WUCN11 CWTO 182237

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 6:37 P.M. EDT MONDAY 18 MAY 2026.

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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

      CHATHAM-KENT - RONDEAU PARK

      SARNIA - LAMBTON

      LONDON - MIDDLESEX.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 8:35 P.M. EDT.



AT 6:36 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 

LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WIND 

GUSTS.



THUNDERSTORM LOCATION: HIGHLAND GLEN TO LOUISVILLE 



MOTION: MOVING EAST AT 70 KM/H 



HAZARDS: 

WIND: DAMAGING (90 - 110 KM/H) 



LOCATIONS IN THE PATH: 

THAMESVILLE 

FOREST 

BOTHWELL 

WATFORD 

LAMBTON SHORES 

THEDFORD 

NEWBURY 

WARDSVILLE 

KERWOOD 

PARKHILL



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



END/OSPC