Cape Lookout to Florence OR between 60 and 150 NM Offshore Forecast
| Tonight...N Winds 10 To 20 Kt, Becoming 10 To 15 Kt. Seas 5 To 6 Ft. |
| Thu...N Winds 10 To 15 Kt. Seas 5 To 6 Ft. |
| Thu Night...N To Nw Winds 5 To 15 Kt. Seas 5 To 6 Ft. |
| Fri...N To Ne Winds 5 To 15 Kt. Seas 5 To 6 Ft. |
| Fri Night...N Winds 15 To 20 Kt, Becoming Ne 10 To 15 Kt. Seas 6 To 7 Ft. |
| Sat...Ne Winds 10 To 15 Kt. Seas 5 To 7 Ft. |
| Sat Night...Ne Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt. Seas 5 To 6 Ft. |
| Sun...Ne Winds Less Than 10 Kt. Seas 4 To 5 Ft. |
| Sun Night...Variable Winds Less Than 5 Kt. Seas 4 To 5 Ft. |
| Mon...S To Sw Winds 5 To 10 Kt. Seas 4 To 5 Ft. |
| Mon Night...S Winds Less Than 10 Kt. Seas 4 To 5 Ft. |
| Area Forecast Discussion National Weather Service Portland OR 148pm PST Wednesday Jan 21 2026 Synopsis Dry weather is expected to continue through most of the weekend as high pressure stubbornly holds overhead. Gusty winds persist through the Columbia Gorge. Expect cold overnight lows in the in the low 30s to mid 20s tonight and likely tomorrow night. Clear skies, and light winds away from the Columbia River Gorge will result in frost and/or freezing fog formation for a decent swath of the interior lowland valleys and coast range Valleys. Near/below freezing temperatures in combination with any fog/frost may lead to locally slick road conditions. Chances for precipitation return towards the end of the week as well as by the middle of next week, but details on the exact timing and impacts remain rather uncertain at this time. Now through Tuesday...Dry weather is here to stay through much of the weekend and into the start of next week as ensemble guidance (GFS, Euro, and Canadian) are in good agreement that the ridge of high pressure will remain anchored over the Eastern Pacific/Pac NW. However, ensembles indicate that an incoming, shortwave trough will result in heigheights slowly lowering over the PacNW through the latter part of the week. This will allow a break down of the strong pressure gradients over the Cascades for the latter part of this week. Gusty offshore/east winds persist through the western Columbia River Gorge and into the eastern Portland metro with peak gusts up to 40 mph through the eastern Portland metro, including Troutdale, and up to 65 mph for windy locations east of Troutdale. As the pressure gradient slowly weakens over the next 48-72 hours, the extent and strength of gusty offshore winds through the Gorge will follow suit. However, wind prone areas near the Gorge will continue to see breezy winds into the weekend. Even with a weak shortwave moving in from the north, expect mostly sunny skies for the region through the end of the week. Under mostly clear skies, overnight temperatures will continue to be on the cold side with morning low temperatures near to below freezing across most of the region, for those areas outside of the influence of offshore winds through the Gorge. Clearing skies tonight will result in overnight lows as well as apparent temperatures (often called wind chill or "feels like" temperatures) dropping into the low 30s to mid 20s for lowland areas. For higher elevations, the temperature inversion that has been keeping higher elevations 5 to 10 degrees warmer will persist. So, have issued a Cold Weather Advisory for the majority of lowland areas within the Willamette Valley to include: North and Central Coast Range Valleys of Oregon, Lower Columbia River and Cowlitz River Valleys, Clackamas County Cascade Foothills, North Clark County Lowlands, Inner Vancouver Metro, Central and Southern Willamette Valley, Tualatin Valley, North and Central Coast Range Mountains of Oregon, Portland Metro Hills, and South Washington Cascade Foothills. These areas are expected to experience at least 4 hours or more of apparent temperatures at or below 25 degrees. Given the minimal changes expected for Friday night/Saturday morning, there is a moderate to high probability (45-70%) for another Cold Weather Advisory to be issued. These cold, overnight conditions are also expected to persist through Saturday night/Sunday morning. With the cold temperatures, freezing fog or frost concerns continue in the southern Willamette Valley, northern Cowlitz county valleys, and the Upper Hood River Valley each overnight through morning hours into the weekend. Any freezing fog or frost that develops could lead to locally slick road or sidewalk conditions. Additionally, stagnant air will be a continued concern under the subsidence inversion, leading to air quality concerns into Friday. Mixing heigheights will remain low and transport winds will be weak through the week. Therefore, an Air Stagnation Advisory is in effect through Friday after which point there's moderate confidence in improvement. The Portland Metro area from the West Hills eastward were not included in this advisory due to stronger winds from the Gorge maintaining a more mixed atmosphere. Looking at early next week, ensemble guidance continues to push back the return of precipitation to NW Oregon and SW Washington. Currently, ensemble members are in good agreement that a weak low pressure system will move through the NE Pacific Thursday/Friday and will help to provide a momentary break from the current conditions. However, guidance continues to weaken this low as it approaches the region resulting in PoPs of 15-30% along the OR and WA coasts. There is good ensemble agreement that ridging returns by Friday and Saturday and will bring much colder, overnight temperatures across the CWA (County Warning Area) along with a return of onshore flow. As we move into the start of next week/middle of next week, ensembles are now showing a signal for a more significant pattern change. Models are showing a broad area of low pressure, sliding into the region from the NE Pacific and that could bring relatively warm and moist air into the Pac NW. Still, it should be noted, that model runs keep pushing the pattern change further and further into the future. Nevertheless, we will continue to diligently monitor and update the forecast as needed. /42/03 Marine Rather benign conditions continue across the coastal waters. High pressure builds slightly offshore and persists over the waters through the end of the week, while the high pressure inland weakens somewhat. This will allow for the offshore winds to diminish as the northerly winds become more dominant by Thursday. Offshore winds return Friday as the thermal trough along the coast expands northward, and higher pressure rebuilds inland through the weekend. Generally, winds are expected to remain 15 kt or less. Seas are expected to persist at around 4 to 6 ft with wave periods varying between 11-15 seconds through the weekend. Not much change to the overall sea state into early next week. /DH NOAA Portland OR Office: Watches - Warnings - Advisories OR...Air Stagnation Advisory until noon PST Friday for ORZ104-105-108- 109-114>118-123. Cold Weather Advisory from midnight tonight to 10am PST Thursday for ORZ104>110-113>118-123. WA...Air Stagnation Advisory until noon PST Friday for WAZ204>206. Cold Weather Advisory from midnight tonight to 10am PST Thursday for WAZ204>206-208. PZ...None. |
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