017
WOCN11 CWTO 201540
YELLOW ADVISORY - FROST
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 11:40 A.M. EDT WEDNESDAY 20 MAY 2026.
---------------------------------------------------------------------
YELLOW LEVEL ADVISORY - FROST - FOR:
=NEW= CALEDON
=NEW= UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION
=NEW= NEWMARKET - GEORGINA - NORTHERN YORK REGION
=NEW= HURON - PERTH
=NEW= WATERLOO - WELLINGTON
=NEW= DUFFERIN - INNISFIL
=NEW= OWEN SOUND - BLUE MOUNTAINS - NORTHERN GREY COUNTY
=NEW= SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY
=NEW= HANOVER - DUNDALK - SOUTHERN GREY COUNTY
=NEW= BARRIE - ORILLIA - MIDLAND
=NEW= PETERBOROUGH - KAWARTHA LAKES
=NEW= BANCROFT - BON ECHO PARK
=NEW= PLEVNA - SHARBOT LAKE - WESTERN LANARK COUNTY
=NEW= PARRY SOUND - MUSKOKA
=NEW= HALIBURTON
=NEW= RENFREW - PEMBROKE - BARRY'S BAY
=NEW= ALGONQUIN
=NEW= BURK'S FALLS - BAYFIELD INLET.
---------------------------------------------------------------------
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 IN ONTARIO, SEND AN EMAIL TO
ONSTORM(AT)EC.GC.CA OR POST REPORTS ON X USING (HASH)ONSTORM.
HTTP://WEATHER.GC.CA
END/OSPC
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page