WOCN12 CWTO 201526

YELLOW ADVISORY - FROST

FOR NORTHERN ONTARIO

ISSUED BY ENVIRONMENT CANADA

AT 11:26 A.M. EDT WEDNESDAY 20 MAY 2026.

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YELLOW LEVEL ADVISORY - FROST - FOR:

=NEW= CITY OF THUNDER BAY

=NEW= IGNACE - ENGLISH RIVER

=NEW= ATIKOKAN - UPSALA - QUETICO

=NEW= SUPERIOR WEST

=NEW= SIOUX LOOKOUT - SAVANT LAKE

=NEW= NIPIGON - MARATHON - SUPERIOR NORTH

=NEW= WAWA - WHITE RIVER - PUKASKWA

=NEW= SAULT STE. MARIE - SUPERIOR EAST

=NEW= GREATER SUDBURY AND VICINITY

=NEW= CHAPLEAU - GOGAMA

=NEW= KIRKLAND LAKE - TEMISKAMING SHORES - TEMAGAMI

=NEW= ELLIOT LAKE - RANGER LAKE

=NEW= BLIND RIVER - THESSALON

=NEW= ESPANOLA - KILLARNEY

=NEW= NORTH BAY - WEST NIPISSING.



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IMPACT LEVEL: MODERATE

FORECAST CONFIDENCE: HIGH



==DISCUSSION==



FROST IS EXPECTED TONIGHT.



TEMPERATURES ARE EXPECTED TO FALL TO NEAR OR BELOW THE FREEZING MARK 

OVERNIGHT INTO THURSDAY MORNING.



DAMAGE TO PLANTS, TREES, AND CROPS IS POSSIBLE. 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, SEND AN EMAIL TO 

ONSTORM(AT)EC.GC.CA OR POST REPORTS ON X USING (HASH)ONSTORM.



HTTP://WEATHER.GC.CA



END/OSPC