Cape Shoalwater WA to Cascade Head OR out 10 NM Marine Forecast
| Rest Of Today...Sw Wind 5 Kt. Wind Waves Sw 1 Ft At 4 Seconds. Nw Swell 2 Ft At 9 Seconds. Widespread Dense Fog In The Morning. Areas Of Dense Fog In The Afternoon. |
| Tonight...Nw Wind To 5 Kt. Wind Waves Nw 1 Ft At 4 Seconds. Nw Swell 2 Ft At 9 Seconds. Areas Of Dense Fog In The Evening. Patchy Dense Fog After Midnight. |
| Wed...N Wind 5 To 10 Kt. Wind Waves N 1 Ft At 4 Seconds. Nw Swell 2 Ft At 9 Seconds. |
| Wed Night...N Wind 5 To 10 Kt. Wind Waves N 2 Ft At 4 Seconds. Nw Swell 3 Ft At 9 Seconds. |
| Thu...Ne Wind To 5 Kt, Backing To Nw In The Afternoon. Wind Waves Ne 1 Ft At 4 Seconds, Shifting To The Nw At 4 Seconds In The Afternoon. Nw Swell 3 Ft At 10 Seconds. |
| Thu Night...Nw Wind 5 Kt. Wind Waves N 1 Ft At 4 Seconds. Nw Swell 3 Ft At 10 Seconds. |
| Fri...Nw Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 4 Ft. |
| Sat...Nw Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 4 Ft. |
| Area Forecast Discussion ...UPDATED National Weather Service Portland OR Issued by National Weather Service Seattle WA 515am PST Monday Jan 5 2026 Synopsis Dry conditions today as weak ridging moves overhead. This break is short-lived as back-to-back systems arrive Tuesday to Wednesday. This will bring one to two feet of snow across the Cascades, including the passes. Those traveling through the Cascades should take extra precautions. Meanwhile, the lowlands will receive widespread rain. Guidance suggests that high pressure will return drier weather by the end of the week. .SHORT TERM...Now through Wednesday Night…Radar imagery as of early Monday morning depicts decreasing showers across northwest Oregon and southwest Washington as a weak low pressure system exits the region. Any lingering showers are mainly confined to the coast, Coast Range, and Cascades. Dry weather returns today with increasing cloud breaks as transient, weak ridging moves overhead. Cloud cover increases tonight as the next system approaches, though there may be enough clearing in the evening for some patchy fog development and low visibility impacts, especially for our typically foggy locations like the Tualatin Valley and the southern Willamette Valley. Tuesday to Wednesday, two robust, back-to-back weather systems will move in from the northwest. Snow levels will be around 2000-3500 feet, so the main impacts from these systems will be heavy snow across the Cascades, including our main passes such as Hwy 26 at Government Camp, Santiam Pass, and Willamette Pass. A Winter Storm Warning has been issued across the South Washington Cascades and the Northern and Central Cascades of Oregon from 4am Tuesday to 4pm Thursday, where snow accumulations of one to two feet are expected. The heaviest snow will fall Tuesday afternoon and evening (first system) as well as Wednesday afternoon and evening (second system), with lighter snow in-between. Chances for snow amounts exceeding 2 feet in a 48 hour period from 4am Tuesday to 4am Thursday are around 25-45%. If you plan to travel through the Cascades this week, make sure to check the latest weather forecast and refer to ODOT/WSDOT for travel restrictions. If you must travel, use extra caution and pack and emergency kit. For everywhere else below 2000 feet, Tuesday and Wednesday will be a soaker with widespread rain and minimal hydro concerns. Colder air aloft will also bring increased instability, especially along the coast. Therefore, there is a 15-20% chance for thunderstorms along the coast Tuesday afternoon and Wednesday afternoon. Any passing thunderstorms may bring lightning, heavy rain, erratic gusty winds, and/or small hail. -10 Long Term Thursday through Sunday…Rain transitions into post- frontal showers Thursday with lingering snow across the Cascades. Will note that there is a 10% chance that snow levels drop as low as 700-1000 feet on Thursday, especially over southwest Washington. Any heavy showers that occur may briefly bring snow levels down below 1000 feet, resulting in brief snow. Given the onshore flow and milder temperatures, any snow that falls will likely not result in impactful accumulations. Friday into the weekend drier weather appears to return as the majority of ensemble members (60-70%) suggest ridging beginning to build over the northeast Pacific with increasing 500 mb heigheights over the Pacific Northwest. Ensembles place the ridge axis just offshore of the U.S. West Coast on Friday, but by this weekend the axis shifts overhead of us. Will note that there is a 15-25% chance that we don`t stay dry due to ridge either not being amplified enough or the ridge axis being placed to the east of us. Some ensembles are showing precipitation riding the northwestern periphery of the ridge and bringing continued showery conditions to the Pacific Northwest. -10 Marine High pressure builds today, returning weak northerly winds and seas subsiding to 6-8 feet at 10-11 sec through this evening. Tonight, winds turn more southerly ahead of the next front. This strong front will move through on Tuesday, returning at least widespread small craft conditions and a 70-90% chance for occasional Gale force wind gusts of 34 kt or stronger. A Small Craft Advisory has been issued for the waters north of Cape Foulweather beginning 10pm tonight through 10am Tuesday. A Gale Watch has also been issued following this Small Craft Advisory from 10 AM-10pm Tuesday given the potential for Gale force wind gusts. There is still some uncertainty whether or not we’ll see widespread Gale force wind gusts to warrant a Gale Warning at this point. For the waters south of Cape Foulweather, the Small Craft Advisory begins 7am Tuesday and lasts through Tuesday evening as winds will not be as strong further south. Wednesday through the end of the week, a long period northwesterly swell will move in and return hazardous seas. Seas most likely peak between 17-19 feet Wednesday to Thursday. Guidance suggests a 25-50% chance for seas exceeding 20 feet for the waters beyond 20 NM, and a 10-20% chance for the waters out 20 NM including the Main Channel of the Columbia River Bar. -10 .BEACH HAZARDS...A long-period northwesterly swell will bring a high threat for sneaker waves Wednesday to Friday. During this time, waves may run further up the beach than normal. These waves can easily catch people off guard. Never turn your back to the ocean. Razor clammers should use extra caution. -10 NOAA Portland OR Office: Watches - Warnings - Advisories OR...Winter Storm Warning from 4am Tuesday to 4pm PST Thursday for ORZ126>128. WA...Winter Storm Warning from 4am Tuesday to 4pm PST Thursday for WAZ211. PZ...Small Craft Advisory from 3pm this afternoon to 9pm PST this evening for PZZ210. Small Craft Advisory from 10pm this evening to 10am PST Tuesday for PZZ210-251-252-271-272. Gale Watch from Tuesday morning through Tuesday evening for PZZ251-252-271-272. Small Craft Advisory from 7am to 10pm PST Tuesday for PZZ253- 273. |
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