Ready the snow chains and the skis, as up to two feet of powder is expected to fall this weekend in parts of the Sierra. A forecaster with the National Weather Service told the Chronicle that most of the precipitation will come tonight, but that the deluge will continue through Saturday evening.

Spots above 3,500 feet are going see the highest accumulation, topping out around two feet, whereas the 2,500 to 1,500-foot range is going to see snowfall but not much of it sticking around. Still, officials warn that snow tires and chains are going to be required on some parts of Interstate 80.

According to Caltrans, "chains are required on all vehicles except 4-wheel-drive vehicles with snow tires on all 4 wheels from 1 [mile] east of Baxter (Placer Co) to 7 [miles] East of Truckee (Nevada Co)."

To top it all off, forecaster Mike Kochasic told the Chronicle that wind in the area could hit 25 to 35 miles per hour.

At the time of this writing, the Mammoth Mountain summit cam shows heavy snow and near white-out conditions. Mammoth Mountain is located in the Eastern Sierra, meaning anyone looking to have Christmas on the slopes is going to be very happy — assuming they can safely get to the mountain first.

Related: San Francisco Might Actually (Maybe) Get Snow On Christmas Eve