What Is a Snow Squall Warning?

In 2018, the National Weather Service started issuing Snow Squall Warnings. A snow squall warning will be issued when a snow squall is developing or is occurring. The warnings will target a small area and will only be in effect for 30 to 60 minutes.

What is a snow squall?

Snow squalls, often associated with strong cold fronts, are a key wintertime weather hazard. They move in and out quickly and typically last less than an hour. Snow squalls are intense but limited duration periods of moderate to heavy snowfall, accompanied by gusty surface winds resulting in reduced visibilities and whiteout conditions.

The sudden white-out conditions combined with falling temperatures produce icy roads in just a few minutes. Squalls can occur where there is no large-scale winter storm in progress and might only produce minor accumulations. Snow squalls can cause localized extreme impacts to the traveling public and to commerce for brief periods of time. Unfortunately, there is a long history of deadly traffic accidents associated with snow squalls. Although snow accumulations are typically an inch or less, the added combination of gusty winds, falling temperatures and quick reductions in visibility can cause extremely dangerous conditions for motorists.

How long does a snow squall warning last?

The warnings will target a small area and will only be in effect for 30 to 60 minutes.

It’s important to be aware of the potential for snow squalls and to take steps to prepare and stay safe if you encounter one. This can include checking weather forecasts regularly, carrying a winter emergency kit in your vehicle, and allowing extra time for travel during snowy weather. If you’re driving in a snow squall, slow down, be extra cautious, and be prepared for sudden changes in road conditions.