

      SIMCOE - DELHI - NORFOLK

      OXFORD - BRANT.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 7:19 P.M. EDT.



AT 5:20 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 

SEVERE THUNDERSTORM CAPABLE OF PRODUCING VERY STRONG WIND GUSTS AND 

UP TO NICKEL SIZE HAIL.



A LINE OF SEVERE THUNDERSTORMS WAS LOCATED FROM NEAR FLAMBOROUGH TO 

NEAR PORT BURWELL PROVINCIAL PARK, MOVING EAST AT 70 KM/H. 



HAZARDS: 

90 KM/H WIND GUSTS 

UP TO NICKEL SIZED HAIL 

RISK OF A TORNADO



LOCAL UTILITY OUTAGES ARE LIKELY. LARGE HAIL MAY CAUSE SIGNIFICANT 

DAMAGE AND INJURY. THERE IS A RISK OF INJURY. TAKE IMMEDIATE COVER 

IF A THUNDERSTORM APPROACHES. IF OUTSIDE, PROTECT YOURSELF FROM 

FLYING DEBRIS AND HAIL. 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



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