WUCN11 CWTO 190132
YELLOW WARNING - SEVERE THUNDERSTORM
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 9:32 P.M. EDT MONDAY 18 MAY 2026.
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YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:
      OXTONGUE LAKE - FORT IRWIN - NORTHERN HALIBURTON COUNTY
      ALGONQUIN.

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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH

==DISCUSSION==

UPDATED OR ENDED BY 11:30 P.M. EDT.

AT 9:31 P.M. EDT, ENVIRONMENT CANADA METEOROLOGISTS ARE TRACKING A 
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WIND 
GUSTS AND UP TO QUARTER SIZE HAIL.

THUNDERSTORM LOCATION: 
ALGONQUIN PROVINCIAL PARK TO LAKE OF TWO RIVERS TO 20 KM SOUTH OF 
LAKE OF TWO RIVERS 

MOTION: MOVING QUICKLY TO THE EAST AT 70 KM/H 

HAZARDS: 
WIND: DAMAGING (90 - 110 KM/H) 
HAIL: UP TO QUARTER SIZE (UP TO 2.5 CM) 
RAIN: HEAVY (15 - 25 MM) 

LOCATIONS IN THE PATH: 
BURNT ISLAND LAKE 
ALGONQUIN PROVINCIAL PARK 
WHITNEY 
UPPER MADAWASKA RIVER PROVINCIAL PARK 
LAKE TRAVERS 
MADAWASKA 
OPEONGO RIVER PROVINCIAL PARK 
BELL BAY PROVINCIAL PARK

LOCAL UTILITY OUTAGES ARE LIKELY. DAMAGE TO ROOFS, FENCES, SOFT 
SHELTERS OR TREES IS LIKELY. 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

END/OSPC