654
WWCN11 CWTO 290947
YELLOW WATCH - SNOW SQUALL
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 4:47 A.M. EST MONDAY 29 DECEMBER 2025.
---------------------------------------------------------------------
YELLOW LEVEL WATCH - SNOW SQUALL - FOR:
=NEW= SARNIA - LAMBTON
=NEW= STRATHROY - KOMOKA - WESTERN MIDDLESEX COUNTY
=NEW= HALTON HILLS - MILTON
=NEW= CALEDON
=NEW= ORANGEVILLE - GRAND VALLEY - SOUTHERN DUFFERIN COUNTY
=NEW= SHELBURNE - MANSFIELD - NORTHERN DUFFERIN COUNTY.
---------------------------------------------------------------------
IMPACT LEVEL: HIGH
FORECAST CONFIDENCE: MODERATE
==DISCUSSION==
BRIEF, INTENSE SNOWFALL AND BLOWING SNOW EXPECTED LATE THIS MORNING
INTO THIS AFTERNOON.
WHAT:
NEAR ZERO VISIBILITY IN HEAVY SNOW AND BLOWING SNOW.
SNOWFALL AMOUNTS UP TO 5 CM WITHIN ONE HOUR.
WHEN:
LATE THIS MORNING INTO EARLY THIS AFTERNOON.
ADDITIONAL INFORMATION:
A SHARP COLD FRONT IS EXPECTED TO TRACK OVER THE AREA. ALONG THIS
COLD FRONT A SUDDEN INTENSE SNOWFALL IS EXPECTED. A QUICK 5 CM OF
SNOW IS POSSIBLE FROM THIS SNOW SQUALL AS WELL AS A RAPID
TEMPERATURE DROP, LEADING TO ICY SURFACES. POOR VISIBILITY IN
BLOWING SNOW IS LIKELY AS STRONG NORTHWESTERLY WIND GUSTS ARE
EXPECTED.
TRAVEL MAY BE EXTREMELY HAZARDOUS. ROAD CLOSURES ARE POSSIBLE.
PREPARE FOR THE POSSIBILITY OF QUICKLY CHANGING AND DETERIORATING
TRAVEL CONDITIONS.
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.
FOR MORE INFORMATION ABOUT THE ALERTING PROGRAM, PLEASE VISIT:
HTTPS://WWW.CANADA.CA/EN/SERVICES/ENVIRONMENT/WEATHER/SEVEREWEATHER/WEATHER-ALERTS/COLOUR-CODED-ALERTS.
HTTP://WEATHER.GC.CA
END/OSPC
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page