A winter storm warning is not a snow day announcement. It means the National Weather Service has determined that dangerous winter weather is either already happening or is about to arrive, and that it’s serious enough to threaten lives and make travel impossible.

Here’s how the winter weather alert system works, what each level actually means, and what families with kids should do at each stage.

The Four Alert Levels (Lowest to Highest)

Winter weather alerts aren’t just on/off. They come in stages, and each stage calls for a different response.

Winter Weather Advisory

This is the mildest alert. An advisory means winter weather conditions are expected to cause significant inconvenience and may be hazardous, but not life-threatening if you’re cautious.

Typical triggers: 3 to 5 inches of snow in 12 hours, a light glaze of ice, or blowing snow reducing visibility.

Think of an advisory like a yellow traffic light. Things are about to get slippery. Slow down, allow extra time, and be aware, but you don’t need to cancel everything.

Winter Storm Watch

A watch means a significant winter storm is possible within the next 24 to 48 hours. Conditions are coming together, the cold air, the moisture, the timing, but forecasters aren’t certain enough yet to issue a full warning.

A watch covers a large area and gives you time to prepare. Use it. Stock up on groceries, charge your devices, fill up the gas tank, and make sure you know where the flashlights are.

Think of a watch like a yellow light turning red. Something is coming. Get ready now so you’re not scrambling later.

Winter Storm Warning

This is the serious one. A warning means heavy snow, significant ice, or both are expected, and that travel will become difficult or impossible.

The NWS issues a winter storm warning when they expect at least 6 inches of snow in 12 hours, or 8 inches in 24 hours, or significant ice accumulation (typically a quarter inch or more). These thresholds vary slightly by region, what counts as a warning in Atlanta is different from what counts in Minneapolis.

When a warning is issued, the message is: don’t travel unless you have to. If you’re already out, come home. If you have kids in school, know your district’s early dismissal plan.

Blizzard Warning

The rarest and most dangerous. A blizzard warning means sustained winds or gusts of 35 mph or more combined with heavy snow or blowing snow that will reduce visibility to near zero for at least three hours.

It’s not just about snow totals. Blizzard conditions are dangerous because whiteout visibility means you can become disoriented outdoors within feet of your own home. People have died in blizzards while trying to walk from their house to their car. When a blizzard warning is issued, stay inside. That’s the whole plan.

What Different Types of Winter Storms Actually Do

Not all winter storms are the same. The type of storm determines the specific dangers.

Heavy snow is the most common. It piles up on roads, weighs down power lines and tree branches, and makes driving treacherous. The main risk: car accidents, roof collapses on older structures, and extended power outages.

Ice storms are often more dangerous than heavy snow. Freezing rain coats every surface with a layer of ice that’s nearly invisible and extraordinarily slippery. A quarter inch of ice can bring down power lines and make roads impassable. More injuries happen from ice falls than from snowstorms.

Freezing rain is rain that falls as liquid but freezes on contact with cold surfaces. Roads, sidewalks, and car windshields ice over within minutes. The hazard isn’t just slipping, ice accumulates on tree branches and power lines, causing widespread outages that can last days.

Blowing and drifting snow can reduce visibility to zero even when snowfall has stopped. Snow drifts can block roads, trap vehicles, and make walking outside genuinely disorienting.

What Your Family Should Do

Before a Watch (While You Still Have Time)

  • Stock enough food and water for 3 to 5 days, storms can knock out power longer than people expect
  • Fill prescriptions and have any necessary medications on hand
  • Charge all devices and find your portable chargers
  • Know where your emergency kit is: flashlights, batteries, blankets, a battery-powered or hand-crank weather radio
  • Check on elderly neighbors or family members who may need help

When a Warning Is Issued

  • Stay home if at all possible. Most winter storm deaths involve cars.
  • If you must drive, clear your entire car, not just a peephole in the windshield. Snow on your roof becomes a projectile for the car behind you.
  • Keep kids inside. Frostbite can develop in under 30 minutes in severe wind chill. Even a “quick trip outside” becomes dangerous when temperatures drop below 0°F with wind.
  • Run cold water to a trickle in pipes along exterior walls to prevent freezing.
  • Know where your water shutoff valve is in case a pipe bursts.

Talking to Kids About It

Kids handle winter storms better when they understand what’s happening and have a job to do.

Explain it simply: “The weather service says there’s going to be a lot of snow and ice tonight, so we’re staying home tomorrow and making sure we have everything we need. Want to help me check the flashlights?”

Giving kids a small task, finding the flashlights, helping stock the snack shelf, making a blanket fort in the living room, turns a potentially scary situation into something manageable and even fun. The same principle that works for talking to kids about big emotions works here: involve them, give them agency, stay calm yourself.

After the Storm

Don’t rush outside the moment it stops snowing. Snow can continue blowing and drifting, roads may still be ice-covered, and downed power lines are often hidden under snow.

Before kids go out to play, check for downed lines in the yard or street. If you find one, keep everyone inside and call 911. Never assume a downed line is dead.

If your power goes out, avoid using a gas stove or generator indoors, both produce carbon monoxide. Dress in layers and stay in the warmest interior room. Check your weather radar to see when the storm is passing.

The Takeaway

Advisory means slow down and be aware. Watch means prepare now. Warning means stay home. Blizzard warning means stay inside completely.

Winter storms are predictable enough that you almost always have time to get ready, the NWS typically issues a watch 24 to 48 hours before major events. The families that come through storms easiest are the ones who use that window to prepare instead of waiting until the warning is issued.

For more on understanding weather alerts and what to do when storms hit, explore the weather explained section, including how to read a severe thunderstorm warning and how weather radar works.