Pacific Storm Brings Multiple Impacts to the West;Severe Weather Expected in the Central U.S.

A strong storm is expected to produce heavy rainfall in northern and central California that could lead to significant and life-threatening flash floods and mudslides, particularly over burn scar areas, and periods of heavy snow and gusty winds from the Cascades and Sierra into the Intermountain West through Monday. Severe thunderstorms and heavy rainfall expected in the Mid-Mississippi Valley.
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Last Update: 241 PM PDT Sat Oct 23 2021

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Portland, OR Local Forecast Office

38NM W Cannon Beach OR

Marine Zone Forecast


...STORM WARNING IN EFFECT FROM LATE TONIGHT 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.

Tonight
SE wind 30 to 35 kt with gusts to 45 kt. Combined seas 16 ft with a dominant period of 13 seconds. Rain.
Sun
S wind 30 to 35 kt with gusts to 45 kt. Combined seas 16 ft with a dominant period of 17 seconds, building to 19 ft with a dominant period of 17 seconds in the afternoon. Showers and a chance of tstms. Waterspouts possible.
Sun Night
S wind 35 to 40 kt with gusts to 50 kt. Combined seas 31 ft with a dominant period of 16 seconds. Showers and a chance of tstms. Waterspouts possible.
Mon
SW wind 25 to 30 kt. Gusts to 40 kt, becoming 35 kt in the afternoon. Combined seas 26 ft with a dominant period of 15 seconds. Showers and a slight chance of tstms.
Mon Night
SW wind 25 to 30 kt with gusts to 35 kt, easing to 20 to 25 kt with gusts to 30 kt after midnight. Combined seas 25 ft with a dominant period of 15 seconds in the evening. Showers and a slight chance of tstms.
Tue
SW wind 20 to 25 kt with gusts to 30 kt. Wind waves 7 ft. W swell 18 ft. Rain.
Tue Night
SW wind 15 to 20 kt with gusts to 25 kt. Wind waves 5 ft. W swell 12 ft. Chance of rain.
Wed
S wind 15 to 20 kt. Wind waves 4 ft. W swell 15 ft.
Thu
SW wind 10 to 15 kt. Wind waves 4 ft. W swell 12 ft.
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ABOUT THIS FORECAST

Last Update: 241 PM PDT Sat Oct 23 2021
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