Cape Shoalwater WA to Cape Lookout OR between 60 and 150 NM Offshore Forecast
| Tonight...Nw Winds 15 To 25 Kt, Becoming W To Nw. Seas 8 To 11 Ft. Isolated Showers. |
| Wed...Nw Winds 15 To 25 Kt, Becoming W 10 To 20 Kt. Seas 9 To 12 Ft. |
| Wed Night...W Winds 10 To 20 Kt, Becoming 10 To 15 Kt. Seas 8 To 11 Ft. |
| Thu...W To Sw Winds 5 To 15 Kt, Becoming 5 To 10 Kt. Seas 6 To 9 Ft. Scattered Showers. |
| Thu Night...Sw Winds Less Than 10 Kt, Becoming S To Sw. Seas 5 To 7 Ft. |
| Fri...W To Sw Winds 5 To 15 Kt. Seas 4 To 6 Ft. |
| Fri Night...Sw Winds 5 To 15 Kt, Becoming S To Sw 5 To 10 Kt. Seas 4 To 6 Ft. |
| Sat...S Winds 5 To 10 Kt. Seas 4 To 6 Ft. |
| Sat Night...Variable Winds Less Than 5 Kt. Seas 4 To 5 Ft. |
| Sun...S Winds 5 To 10 Kt, Increasing To 10 To 15 Kt. Seas 5 To 7 Ft. |
| Sun Night...S To Se Winds 5 To 15 Kt. Seas 6 To 9 Ft. |
| Area Forecast Discussion National Weather Service Portland OR 1125am PDT Tuesday Oct 27 2026 .SHORT TERM...Today through Wednesday Night...While the low that brought the region widespread rainfall has now moved well east of the Cascades this morning. Scattered to numerous rain showers remain in the forecast through at least Wednesday night as an upper level shortwave trough is slowly pushed through the region. While CAMS are suggesting at a brief reduction in shower coverage through the afternoon, most places will still see some shower activity. Observed 48-hour rainfall totals through early Tuesday morning generally show 0.75-1.30 inches across the CWA. Additional rainfall of 0.15-0.75 inches is most likely through Tuesday, with up to 1 inch in favored terrain. While Wednesday is looking to be relatively drier than the past 48 hours, showers remain in the forecast with additional precipitation amounts of 0.10-0.50 inches with up to 0.75 inches in favored terrain. In addition to the precipitation, 850 mb temperatures will continue to fall towards 0C to -1C through Wednesday night. This will result in snow levels around 5000 ft today continuing to fall towards 4000-4500 ft by Wednesday morning, allowing for light snow accumulations at pass level. Chances for 1 inch of snow at Santiam and Willamette Passes through tonight remain 70-80%, with only 10% chance at passes near Mt. Hood. As for Wednesday, chances for 1 inch of snow at Santiam and Willamette Passes are around 70-85%, with a 30-40% chance at passes near Mt. Hood. Seasonable temperatures continue across the region with afternoon highs in the 50s and early morning lows in the upper 30s to mid 40s through the middle of the week. /42 Those planning travel through the Cascades should prepare for winter driving conditions. Long Term Thursday through Monday...Another, broader closed upper low and its associated surface low will drop south from the Gulf of Alaska over Vancouver Island and into the Pacific Northwest Wednesday night into Thursday. This will bring another round of precipitation to the region through Friday. 850 mb temperatures will continue to slowly fall towards -1C to -2C thus bringing snow levels further down towards 3000-3500 ft by Thursday. While cooler temperatures remain in the forecast, Quantitative Precipitation Forecast has decreased sharply with the Thursday system. Currently, the ensembles are supporting a 40-60% chance for an additional inch of snow for the Cascade passes. For lower elevations, another 0.10-0.25 inches of rain is most likely across the CWA. From Friday through the weekend, WPC 500 mb clusters support a broad low remaining offshore of the Pac NW, while weak ridging looks to develop over the Great Basin. This looks to bring some drier air into the region, which is cutting the overall Quantitative Precipitation Forecast for the latter part of this week and into the weekend. However, 15-30% Probability of Precipitation remain in the forecast. While a drying and clearing trend is expected for the end of the week and weekend, there continues to be a slight chance for lingering rain showers Friday and Saturday. So, for all those Halloween trick-or- treaters just be aware that some very light rain could impact any festivities. Given the clearing trend along with the influx of cooler temperatures expect overnight lows in the upper 20s to mid 30s most likely for most inland valleys through the weekend and into early next week. /42 Marine A surface low pressure system will move through all waters today bringing elevated winds with gusts approaching 25-30 kts and seas building towards 7-10 ft at 8-10 seconds. As such, have issued a series of Small Craft Advisories for all waters and the Columbia River Bar through at early Wednesday morning. Conditions will slowly subside after Wednesday with gusts below 15 kt and seas subsiding towards 4-6 ft at 10-12 seconds through the weekend. Looking towards the start of next week, another low pressure system from the Gulf of Alaska looks to bring building seas and winds that could result in Small Craft conditions for the start of next week. /42 NOAA Portland OR Office: Watches - Warnings - Advisories OR...None. WA...None. PZ...Small Craft Advisory until 11am PDT Wednesday for PZZ210-251- 252. Small Craft Advisory until 8am PDT Wednesday for PZZ253-273. Small Craft Advisory until 5pm PDT Wednesday for PZZ271-272. |
Portland OR Radar
Northwest Radar