Heavy Rain and Mountain Snow This Week Northwest To Rockies; Heavy Rain May Bring Flooding to Portions of the East Late Week

At least two storm systems will batter the Pacific Northwest into the northern Rockies this week with heavy rain and mountain snow. The first system may bring as much as two feet of snow to the northern Cascades through Wednesday. This first system will then move over the central US by late week and bring heavy to excessive rain to portions of the south and east Thursday into this weekend.
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Last Update: 330 AM PST Tue Dec 11 2018

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Portland, OR Local Forecast Office

17NM SSW Newport OR

Marine Zone Forecast

...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON...

Synopsis: Winds increase ahead of a cold front expected to cross the waters this afternoon. Gusty winds and building seas will remain behind the front through Wednesday. A 972 mb low will pass well northwest of the waters Thursday night bringing a strong cold front Friday. Seas are likely to frequently reach and exceed 20 feet Wednesday through Saturday.

Today
S wind 20 to 25 kt, rising to 25 to 30 kt. Gusts to 35 kt. Combined seas 9 ft with a dominant period of 14 seconds, building to 15 ft with a dominant period of 12 seconds. Rain.
Tonight
W wind 20 to 25 kt. Gusts to 30 kt. Combined seas 16 ft with a dominant period of 11 seconds. Rain in the evening. slight chance of tstms. Showers likely after midnight.
Wed
SW wind 5 to 10 kt with gusts to 15 kt, becoming S 10 to 15 kt with gusts to 20 kt in the afternoon. Wind waves SW 2 ft at 4 seconds. W swell 18 ft at 13 seconds.
Wed Night
S wind 20 to 25 kt. Wind waves S 6 ft at 6 seconds. W swell 18 ft at 15 seconds, subsiding to 14 ft at 15 seconds after midnight.
Thu
S wind 15 to 20 kt with gusts to 30 kt. Wind waves S 5 ft at 6 seconds. W swell 16 ft at 15 seconds.
Thu Night
S wind 20 to 25 kt with gusts to 30 kt. Combined seas 20 ft with a dominant period of 16 seconds. Rain likely.
Fri
SW wind 20 to 25 kt. Combined seas 21 ft.
Sat
S wind 20 to 25 kt. Wind waves 7 ft. NW swell 12 ft.
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ABOUT THIS FORECAST

Last Update: 330 AM PST Tue Dec 11 2018
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