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Flood, damaging wind threat to mount as storms pummel northwestern US

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The threat for flooding and wind damage will remain high across the northwestern United States as powerful storms barrel onshore through early next week.

The first storm that moved ashore from Thursday to Friday blasted the region with heavy rain and high winds.

Gusts over 90 mph were reported along the Washington and Oregon coastlines. Reports of toppled trees and power lines were widespread across the region.

The National Weather Service in Portland, Oregon, confirmed two tornadoes along the Oregon coast early on Friday. One was reported in the town of Manzanita, while the other touched down in the community of Oceanside.

A waterspout moved onshore near Manzanita, Oregon, Friday morning and caused some damage to the town. (Photo/Twitter/@molfamily via Storyful)

Reports of property and tree damage, power outages and flooding will only mount into the new week.

The next storm, packing even stronger winds, will impact portions of British Columbia, Washington, Oregon and northern California through Sunday.

This storm will contain the remnant circulation of once-Super Typhoon Songda, which curved away from Japan earlier this week.

Impacts from this storm will be similar to that of a hurricane, according to AccuWeather Senior Meteorologist Alex Sosnowski.

Gusts from 75 to 110 mph will occur in some coastal areas, with gusts ranging from 40 to 70 mph farther inland.

Trees that have already been compromised by the first storm could topple easily from the howling winds.

Rainfall up to half a foot will struggle to soak into the saturated soil. Even higher rainfall amounts are possible near the coast.

"Flooding will certainly be a concern after much of this same region got inundated with several inches of rain to end the workweek," AccuWeather Senior Meteorologist Dan Pydynowski stated.

Motorists should prepare for slow travel and possible road closures. Never attempt to drive through a flooded roadway as the water may be higher than it appears and the roadway underneath could be compromised.

In addition to the hazards from rain and wind, a few waterspouts could be spawned over the rough seas. Some may move onshore and cause additional damage to some communities.

Gusty winds, but not as much rain, will reach portions of Idaho, Montana, Nevada, Utah and Wyoming. The winds could fan some of the wildfires that are raging across the region.

According to a local ABC affiliate, wind-driven wildfires destroyed 22 homes near Carson City, Nevada, and forced hundreds to evacuate at Lake Tahoe on Friday.

Beyond this weekend, one or two more storms are expected to impact the region from Monday through Tuesday.

While these storms will overall be weaker, any additional unsettled weather could cause new flooding problems and hinder clean-up efforts.

"Cumulative rainfall through Tuesday of next week will top 12 inches in some coastal areas with the potential for 18 inches in a few locations from northwestern California to the Olympic Peninsula of Washington," Sosnowski said.

Beyond Tuesday, the storm track is expected to shift farther north. This means that most of the rain and wind will impact British Columbia and Washington, while bypassing Oregon and northern California.