WWCN11 CWTO 110320

YELLOW WARNING - SNOW SQUALL

FOR SOUTHERN ONTARIO

ISSUED BY ENVIRONMENT CANADA

AT 10:20 P.M. EST WEDNESDAY 10 DECEMBER 2025.

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YELLOW LEVEL WARNING - SNOW SQUALL - FOR:

=NEW= NEWMARKET - GEORGINA - NORTHERN YORK REGION.



YELLOW LEVEL WARNING - SNOW SQUALL - REPLACES YELLOW LEVEL WATCH - 

SNOW SQUALL - FOR:

      NEWMARKET - GEORGINA - NORTHERN YORK REGION.



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IMPACT LEVEL: HIGH

FORECAST CONFIDENCE: MODERATE



==DISCUSSION==



SNOW SQUALLS ARE EXPECTED TONIGHT THROUGH THURSDAY. 



WHAT: 

TOTAL LOCAL SNOWFALL AMOUNTS OF 20 TO 35 CM. THE HIGHEST AMOUNTS ARE 

EXPECTED TO REMAIN NORTH OF NEWMARKET AND WEST OF GEORGINA. 

SIGNIFICANTLY REDUCED VISIBILITY IN HEAVY SNOW AND LOCAL BLOWING 

SNOW. 



WHEN: 

TONIGHT THROUGH THURSDAY. 



ADDITIONAL INFORMATION: 

SNOW SQUALLS ARE EXPECTED TO AFFECT THE AREA TONIGHT THROUGH 

THURSDAY BEFORE WEAKENING THURSDAY NIGHT. SNOWFALL AMOUNTS WILL BE 

HIGHLY VARIABLE ACROSS THE AREA.



TRAVEL MAY BE EXTREMELY HAZARDOUS. VISIBILITY MAY BE SUDDENLY 

REDUCED TO NEAR ZERO AT TIMES. ROAD CLOSURES ARE POSSIBLE. 



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