A quick-hitting system Monday brings the potential for light snow accumulation in parts of the area. Let’s walk you through the timing, totals, impacts and caveats. As it stands right now, this is a light event. However, if low pressure strengthens off the coast, that could pull cooler air down and up totals a bit.

Almost 82 million Americans are expected to travel at least 50 miles, with most on the roads between Tuesday and Wednesday afternoon

Precipitation is simply when water falls down to Earth’s surface as part of the natural water cycle. Precipitation can take several forms, including rain, snow, ice, and sleet and is forecast using satellite data and mathematical formulas.

Some major U.S. airlines are allowing passengers traveling to, from or through specific airports in the Northeast and mid-Atlantic this week to change their flights free of charge due to expected delays from forecasted weather conditions. “A large area ...