Washington is prone to intense spells of fall rainfall, but these storms have been exceptional, and more rain is on the way this weekend.

The moisture from this storm system will help two fast-moving winter storms spread snow across the eastern U.S., with another atmospheric river on its way.

National Guard troops went door-to-door early Friday to evacuate a farming city north of Seattle as severe flooding throughout Western Washington stranded families on rooftops, washed over bridges and ripped homes from their foundations.

Days of heavy rain due to an atmospheric river that hit Washington state is culminating in the threat of record-breaking deadly flooding in some areas. "This situation is extremely serious," said Washington's Democratic Governor Bob Ferguson on Wednesday. "The next few days are critical."

Some rivers may break records. Already, overnight into Tuesday, the Naselle River near Naselle, Washington, has gone from its normal 5 foot depth to nearly 20 feet deep, growing by 10 feet in 12 hours and coming within less than 1 foot of the historical record.

The atmospheric river that brought heavy rain to the Portland area this week has shifted northward, and most of northwest Oregon should now stay mostly dry through Thursday. Some isolated to scattered showers are expected, and south-southwesterly winds gusting up to 20-30 mph could stick around through Wednesday evening.

A strong atmospheric river continues to slam the Pacific Northwest. Over a foot of rain has been reported across portions of Washington as rounds of rain have pummeled the state. Flood Watches continue across northwest Washington,