WUCN11 CWTO 190109

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 9:09 P.M. EDT MONDAY 18 MAY 2026.

---------------------------------------------------------------------

YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

      DEEP RIVER - WHITNEY - EASTERN ALGONQUIN PARK.



---------------------------------------------------------------------

IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 11:07 P.M. EDT.



AT 9:08 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: 

30 KM WEST OF ALGONQUIN PROVINCIAL PARK TO 25 KM SOUTHWEST OF 

DEUX-RIVIERES TO DEUX-RIVIERES 



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) 



LOCATIONS IN THE PATH: 

ROLPHTON 

DEEP RIVER



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