The Oregonian/OregonLive

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Kicking off what will be a mostly wet and somewhat cold week, Monday's rain will last through about mid morning before tapering off to just showers and then some occasional clearing by evening. Highs on Monday should reach 50 degrees.



Along with our valley rain, another 2-5 inches of snow are expected for the southern Washington and northern Oregon Cascades.

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Early #pdxtraffic commuters: Looks like a wet one for the PDX Metro. Take it slow out there... #orwx #wawx pic.twitter.com/nMfhkSo79e — NWS Portland (@NWSPortland) January 22, 2018

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The Oregonian/OregonLive

A real soaker arrives for Tuesday. Along with the daunting 100 percent chance of precipitation Portland will experience a “prolonged period” of steady rain from Tuesday into Wednesday according to the National Weather Service. Highs on Tuesday will be 48 degrees. Rainfall amounts in the valleys should reach up to 1.5 inches. Higher terrain could see 2-4 inches of rainfall.

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The Oregonian/OregonLive

Tuesday’s system also offers up high winds on the coast and plenty of mountain snow in the Cascades. The front is expected to stall over the Pacific Northwest Tuesday into Wednesday dumping feet of snow on the Cascades. Snow levels will likely rise above the Cascade passes ahead of the front on Tuesday, but the higher ski resort elevations should see mainly snow from the Santiam Pass northward.

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The Oregonian/OregonLive

Areas in the Hood River valley and around Mount Adams could see snow levels around 1,000 feet Tuesday morning. This could start Tuesday off as mixed precipitation and some snow showers until the snow levels jump in that area to 3,000 feet by the afternoon. We’ll keep an eye on that.

The rain from Tuesday extends into Wednesday and high temperatures will remain in the upper 40s. Current long-range forecasts continue the valley rain and mountain snow into Thursday and Friday.