278
WUCN11 CWTO 231940
SEVERE THUNDERSTORM WARNING
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 3:40 P.M. EDT TUESDAY 23 SEPTEMBER 2025.
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SEVERE THUNDERSTORM WARNING FOR:
BARRIE - COLLINGWOOD - HILLSDALE
ORILLIA - LAGOON CITY - WASHAGO.
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==DISCUSSION==
UPDATED OR ENDED BY 5:29 P.M. EDT.
AT 3:40 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A
CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING STRONG WIND
GUSTS AND HEAVY RAIN.
THIS CLUSTER OF SEVERE THUNDERSTORMS IS LOCATED FROM ORO TO NEW
LOWELL, MOVING EAST AT 30 KM/H.
HAZARD: HEAVY RAINFALL WITH LOCAL AMOUNTS OF 50 TO 75 MM.
LOCATIONS IMPACTED INCLUDE:
ORILLIA, CUNDLES, LITTLE LAKE, ELMVALE, SPRINGWATER PROVINCIAL PARK,
HILLSDALE, BASS LAKE PROVINCIAL PARK, HILLSDALE, BASS LAKE
PROVINCIAL PARK, JACKS LAKE, NEW LOWELL, STRONGVILLE, EDENVALE,
MIDHURST, CRAIGHURST, ORO, CREIGHTON, HAWKESTONE, PHELPSTON,
MINESING, ANTEN MILLS, FERGUSONVALE, APTO, MIDHURST STATION,
DALSTON, HORSESHOE VALLEY AND CROWN HILL.
HEAVY RAIN MAY CAUSE FLASH FLOODING AND SIGNIFICANT REDUCTIONS TO
VISIBILITY. TAKE IMMEDIATE COVER IF A THUNDERSTORM APPROACHES. IF
OUTSIDE, PROTECT YOURSELF FROM FLYING DEBRIS AND HAIL. DON'T DRIVE
THROUGH FLOODED ROADWAYS. AVOID LOW-LYING AREAS.
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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