- Associated Press - Thursday, December 22, 2016

FLAGSTAFF, Ariz. (AP) - The Latest on Arizona weather (all times local):

12:05 p.m.

A weather system that dropped heavy rain on parts of the Phoenix area has moved on but left some street flooding and full desert washes in its wake.

A stretch of the North Valley Parkway in north Phoenix was closed late Thursday morning due to flooding.

Photos posted on social media by other entities showed a car in standing water on a street underpass at Interstate 17 and a flooded unbridged crossing of a desert wash.

Crews had to clean up water on Interstate 10 in west Phoenix.

Some parts of the metro area got more than 1 inch of rain since Wednesday night.

9:20 a.m.

Much of northern Arizona is expected to have a white Christmas this weekend with a foot of snow or more expected in some places and lesser amounts elsewhere in the region as a weather system crosses the state.

The National Weather Service says snowfall Saturday through Sunday morning should total 8 to 12 inches in Flagstaff and 12 to 18 inches in Williams, located about 30 miles to the west.

Elsewhere in the region, forecasters expect there will be 4 to 6 inches of snow at the South Rim of the Grand Canyon, 3 to 4 inches at Prescott and 2 to 3 inches at Sedona.

The weather service says chances for showers will decrease on Sunday as the system moves east out of the area.

6:25 a.m.

The first of two storms that will cross Arizona by this weekend is dropping rain on much of the state and a little snow in the high country.

A flash flood watch was issued Thursday for southwestern Arizona, including the Yuma area, due to the potential for flooding and water ponding on roads.

Forecasters say showers will continue through Thursday before tapering off Friday, followed by the second weather system on Saturday, when more rain and snow are expected in northern Arizona.

Hazardous conditions are expected over the weekend in northern Arizona, with strong winds and snow levels dropping on Saturday to between 3,000 and 4,000 feet by early Sunday morning.

Showers from the second system will decrease on Sunday as it moves eastward.

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