915
WUCN11 CWTO 182318
YELLOW WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 7:18 P.M. EDT MONDAY 18 MAY 2026.
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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY
HURON - PERTH
MOUNT FOREST - ARTHUR - NORTHERN WELLINGTON COUNTY
GREY - BRUCE.
YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:
STRATHROY - KOMOKA - WESTERN MIDDLESEX COUNTY.
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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
UPDATED OR ENDED BY 9:16 P.M. EDT.
AT 7:17 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WIND
GUSTS.
THUNDERSTORM LOCATION: SHALLOW LAKE TO ILDERTON
MOTION: MOVING EAST AT 70 KM/H
HAZARDS:
WIND: DAMAGING (90 - 110 KM/H)
LOCATIONS IN THE PATH:
WALKERTON
CHESLEY
MILDMAY
MITCHELL
OWEN SOUND
LISTOWEL
STRATFORD
PALMERSTON
MOUNT FOREST
MARKDALE
LOCAL UTILITY OUTAGES ARE LIKELY. DAMAGE TO ROOFS, FENCES, SOFT
SHELTERS OR TREES IS LIKELY. 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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