"The system itself and the origin, it's more of a continental air mass, if there is some surprise precipitation that comes with it, it's going to be added moisture", Bollenbacher said.
A winter storm likely will bring snow to the Treasure Valley on Friday night and is expected to drop snow all weekend, according to the National Weather Service.
Snow was tapering off in western Washington by mid-morning Saturday, but enjoy the quick break before another system moves in.
In Yosemite National Park, as many as 50 housing structures near Half Dome Village were damaged by trees toppled during a snowstorm earlier this week, displacing more than 160 employees who provide food, lodging and other services for visitors.
For the second time this week, the Pacific Northwest is bracing for snow - and this time will see as many as 8 inches in the Seattle area, forecasters said Friday.
More snowfall is expected Saturday, and officials are prepared.
Elsewhere, more than 148,000 customers were without electricity in MI following days of freezing rain. A 59-year-old man died Thursday from exposure at a Seattle light rail station.
A slew of outbound and incoming flights were canceled at Seattle-Tacoma International Airport, the Port of Seattle said.
Additional shelter space opened by city and county officials was filling up.
Climate scientist Cliff Mass warns of a storm bigger than anything we've seen this week for Tuesday, labeling it "the Big Kahuna of snow".
"The stronger portions of the storm hits Saturday afternoon through Sunday evening, with a winter storm watch up for Reno and the Truckee Meadows where 1-6" of snow is possible through Sunday evening.
Weather.us meteorologist Ryan Maue said: "This February in Seattle is going to be remembered for brutal winter weather for many folks not used to it".
Sang said she had never seen the store so crowded. "I think that Portlanders, majority are city people and they come from a lot of different places, so they're not so used to it. If you don't have to go out, don't go out'".