Weather Hazards (Winter) Outlooks - Ontario

Last Update: Mar 17, 2022 - 9:15 PM

Hello! :) This is the home for Instant Weather’s seasonal weather hazards outlooks. These outlooks will provide information on any inclement weather within the next 2 days during winter across Southern and Northern Ontario

We aim to update the outlooks nightly by 12 AM ET although they occasionally may be posted late if we want to go over more data. The Day 1 outlook may be updated in the morning or early afternoon if necessary.

Special outlooks may be issued occasionally for high-impact weather events outside the 2-day timeframe to give more advance notice when confidence is high enough.

Bookmark this page and be sure to check back daily for all the weather information you need to know for the next 48 hours and beyond.

Detailed criteria for the different types of hazards that our outlooks cover can be found at the bottom of this page.

Tip: Click on the map to view the full forecast including a written discussion and the ability to enlarge the map(s).

Southern Ontario

Day 1 Outlooks

Day 2 Outlooks

Snow/Ice Day Forecast

Special Forecast

Northern Ontario

Day 1 Outlooks

Day 2 Outlooks

 

Special Forecast

 

Outlook Criteria

Snowfall Outlook

Hazard Type Southern Ontario Northern Ontario
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Snow
 Snow with accumulation of 2cm or more is expected which may cause hazardous driving conditions. Snow with accumulation of 10cm or more is expected which may cause hazardous driving conditions.

Weather Hazards Outlook

Hazard Type Southern Ontario Northern Ontario
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Heavy Fog
 Fog is expected which will severely reduce visibility for 4 hours or longer. Fog is expected which will severely reduce visibility for 4 hours or longer.
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Flash Freeze		 A rapid drop in temperature is expected which may cause a flash freeze and result in icy road conditions. A rapid drop in temperature is expected which may cause a flash freeze and result in icy road conditions.
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Extreme Cold
 Extreme cold temperatures are expected with the temperature reaching -25°C or colder. This could present a risk to those not properly prepared for the cold weather. Extreme cold temperatures are expected with the temperature reaching -30°C or colder. This could present a risk to those not properly prepared for the cold weather.
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Wind Gusts
 Wind gusts in excess of 80km/h are expected which may cause property damage or power outages. Wind gusts in excess of 80km/h are expected which may cause property damage or power outages.
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Heavy Rainfall
 Heavy rainfall is expected with in excess of 25mm of rainfall within a 24 hour period. Heavy rainfall is expected with in excess of 25mm of rainfall within a 24 hour period.
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Mixed Precip.		 Mixed precipitation in the form of rain, snow, freezing rain or ice pellets is expected which may cause hazardous driving conditions. Mixed precipitation in the form of rain, snow, freezing rain or ice pellets is expected which may cause hazardous driving conditions.
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Freezing Rain		 Freezing rain is expected which could cause icy road conditions and power outages. Freezing rain is expected which could cause icy road conditions and power outages.
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Ice Pellets		 Ice pellets are expected which may cause hazardous driving conditions. Ice pellets are expected which may cause hazardous driving conditions.
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Snow Squalls
 Snow squalls are possible with accumulation of at least 10cm which may cause hazardous driving conditions. Snow squalls are possible with accumulation of at least 10cm which may cause hazardous driving conditions.
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Blizzard Possible
 Snow combined with strong wind gusts are expected to significantly reduce visibility for at least 4 hours. Blizzard conditions can make travel near impossible through affected areas. Snow combined with strong wind gusts are expected to significantly reduce visibility for at least 4 hours. Blizzard conditions can make travel near impossible through affected areas.