806
WUCN11 CWTO 040706
YELLOW WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 3:06 A.M. EDT SATURDAY 4 JULY 2026.
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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION.
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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
UPDATED OR ENDED BY 5:04 A.M. EDT.
AT 3:05 A.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING STRONG WIND GUSTS, LOONIE
TO PING PONG BALL SIZE HAIL AND HEAVY RAIN.
THUNDERSTORM LOCATION: OVER JORDAN HARBOUR
MOTION: MOVING SOUTHEAST AT 40 KM/H
HAZARDS:
WIND: DAMAGING (90 - 110 KM/H)
HAIL: LOONIE TO PING PONG BALL SIZE (2.5 TO 4.5 CM)
RAIN: HEAVY (15 - 50 MM)
LOCATIONS IN THE PATH:
BEAMSVILLE
VINELAND
ST. CATHARINES
THOROLD
HEAVY RAIN MAY CAUSE FLASH FLOODING AND SIGNIFICANT REDUCTIONS TO
VISIBILITY. LARGE HAIL MAY CAUSE SIGNIFICANT DAMAGE AND 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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