A blowing dust advisory is in place until 6 p.m. in metro Phoenix, according to the National Weather Service.
The clouds are large and the sky is dark in the west Valley. The rain is moving into Phoenix and will be here within the next couple of hours.
In the High Country, the NWS is predicting the heaviest precipitation for Coconino Yavapai counties will be from 8 p.m. Tuesday to 3 a.m. Wednesday. Precipitation will hit Gila, Navajo and Apache counties a little later at 10 p.m. Tuesday to 5 a.m. Wednesday.
Rain and snow are making their way to Arizona and are expected to hit as early as Tuesday afternoon.
Phoenix could see around 0.25 inches of rain. The best time for rain in the Valley, according to the National Weather Service, is from 5 p.m. to 10 p.m. Tuesday.
The NWS in Flagstaff says a cold front will spread snow showers across the region.
Flagstaff could see 3 - 5 inches of snow while Williams could see 4 - 6 inches. A winter weather advisory is in effect for much of the higher terrain areas of northern Arizona from the Grand Canyon to Flagstaff and the White Mountains.
Difficult driving conditions will accompany both the rain in the Valley as well as the gusty winds and snow in the High Country.
The storm system is expected to last through Wednesday morning.