A yellow snowfall warning means that significant snow is expected or already falling in your area, with conditions that could make travel and everyday activities more difficult.
If a yellow snowfall warning has been issued for your area, you may experience snow-covered roads, reduced visibility and travel delays. While yellow is the lowest level in Canada’s colour-coded weather alert system, it still means you should pay attention to changing conditions and prepare for possible disruptions.
Below, we explain what a yellow snowfall warning means, why it is issued, what conditions you can expect and how to prepare.
What Is a Yellow Snowfall Warning?
A yellow snowfall warning is a weather alert that indicates potentially hazardous snowfall is expected or occurring.
The warning is intended to make people aware of weather conditions that could affect travel, outdoor activities and daily routines. Snow may accumulate on roads and sidewalks, visibility may be reduced and travel times may increase.
The severity and impact of snowfall can vary significantly depending on location, temperature, wind and the speed at which snow accumulates.
A yellow snowfall warning may be updated if weather conditions change. More significant or dangerous snowfall events may result in an Orange Warning – Snowfall or Red Warning – Snowfall.
How Serious Is a Yellow Snowfall Warning?
A yellow snowfall warning can create hazardous travel conditions and disruptions to daily activities. Snow accumulation and reduced visibility may make roads difficult to navigate and cause transportation delays.
The seriousness of the warning depends on factors such as snowfall amounts, intensity, duration, timing and local conditions. Snowfall occurring during busy travel periods may cause greater disruptions.
Drivers should monitor current road conditions, allow additional travel time and adjust their driving for snow-covered or slippery roads.
Yellow Snowfall Warning vs Orange Snowfall Warning
A yellow snowfall warning indicates the potential for moderate, localized or short-term impacts, while an orange snowfall warning indicates that significant impacts are likely.
Yellow warnings may involve hazardous roads, reduced visibility and transportation delays. Orange warnings indicate the potential for more serious or widespread travel disruptions and difficult conditions that may last for an extended period.
Yellow Snowfall Warning vs Red Snowfall Warning
A yellow snowfall warning represents the lowest level of potential impact, while a red snowfall warning represents the highest level in Canada’s colour-coded weather alert system.
Yellow warnings may create hazardous travel and localized disruptions. Red warnings indicate very dangerous conditions and significant, widespread impacts that may make travel extremely difficult or impossible.
What Should You Do During a Yellow Snowfall Warning?
Preparing before heavy snow arrives can help reduce the impact of hazardous winter conditions.
Before the Snow Arrives
Monitor current forecasts and weather warnings for your area.
Consider completing necessary travel or outdoor activities before conditions deteriorate.
Homeowners may also want to make sure snow shovels, snow blowers and other winter equipment are easily accessible.
While Snow Is Falling
Avoid unnecessary travel when conditions are poor.
If you must travel, allow additional time and be prepared for slower traffic and changing road conditions.
Continue monitoring weather updates in case the warning is changed or upgraded.
Driving During Heavy Snow
Drivers should reduce their speed and increase the distance between vehicles.
Snow-covered roads can significantly increase stopping distances.
Keep vehicle lights on when visibility is poor and avoid sudden braking or acceleration whenever possible.
After the Snowfall Ends
Hazardous conditions may continue after the snow stops falling.
Roads and sidewalks may remain slippery, and snow removal operations may take time to clear affected areas.
Continue using caution when driving or walking outdoors.
Why Is a Yellow Snowfall Warning Issued?
Snowfall warnings are issued to help people prepare for potentially hazardous winter weather.
A warning may be issued when significant snow is expected to affect a particular area.
Possible impacts can include:
- Snow-covered roads
- Slippery sidewalks
- Reduced visibility
- Difficult driving conditions
- Longer commute times
- Public transit delays
- Flight delays or cancellations
- Difficult snow removal conditions
The impact of a snowstorm can vary significantly from one community to another.
For example, the same amount of snow may create different conditions in Toronto, Ottawa, Calgary or Montreal because of differences in climate, infrastructure and typical winter weather.
This is why checking your local weather forecast and current weather warnings is important whenever significant snow is expected.
How Much Snow Can Fall During a Yellow Snowfall Warning?
The amount of snow expected during a yellow snowfall warning can vary depending on where you live.
Canada has a wide range of climates, and snowfall conditions can be very different across the country.
Some Canadian cities regularly receive significant amounts of snow during the winter, while others experience heavy snowfall less frequently.
The impact of a snowfall event can depend on several factors, including:
- Total snowfall accumulation
- How quickly the snow falls
- Temperature
- Wind speed
- Visibility
- Existing snow accumulation
- Road conditions
A fast-moving storm that produces heavy snow over several hours may create more difficult travel conditions than the same amount of snow falling gradually over a longer period.
You can learn more about typical winter conditions by exploring average snowfall in Canada and our Canadian city snowfall guides.
Yellow Warning – Snowfall FAQs
A yellow snowfall warning means snowfall may cause moderate, localized or short-term impacts, including hazardous travel and transportation delays.
Snowfall amounts vary depending on the event and location. Check the specific warning issued for your area for forecast accumulation amounts.
Not necessarily. Whether you should stay home depends on local road conditions, the intensity of the snowfall and official guidance.
There is no standard duration. The warning may remain in effect for several hours or longer depending on the snowfall event.
Yes. The warning may be upgraded if heavier snowfall or more significant impacts are expected.
