827
WWCN11 CWTO 290933
YELLOW WARNING - SNOW SQUALL
FOR SOUTHERN ONTARIO
ISSUED BY ENVIRONMENT CANADA
AT 4:33 A.M. EST MONDAY 29 DECEMBER 2025.
---------------------------------------------------------------------
YELLOW LEVEL WARNING - SNOW SQUALL - FOR:
=NEW= NEWMARKET - GEORGINA - NORTHERN YORK REGION
=NEW= UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION.
YELLOW LEVEL WARNING - SNOW SQUALL - REPLACES YELLOW LEVEL WATCH -
SNOW SQUALL - FOR:
NEWMARKET - GEORGINA - NORTHERN YORK REGION
UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION.
---------------------------------------------------------------------
IMPACT LEVEL: HIGH
FORECAST CONFIDENCE: MODERATE
==DISCUSSION==
HAZARDOUS SNOW SQUALLS POSSIBLE THIS AFTERNOON INTO TUESDAY.
WHAT:
NEAR ZERO VISIBILITY AT TIMES IN LOCAL BLOWING SNOW.
TOTAL LOCAL SNOWFALL AMOUNTS OF 15 TO 25 CM.
WHEN:
BEGINNING NEAR MIDDAY AND EASING TO SCATTERED FLURRIES TUESDAY
AFTERNOON.
ADDITIONAL INFORMATION:
AN INITIAL BRIEF, INTENSE SNOW SQUALL IS EXPECTED NEAR MIDDAY ALONG
A COLD FRONT. A QUICK 5 CM OF SNOW IS EXPECTED FROM THIS SNOW SQUALL
AS WELL AS A RAPID TEMPERATURE DROP, LEADING TO ICY SURFACES.
LAKE EFFECT SNOW SQUALLS OFF GEORGIAN BAY WILL DEVELOP THIS
AFTERNOON. BLOWING SNOW AND POOR VISIBILITY WILL BE THE PRIMARY
CONCERN AS NORTHWESTERLY WIND GUSTS OF 70 TO 90 KM/H ARE EXPECTED.
TRAVEL MAY BE EXTREMELY HAZARDOUS. VISIBILITY MAY BE SUDDENLY
REDUCED TO NEAR ZERO AT TIMES. ROADS AND WALKWAYS MAY BE VERY
DIFFICULT TO NAVIGATE DUE TO ACCUMULATING SNOW. ROAD CLOSURES ARE
POSSIBLE. PREPARE FOR 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