Illinois Weather Alert: What Exactly Is a Snow Squall?

These weather forecasters and their lingo, right? Last year we were told that windchill (a measure of how cold people and animals feel when outside, based on the combined effect of the actual air temperature and wind speed) was not going to be called that anymore, and would be given a new name (click here for details).

Lately in weather forecasting in Illinois, you’ve probably heard the term “snow squall” being tossed around a lot, and if you’re like most of us, you might be wondering, “Okay… what’s that, exactly?” Snow squalls aren’t just your average snowstorm; they’re short-lived but can be seriously dangerous, especially on Illinois roads.

We experienced some snow squalls this morning, and the weather people seem to think that more are on the way.

Let's Get To The Definition Of Snow Squall

A snow squall is basically a sudden, intense burst of snow combined with strong, gusty winds.

Unlike a steady snow that drifts down for hours, a squall can reduce visibility to near zero in minutes. That’s why the National Weather Service (NWS) warns drivers to take them seriously. The intense snow is usually localized, meaning one stretch of highway might be perfectly clear while another is experiencing whiteout conditions.

In Illinois, this matters a lot. We're no strangers to intense winter weather, but snow squalls are tricky because they strike quickly and often without much warning. You might be driving along thinking it’s a clear morning, and suddenly visibility drops, roads become slick, and traffic slows, or worse, accidents happen. In fact, many squall-related accidents in the Midwest are caused by drivers underestimating just how fast conditions can change.

So, What Are We Supposed To Do When Snow Squalls Are Forecasted?

The good news is there are ways to stay safe:

• Slow down and give yourself extra space if you see sudden heavy snow or blowing snow.

• Avoid sudden lane changes or hard braking, which can lead to spinouts.

• Watch for alerts on your phone, radio, or in-car navigation apps. The National Weather Service issues specific snow squall warnings when conditions are expected to be dangerous.

So, the next time you hear the term “snow squall” in the forecast, remember that it’s not just another snowy day. It’s a quick, powerful weather event that demands respect. Check your routes, give yourself a little extra time, and if the squall hits while you’re driving, slow down and stay safe. Taking things a little easier on the roads could make all the difference.