WUCN11 CWTO 130319

YELLOW WARNING - SEVERE THUNDERSTORM

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 11:19 P.M. EDT WEDNESDAY 12 AUGUST 2026.

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

YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - FOR:

      PRESCOTT AND RUSSELL

      WINCHESTER - NEWINGTON.



YELLOW LEVEL WARNING - SEVERE THUNDERSTORM - ENDED FOR:

      OTTAWA SOUTH - RICHMOND - METCALFE.



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

IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



UPDATED OR ENDED BY 12:18 A.M. EDT.



AT 11:19 P.M. EDT, A SEVERE THUNDERSTORM IS LOCATED OVER 

MOREWOOD. THIS SEVERE THUNDERSTORM IS MOVING SOUTHEAST AT 50 

KM/H. DAMAGING WIND GUSTS, UP TO QUARTER SIZE HAIL AND HEAVY RAIN 

ARE POSSIBLE. 



LOCATIONS AND NEARBY AREAS THAT COULD BE IMPACTED INCLUDE: 

MARIONVILLE, MOREWOOD, WINCHESTER, CHESTERVILLE, BERWICK, DUNBAR, 

FINCH, NEWINGTON



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. 



LARGE HAIL MAY CAUSE SIGNIFICANT DAMAGE AND INJURY. LOCAL UTILITY 

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

IS LIKELY. 



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 SOCIAL MEDIA USING 

(HASH)ONSTORM. 



FOR MORE INFORMATION: 

HTTPS://WWW.ONTARIO.CA/PAGE/BE-PREPARED-EMERGENCY.



HTTP://WEATHER.GC.CA



END/OSPC