488
WWCN11 CWTO 290342
YELLOW WATCH - SNOW SQUALL
FOR SOUTHERN ONTARIO
UPDATED BY ENVIRONMENT CANADA
AT 10:42 P.M. EST SUNDAY 28 DECEMBER 2025.
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YELLOW LEVEL WATCH - SNOW SQUALL - FOR:
NEWMARKET - GEORGINA - NORTHERN YORK REGION
UXBRIDGE - BEAVERTON - NORTHERN DURHAM REGION.
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IMPACT LEVEL: HIGH
FORECAST CONFIDENCE: MODERATE
==DISCUSSION==
HAZARDOUS SNOW SQUALLS POSSIBLE MONDAY AFTERNOON INTO TUESDAY.
WHAT:
NEAR ZERO VISIBILITY AT TIMES IN LOCAL BLOWING SNOW.
TOTAL LOCAL SNOWFALL AMOUNTS OF 15 TO 25 CM.
STRONG WIND GUSTS OF 70 TO 90 KM/H.
WHEN:
MONDAY AFTERNOON EASING TO SCATTERED FLURRIES TUESDAY AFTERNOON.
ADDITIONAL INFORMATION:
A COLDER AIR MASS IN THE WAKE OF A DEPARTING LOW PRESSURE SYSTEM
WILL RESULT IN THE DEVELOPMENT OF LAKE EFFECT SNOW SQUALLS OFF
GEORGIAN BAY. 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. PROPERTY OR TREE DAMAGE IS 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
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