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Understanding Blizzard Alerts: A Comprehensive Guide

June 18, 2026 · The Clime Team
Understanding Blizzard Alerts: A Comprehensive Guide

Blizzards are severe winter storms characterized by heavy snowfall or blowing snow, strong winds, and reduced visibility. In the United States, the National Weather Service (NWS) issues blizzard warnings to alert the public of impending blizzard conditions.

What Defines a Blizzard?

A blizzard is defined by the NWS as a storm with the following criteria:

  • Wind Speed: Sustained winds or frequent gusts of at least 35 mph (56 km/h).
  • Visibility: Reduced visibility to less than a quarter mile (0.4 km) due to falling or blowing snow.
  • Duration: These conditions must persist for at least three hours.

It's important to note that temperatures do not have to be below a certain threshold for a blizzard to occur. However, below-freezing temperatures combined with strong winds can create dangerously low wind chill values. (weather.com)

Blizzard Warnings: What Do They Mean?

A blizzard warning is issued when the NWS forecasts that blizzard conditions are imminent or occurring. This warning indicates that individuals should take immediate action to protect themselves from the severe weather. (weather.gov)

Safety Tips During a Blizzard

Blizzards can be life-threatening. To stay safe:

  • Stay Informed: Monitor local weather updates and heed all warnings from the NWS.
  • Limit Travel: Avoid traveling unless absolutely necessary. If you must travel, ensure your vehicle is equipped with a winter survival kit, including blankets, food, water, and a flashlight. (weather.gov)
  • Dress Appropriately: Wear multiple layers of clothing to retain body heat. (cdc.gov)
  • Seek Shelter: If caught outside, find shelter immediately.
  • Stay Indoors: Remain indoors during the storm to avoid exposure to the elements.

What to Do if Stranded During a Blizzard

If you become stranded in your vehicle during a blizzard:

  • Stay in the Vehicle: Your vehicle provides shelter from the cold and wind.
  • Signal for Help: Use hazard lights or a brightly colored cloth to signal rescuers.
  • Conserve Fuel: Run the engine and heater for about 10 minutes every hour, ensuring the exhaust pipe is clear of snow to prevent carbon monoxide buildup. (cluballiance.aaa.com)

Conclusion

Understanding blizzards and the associated warnings is crucial for safety during severe winter weather. By staying informed and prepared, you can protect yourself and others from the dangers posed by blizzards.

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