WWCN12 CWTO 120010

YELLOW WARNING - RAINFALL

FOR NORTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 8:10 P.M. EDT FRIDAY 11 SEPTEMBER 2026.

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YELLOW LEVEL WARNING - RAINFALL - FOR:

=NEW= GULL BAY - BLACK STURGEON LAKE

      ATIKOKAN - UPSALA - QUETICO

      KAKABEKA FALLS - WHITEFISH LAKE - ARROW LAKE.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



RAIN, AT TIMES HEAVY, AND THUNDERSTORMS TONIGHT. 



WHAT: 

TOTAL RAINFALL AMOUNTS IN EXCESS OF 50 MM. 

PEAK RAINFALL RATES OF 40 MM IN AN HOUR. 



WHEN: 

CONTINUING THROUGH TONIGHT. 



ADDITIONAL INFORMATION: 

RAINFALL AMOUNTS WILL BE HIGHLY VARIABLE ACROSS THE REGION. RAIN 

WILL TAPER TO SCATTERED SHOWERS AFTER MIDNIGHT.



WATER WILL LIKELY POOL ON ROADS AND IN LOW-LYING AREAS. VISIBILITY 

WILL LIKELY BE SUDDENLY REDUCED AT TIMES. DON'T DRIVE THROUGH 

FLOODED ROADWAYS. WATCH FOR WASHOUTS NEAR RIVERS, CREEKS AND 

CULVERTS. 



FOR INFORMATION CONCERNING FLOODING, PLEASE CONSULT YOUR LOCAL 

CONSERVATION AUTHORITY OR ONTARIO MINISTRY OF NATURAL RESOURCES 

OFFICE. VISIT HTTPS://WWW.ONTARIO.CA/PAGE/FLOODS FOR THE LATEST 

DETAILS. 



PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY 

ENVIRONMENT CANADA. TO REPORT SEVERE WEATHER, SEND AN EMAIL TO 

ONSTORM(AT)EC.GC.CA OR POST REPORTS ON SOCIAL MEDIA USING 

(HASH)ONSTORM.



HTTP://WEATHER.GC.CA



END/OSPC