063
WUCN11 CWTO 030030
YELLOW WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 8:30 P.M. EDT WEDNESDAY 2 SEPTEMBER 2026.
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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
=NEW= NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION
=NEW= CITY OF HAMILTON
DUNNVILLE - CALEDONIA - HALDIMAND
ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION.
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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
UPDATED OR ENDED BY 9:27 P.M. EDT.
AT 8:28 P.M. EDT, A LINE OF SEVERE THUNDERSTORMS IS LOCATED FROM
STONEY CREEK TO NELLES CORNERS. THESE SEVERE THUNDERSTORMS ARE
MOVING QUICKLY TO THE EAST AT 70 KM/H. STRONG WIND GUSTS, UP TO
QUARTER SIZE HAIL AND HEAVY RAIN ARE POSSIBLE.
LOCATIONS AND NEARBY AREAS THAT COULD BE IMPACTED INCLUDE: HALDIMAND
COUNTY, ST. CATHARINES, WELLAND, NIAGARA FALLS
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.
HEAVY RAIN MAY CAUSE FLASH FLOODING AND SIGNIFICANT REDUCTIONS TO
VISIBILITY. LARGE HAIL MAY CAUSE SIGNIFICANT DAMAGE AND INJURY.
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
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