803  
WUCN11 CWTO 182253  
YELLOW WARNING - SEVERE THUNDERSTORM  
FOR SOUTHERN ONTARIO  
UPDATED BY ENVIRONMENT CANADA  
AT 6:53 P.M. EDT MONDAY 18 MAY 2026.  
---------------------------------------------------------------------  
YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:  
WATFORD - PINERY PARK - EASTERN LAMBTON COUNTY  
LONDON - MIDDLESEX  
HURON - PERTH  
SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY  
BRUCE PENINSULA - SAUBLE BEACH - TOBERMORY.  
 
---------------------------------------------------------------------  
IMPACT LEVEL: MODERATE  
FORECAST CONFIDENCE: HIGH  
 
==DISCUSSION==  
 
UPDATED OR ENDED BY 8:52 P.M. EDT.  
 
AT 6:53 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A  
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WIND  
GUSTS.  
 
THUNDERSTORM LOCATION: OLIPHANT TO GLENCOE  
 
MOTION: MOVING QUICKLY TO THE EAST AT 70 KM/H  
 
HAZARDS:  
WIND: DAMAGING (90 - 110 KM/H)  
 
LOCATIONS IN THE PATH:  
SAUBLE BEACH  
PARKHILL  
PAISLEY  
WIARTON  
HENSALL  
STRATHROY  
EXETER  
TEESWATER  
WINGHAM  
 
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  
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