What is the difference between a winter storm warning and a watch?

A watch means conditions are favorable for a winter storm and you should prepare. A warning means a dangerous storm is happening or imminent and you should take protective action immediately.

Who issues winter storm warnings in the US?

The National Weather Service (NWS) issues winter storm warnings, watches, and advisories, and local emergency management agencies provide additional guidance.

What should I keep in my car during a winter storm warning?

Keep an emergency kit with blankets, water, snacks, a flashlight, a phone charger, and an ice scraper, and avoid non-essential travel whenever possible.

Winter Storm Warning: What It Means and How to Prepare

Winter Storm Warning: What It Actually Means

A winter storm warning is issued when hazardous winter weather is occurring, imminent, or highly likely. In the United States, the National Weather Service (NWS) issues these warnings when a significant combination of heavy snow, ice, sleet, or dangerous wind chill is expected to make travel and outdoor activity dangerous. Understanding the term helps you act early rather than react late.

Warning vs. watch vs. advisory

Winter storm watch: Conditions are favorable for a winter storm; stay alert and be ready.
Winter storm warning: A dangerous winter storm is happening or about to happen; take protective action now.
Winter weather advisory: Winter conditions are expected that can cause inconvenience and require caution, but are generally less severe than a warning.

How to Prepare When a Winter Storm Warning Is Issued

Limit travel: Postpone non-essential trips. If you must drive, keep an emergency kit with blankets, water, and a phone charger.
Prepare your home: Ensure heating works, have flashlights and batteries ready, and keep pipes from freezing by letting faucets drip.
Stock essentials: Keep several days of food, water, and any medications on hand in case of power outages.
Protect people and pets: Bring animals indoors and check on elderly or vulnerable neighbors.

Staying informed

During a winter storm warning, rely on the NWS and local emergency management for updates. Sign up for local alerts, keep a battery or hand-crank radio available, and know how to report or respond to a power outage in your area.

After the storm

Once the warning is lifted, be cautious: roads may still be icy, downed power lines can be hazardous, and clearing heavy snow is physically demanding. Take breaks when shoveling and watch for signs of overexertion.

Bottom Line

A winter storm warning is a signal to act, not just to watch. Knowing how it differs from a watch or advisory, preparing your home and car, and staying tuned to official updates are the steps that keep you and your family safe.