The first of two storms this week will move into Arizona on Tuesday. Valley rain chances are at about 20% during the afternoon but climb to 80% by the evening. Up to a half-inch of rain is possible. Tuesday will be a First Alert weather day.

PHOENIX (AZFamily) — It’s a First Alert Weather Day as a strong storm system makes its way through Arizona. Expect rain, snow, thunderstorm potential and cooler temperatures to end the work week.

PARKS, Ariz. (AP) — A winter storm dumped heavy snow across northern Arizona on Friday, playing a major factor in a more than 15-mile backup on a major interstate. Semi-trucks and other vehicles were stalled on Interstate 40 westbound between Flagstaff and Williams late Friday as the sun set. The standstill dragged on for hours.

Northern Arizona experienced high levels of snowfall over the weekend causing multiple road way closures and detoured traffic.