HARRISBURG — With wintry weather and the potential for snow squalls expected across Pennsylvania into the weekend, the Pennsylvania Department of Transportation is urging motorists to slow down and use caution when traveling, particularly during periods of low visibility.

According to the National Weather Service, a snow squall is a brief but intense burst of heavy snow — up to 2 inches in 30 minutes — accompanied by strong winds of more than 30 mph and whiteout conditions that reduce visibility to less than a quarter mile. Because snow squalls can develop quickly and be highly localized, they can catch drivers off guard and lead to major transportation impacts, including multivehicle crashes.

While avoiding or delaying unnecessary travel during winter weather is the safest option, PennDOT offered the following guidance for motorists who must travel and encounter snow squalls or blowing or drifting snow:

• Slow down gradually and drive at a speed appropriate for conditions;

• Turn on headlights. If caught in a snow squall, activate hazard lights;

• Stay in your lane and increase following distance;

• Remain alert, look as far ahead as possible and be patient;

• Use defrosters and windshield wipers;

• Keep windows and mirrors clear of snow and ice;

• During whiteouts, pull off the roadway and stop only when it can be done safely;

• Do not stop in the travel lane, which can lead to chain-reaction crashes;

• Do not pass slow-moving vehicles or speed up to avoid a vehicle following too closely.

PennDOT also reminded drivers to buckle up, avoid impaired driving and eliminate distractions. Preliminary data from last winter shows 8,329 crashes on snowy, slushy or ice-covered roadways statewide, resulting in 29 fatalities and 2,959 injuries. Eleven of those killed were not wearing seat belts, and 17 fatalities involved drivers traveling too fast for conditions or leaving their lane of travel.

Drivers are also encouraged to keep an emergency kit in their vehicle.