SEATTLE -- Winter storm and heavy snow advisories were in effect up and down Washington's Cascade range while residents in many lowland areas were cleaning up the muck and mess left by receding floodwaters Friday.

A storm dropped 6 inches of snow by midday Friday and forecasters warned of a lot more to come.

"Expect up to a foot of new snow in the passes for Friday and early Saturday, with more snow at times on Saturday and renewed heavy snow on Sunday," said KIRO 7 Eyewitness News Chief Meteorologist Andy Wappler.

Wappler: 'Snow Machine' At Work In Passes

With flood damage closing several other highways across Cascade passes, the Transportation Department put a big effort into clearing snow from I-90 across Snoqualmie Pass.

WSDOT spokeswoman Jamie Holter said it has already begun traffic management on eastbound traffic near North Bend. That spaces out cars and lets snow plows do their work.

Crystal Mountain ski resort near Mount Rainier announced plans to open on Wednesday.

Cars slid on Interstate 90, KIRO 7 Eyewitness News reported, after morning slush turned to compact snow and ice.

Slideshow: Cars Slip, Slide At Pass

Forecasters said there was little chance of renewed flooding, largely because so much of the precipitation is expected to fall -- and, for the time being, remain -- in the mountains as snow.

Four rivers remained above flood stage Friday: the Cowlitz River at Mayfield Dam near Mossyrock, the Cedar River at Renton, the Chehalis River near Porter and the White River near Buckley. Most were expected to be back within their banks by Saturday.

Twenty-four counties asked residents to report flood-related damages in advance of visits by state and federal authorities next week.

"The water has receded. There may be some areas that still have some standing water," said Lewis County sheriff's Deputy Stacy Brown. "But mostly, now we're into the cleanup and damage assessment process. We're still working on getting residents to report their losses."

South of Mount Rainier in Randle and Packwood, where dozens of homes were damaged and three were washed away entirely by the Cowlitz River, volunteers were handing out drinking water, cleaning supplies, clothes, food and other items to hard-hit residents. Farther south, residents in Vader and Toutle were told to boil drinking water as a precaution after the storm.

Six crews of state and federal officials, representing the Small Business Administration and the Federal Emergency Management Agency, will conduct assessments in all 24 counties beginning Wednesday, said Rob Harper of the state Emergency Management Division.

Damages could include structural damage from floodwaters or mudslides, but also economic damage to businesses because roads were closed or traffic was diverted, Harper said.

"We can't do a house-by-house kind of thing, but we're going to first look at damage to individual homeowners and businesses. That's the priority right now," he said.

The storms that began last weekend and ended Tuesday were blamed for at least two deaths, men who drove pickup trucks into floodwaters from the Cowlitz River in eastern Lewis County. Scores of homes were damaged, and washed-out roads, campgrounds, power and sewer systems forced Mount Rainier National Park officials to close the park to visitors for the first time in 26 years.

Six shelters remained open across Western Washington. About 40 people sought shelter Thursday night.

Meanwhile, search-and-rescue crews completed their search for hunters between Mount Rainier and Mount St. Helens Thursday. An estimated 1,000 hunters were believed to be in the woods, unaware that roads out of the hills were blocked by mudslides or washed away at lower elevations.

"Most of the people we contacted wanted to stay once they realized they could make it out when the mudslides are cleared off the roadway," Brown said.