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Fire hose of moisture to douse northwestern US through midweek

AccuWeather logo AccuWeather 4 days ago Faith Eherts
Fire hose of moisture to douse northwestern US through midweek © via accuweather.com Fire hose of moisture to douse northwestern US through midweek

(Photo by accuweather.com)

Coastal areas in the Pacific Northwest will hardly have time to clean up Monday's storm damage before another round of gusty, drenching rain and colder air plows into the coast.

The most recent storm to slam the region produced wind gusts in excess of 70 mph, inches of rainfall and even a few waterspouts on Monday.

"Wind gusts as high as 50-55 mph will batter the coast through midweek, causing some beach erosion and angry, hazardous seas for mariners," said AccuWeather Meteorologist Kyle Elliott.

Damaging winds are expected to focus on coastal areas, with the highest gusts occurring in areas from Vancouver through southwestern Oregon beginning on Tuesday night

Residents will need to ensure that any loose items are secured or brought indoors, and that generators or other forms of backup power are ready to go.

The span of the coast from Vancouver to the Sacramento Valley can expect heavy rain to move in on Wednesday as winds become less severe.

"A fire hose of moisture will be aimed at the Pacific Northwest through midweek, especially along and west of the Cascades in Washington and northern Oregon," Elliott said. "Portions of the Olympic Peninsula may see as much as 6 inches of rain through midweek."

Any existing flooding will be exacerbated as inches of rain fall over already saturated ground.

Downed trees, power lines and flooding will threaten to block or wash out roads, especially in heavily wooded or mountainous areas and on secondary roads.

Travel should be done cautiously, if at all, and motorists should never try to traverse a flooded roadway.

The cold air accompanying this storm will penetrate farther inland and southward than its predecessors and will bring "over a foot of snow in the Olympic Mountains and highest elevations of the Washington and Oregon Cascades," Elliott said.

By the end of the week, rounds of heavy snow pummeling the Sierras, Bitterroots and northern Rockies could drop over a foot of snow in those areas as well.

"Portions of I-80 near Snoqualmie Pass are in line for over a half foot of snow, which could make travel slippery and difficult for motorists," Elliott warned.

A break in the stormy pattern will occur after this system moves out late on Thursday, with relatively dry and calmer weather expected to prevail through at least the first half of the weekend.

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