WUCN11 CWTO 192300
RED WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 7:00 P.M. EDT TUESDAY 19 MAY 2026.
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RED LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
      DUNNVILLE - CALEDONIA - HALDIMAND
      NIAGARA
      CITY OF HAMILTON.

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IMPACT LEVEL: EXTREME
FORECAST CONFIDENCE: VERY HIGH

==DISCUSSION==

UPDATED OR ENDED BY 8:58 P.M. EDT.

AT 6:59 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING AN 
EXTREMELY DANGEROUS THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE 
WIND GUSTS AND UP TO QUARTER SIZE HAIL.

THUNDERSTORM LOCATION: JERSEYVILLE TO TOWNSEND 

MOTION: MOVING QUICKLY TO THE EAST AT 80 KM/H 

HAZARDS: 
WIND: DAMAGING (110-130 KM/H) 

LOCATIONS IN THE PATH: 
HAMILTON 
HALDIMAND COUNTY 
WELLAND 
ST. CATHARINES

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

END/OSPC