What Is a Winter Storm Watch?
A Winter Storm Watch means conditions are favourable for a significant winter storm to develop within the next 48 hours. While the storm is not certain to occur, there is enough potential for hazardous winter weather that people should begin preparing.
A Winter Storm Watch may be issued when heavy snow, freezing rain, ice pellets, or strong winds are expected to create dangerous travel conditions.
What Is the Difference Between a Winter Storm Watch and a Winter Storm Warning?
A Winter Storm Watch means significant winter weather is possible.
A Winter Storm Warning means dangerous winter weather is expected or already occurring, and action should be taken to protect yourself and avoid unnecessary travel.
In simple terms:
- Watch: Be prepared.
- Warning: Take action.
What Conditions Can Trigger a Winter Storm Watch?
Environment and Climate Change Canada may issue a Winter Storm Watch when forecast models indicate the potential for a major winter weather event.
A watch may be issued for:
- Heavy snowfall
- Freezing rain
- Ice pellets
- Blowing snow
- Strong winds combined with snow
- Rapidly deteriorating travel conditions
Forecast confidence is high enough to alert the public, but the exact timing, location, or severity may still change.
What Hazards Can a Winter Storm Bring?
A winter storm can create multiple hazards at once, including:
- Snow-covered roads
- Reduced visibility
- Slippery sidewalks and highways
- Ice accumulation
- Fallen tree branches
- Power outages
- Flight delays and cancellations
Conditions can become dangerous quickly, especially if snow and ice occur together.
What Should You Do During a Winter Storm Watch?
When a Winter Storm Watch is issued:
- Monitor weather forecasts frequently.
- Prepare an emergency kit for your home and vehicle.
- Check that flashlights, batteries, and mobile devices are fully charged.
- Stock essential food, water, and medications.
- Consider adjusting travel plans if severe weather is expected.
- Ensure your vehicle is equipped for winter driving.
Preparing early can help you avoid unnecessary travel and reduce risks if the storm intensifies.
How Long Does a Winter Storm Watch Last?
A Winter Storm Watch remains in effect until:
- It is upgraded to a Winter Storm Warning.
- Forecast confidence decreases and the watch is cancelled.
- The threat of significant winter weather has passed.
Weather forecasts are updated regularly as storm systems develop.
