WOCN11 CWTO 202101

YELLOW ADVISORY - FROST

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 5:01 P.M. EDT TUESDAY 20 OCTOBER 2026.

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YELLOW LEVEL ADVISORY - FROST - FOR:

      ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION

      MISSISSAUGA - BRAMPTON.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



PATCHY FROST IS EXPECTED TONIGHT, MAINLY FOR AREAS AWAY FROM LAKE 

ONTARIO.



TAKE PREVENTATIVE MEASURES TO PROTECT COLD-SENSITIVE PLANTS, TREES, 

AND CROPS. COVER UP PLANTS, ESPECIALLY THOSE IN FROST-PRONE AREAS. 



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.



HTTP://WEATHER.GC.CA



END/OSPC



WOCN11 CWTO 202101

YELLOW ADVISORY - FROST

FOR SOUTHERN ONTARIO

UPDATED BY ENVIRONMENT CANADA

AT 5:01 P.M. EDT TUESDAY 20 OCTOBER 2026.

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

YELLOW LEVEL ADVISORY - FROST - FOR:

      NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION.



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

IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



PATCHY FROST IS EXPECTED TONIGHT, MAINLY FOR AREAS AWAY FROM LAKE 

ERIE.



TAKE PREVENTATIVE MEASURES TO PROTECT COLD-SENSITIVE PLANTS, TREES, 

AND CROPS. COVER UP PLANTS, ESPECIALLY THOSE IN FROST-PRONE AREAS. 



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.



HTTP://WEATHER.GC.CA



END/OSPC