Cape Shoalwater WA to Cape Lookout OR between 150 and 250 NM Offshore Forecast
| Tonight...W To Sw Winds 5 To 15 Kt, Becoming Sw 10 To 20 Kt. Seas 7 To 11 Ft. |
| Fri...Sw Winds 10 To 20 Kt, Diminishing To 5 To 15 Kt. Seas 5 To 7 Ft. Chance Of Showers. |
| Fri Night...Sw Winds 5 To 10 Kt, Becoming Variable. Seas 5 To 6 Ft. |
| Sat...E To Ne Winds 5 To 15 Kt. Seas 5 To 6 Ft. |
| Sat Night...N To Ne Winds 10 To 20 Kt. Seas 5 To 7 Ft. |
| Sun...N To Ne Winds 10 To 20 Kt, Diminishing To 5 To 15 Kt. Seas 5 To 7 Ft. |
| Sun Night...N Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt. Seas 4 To 6 Ft. |
| Mon...N Winds 5 To 10 Kt, Increasing To 10 To 15 Kt. Seas 4 To 5 Ft. |
| Mon Night...N Winds 10 To 20 Kt. Seas 5 To 7 Ft. |
| Tue...N Winds 15 To 25 Kt. Seas 6 To 8 Ft. |
| Tue Night...N Winds 20 To 25 Kt. Seas 8 To 10 Ft. |
| Area Forecast Discussion National Weather Service Portland OR 226pm PDT Thu April 2 2026 Synopsis A few lingering post-frontal showers this afternoon will transition into high pressure through the next several days. Clearing skies tonight will allow for significant radiational cooling and light winds. Frost and below freezing temperatures expected throughout much of the area with a Frost Advisory and Freeze Warning in effect. Conditions warm through the weekend with climatologically abnormally warm temperatures expected through at least Monday. .SHORT TERM...Tonight through Friday...The frontal system that brought widespread rain to the region has exited the area, and behind it showers linger producing periods of heavy rain and mountain snow. Over the last 6 hours there has been little in the way of impacts from either the rain, wind gusts, or snow. High resolution models show showers persisting until at least the early evening but will gradually become more spaced out and lighter. Next on deck is the dropping of tempeatures tonight into Friday morning. Looking at the overall pattern, high pressure will begin to build this evening which will cause skies to begin to clear and become patchy. These clearing skies coinside with the overnight hours and will promote radiational cooling. Temepratures will drop considerably tonight with a greater than 70% chance of overnight minimum temperatures reaching 36 deg F or cooler. There is around a 60-80% chance of temperatures right around 32 deg F within the southern Willamette Valley, Cascade foothills, and the Upper Hood River Valley. The combination of these cold temperatures, lingering moisture from the recent rain, and light northerly winds will promote frost formation over much of the forecast area. From the Coast Range to the Cascade foothills, there is a 60-80% chance of widespread frost. Given the growing season, have maintained the Frost Advisory. In areas under the Freeze Warning, minimum temperatres are forecast to get below 32 deg F with the potential for frost as well. There is around 10% chance of temperatures as low as 27 deg F in the rural portions of the Willamette Valley and the Cascade Foothills. Within the Upper Hood River Valley, the areas furthest from the river will see those freezing temperatures. Be sure to protect your plants and homes by bringing inside or covering sensitive plants, and leaving a slight "drip" in water faucets to prevent them from freezing. One area that is being omited from the Frost Advisory though is the Greater Portland/Vancouver-Metro. This is two to a few reasons: 1) Cloud cover. The HREF and other higher resolution models show high probabilities for at least 50% cloud cover. The clouds would cause insulation from today's highs maintaining slightly warmer temperatures. 2) The Urban Heat Island effect does cause overnight temepratures to remain elevated. With that said, some areas within the outskirts like Oregon City, Tualatin, and Hillsboro may see areas of frost. By Friday morning, temepratures will rise and frost will dissipate. Near freezing temepratures are not expected through the remainder of the weekend. -27 Long Term Friday night through Wednesday...High pressure builds through the weekend which will drive the weather moving forward. Overall, very minimal concerns as we will transition into a much warmer and drier pattern. In fact, the Extreme Forecast Index (EFI) which highlight anamolous weather days is highlihgting Saturday through Wednesday afternoons as days with above normal temperatures for the region. The peak day though is Sunday afternoon but the current forecast has sub record breaking highs. However, for those wanting some vitamin D, it will be a great day to be outdoors. Synoptically, models are attempting to bring a low pressure system near the area on Wednesday from the Pacific. At this point, the probabilities for rain continue to decrease, likely due to the pervasive nature of the ridge that models struggle to combat. -27 Marine Westerly swells will continue to push seas into the 9 to 11 ft at 10 seconds range, then will gradually decrease below 10 ft into tonight. Steep seas have lasted slightly longer than previously expected, though in general they are easing in the outer waters. Northwesterly winds too have eased to 10 to 15 kt but cannot rule out a rogue gust to 20 kt with any passing showers. The Columbia River Bar (PZZ210) will maintain a Small Craft Advisory for elevated seas and a strong ebb cycle and seas of 7 ft. As the latter part of the week approaches, conditions start to ease as high pressure rebuilds and northerly winds return to the coastal waters. Expect seas around 5 to 6 ft Friday and through the weekend. With the ridge in place, winds will take on a summer like pattern on Saturday with another round of Small Craft advisory winds expected. Highest winds will be in the outer waters. High pressure remains through at least Tuesday. -27 NOAA Portland OR Office: Watches - Warnings - Advisories OR...Frost Advisory from 9pm this evening to 10am PDT Friday for ORZ104>110-113>115-119-123. Freeze Warning from 9pm this evening to 10am PDT Friday for ORZ116>118-121-124-125. Winter Weather Advisory until 5pm PDT this afternoon for ORZ126. Winter Storm Warning until 5pm PDT this afternoon for ORZ127- 128. WA...Frost Advisory from 9pm this evening to 10am PDT Friday for WAZ203>205-208. Winter Weather Advisory until 5pm PDT this afternoon for WAZ211. PZ...Small Craft Advisory until 8pm PDT this evening for PZZ210- 251>253-271>273. Small Craft Advisory from 3am to 9am PDT Friday for PZZ210. |
Portland OR Radar
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