Powerhouse Storm Set for West; Severe Weather Threat the Next Several Days

The most significant of the recent Pacific storms to reach the West Coast will arrive this weekend, mainly Sunday into Monday. A number of hazards are expected, especially the heavy rain threat on Sunday across northern and central California that may result in flooding and debris flows near burn scars. These Pacific storms will produce severe weather the next several days east of the Rockies.
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Last Update: 1026 AM PDT Sat Oct 23 2021

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Portland, OR Local Forecast Office

6NM W Cannon Beach OR

Marine Zone Forecast


...STORM WARNING IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY MORNING...
Synopsis: A very strong low pressure area is forecast to develop over the NE Pac Saturday night and Sunday then move toward Vancouver Island Monday. Storm force wind gusts are expected at times late Saturday night through Monday morning. Wave heights around 30 feet are expected Sunday night and will remain above 20 feet through Monday night. Additionally, thunderstorms are expected Sunday afternoon and evening along with some potential of waterspouts. Another front crosses the waters Tuesday afternoon with much milder conditions on Wednesday, although seas still remain above 10 feet.

Rest Of Today
W 10 to 15 kt. Wind waves SW 4 ft at 5 seconds. W swell 11 ft at 12 seconds. Rain likely in the morning.
Tonight
S wind to 10 kt, becoming SE 15 to 20 kt with gusts to 25 kt after midnight. Wind waves SE 4 ft at 5 seconds. W swell 10 ft at 12 seconds.
Sun
S wind 25 to 35 kt with gusts to 50 kt. Combined seas 16 ft with a dominant period of 16 seconds. Showers. Chance of tstms. Waterspouts possible.
Sun Night
S wind 25 to 35 kt with gusts to 50 kt. Combined seas to 30 ft with a dominant period of 17 seconds. Showers and a chance of tstms. waterspouts possible.
Mon
S wind 25 to 30 kt with gusts to 35 kt, becoming SW 20 to 25 kt with gusts to 30 kt in the afternoon. Combined seas 25 ft with a dominant period of 15 seconds in the morning. Showers and a slight chance of tstms.
Mon Night
SW wind 20 to 25 kt with gusts to 30 kt, easing to 15 to 20 kt with gusts to 25 kt after midnight. Wind waves SW 6 ft at 6 seconds. W swell 19 ft at 14 seconds. Showers.
Tue
SW wind 20 to 25 kt. Wind waves 7 ft. W swell 16 ft.
Wed
S wind 10 to 15 kt. Wind waves 3 ft. W swell 14 ft.
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ABOUT THIS FORECAST

Last Update: 1026 AM PDT Sat Oct 23 2021
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