Cape Shoalwater WA to Cape Lookout OR between 60 and 150 NM Offshore Forecast
| Tonight...W Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt. Seas 7 To 9 Ft. Chance Of Rain. |
| Sun...W Winds 10 To 15 Kt. Seas 8 To 10 Ft. Showers Likely. |
| Sun Night...W Winds 10 To 15 Kt, Increasing To 15 To 25 Kt. Seas 8 To 9 Ft. Showers. |
| Mon...W To Nw Winds 15 To 25 Kt, Becoming W 10 To 15 Kt. Seas 8 To 10 Ft. Showers. |
| Mon Night...W To Sw Winds 15 To 25 Kt. Seas 8 To 13 Ft. |
| Tue...W To Nw Winds 15 To 25 Kt, Becoming N 10 To 20 Kt. Seas 9 To 14 Ft. |
| Tue Night...Nw Winds 5 To 15 Kt. Seas 6 To 10 Ft. |
| Wed...Variable Winds Less Than 10 Kt, Becoming S 15 To 25 Kt. Seas 4 To 6 Ft. |
| Wed Night...S Winds 15 To 25 Kt, Becoming W 15 To 20 Kt. Seas 4 To 8 Ft. |
| Thu...W Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt. Seas 6 To 7 Ft. |
| Thu Night...W Winds 5 To 10 Kt, Becoming N To Nw. Seas 4 To 5 Ft. |
| Area Forecast Discussion National Weather Service Portland OR 252pm PDT Sat April 27 2024 Synopsis Front continues to bring rain this afternoon, transitioning into showery conditions that will continue through early next week. Wednesday and Thursday may have a break from showers, but expect a return of precipitation into next weekend. .SHORT TERM...(Today through Tuesday)...Fast moving front continues to move eastward, reaching the Cascades in the late afternoon. Rain will transition to showers behind the front, resulting in showers throughout the region by evening. Not much rain expected from this front today, with 0.25 to 0.50 inch (30-50% chance to exceed 0.5 inch) expected in the Coast Range and Cascades, northward of Newport and Mt Jefferson (Oregon Highway 20). Expect less rain across the coast and inland valleys, around 0.10 to 0.25 inch. Otherwise, similar 24 hour rainfall amounts for Monday and Tuesday, with Monday reaching farther south in the Coast Range and Cascades unlike today and Tuesday. Cooler air aloft will push inland tonight as the front passes, maintaining showers. This cooler air will steepen lapse rates and bring some instability through Tuesday for southwest Washington and northwest Oregon, as well as along the coast. As a result, any cloud breaks during the afternoon could provide enough warming to produce an isolated thunderstorm, most notably Monday through Tuesday, with less chances Sunday. Will keep a slight chance of isolated thunderstorms along the coast and for inland areas north of a Lincoln City to Salem line through Tuesday. Sunday night, another fast moving system will move southeastward into the region, bringing steady rain for a brief period before transitioning to showers. As this system passes by and brings cold air, snow levels of 4000-4500 feet will drop to 2000-2500 feet early Monday morning. As a result, 4-8 inches of 12 hour snowfall across the Cascades is expected through Monday morning. With chances around 50-60% of 12 hourly snowfall exceeding 6 inches Monday morning, as well as a late season drop of snow levels, a Winter Weather Advisory has been issued from 11PM Sunday to 11AM Monday for the Cascades. -JH Long Term (Wednesday through Friday)...Overall confidence is low to moderate as the pattern stays rather progressive into late next week. Deterministic and ensemble guidance continue to struggle to resolve the longitudinal placement of ridge/trough features going forward. Wednesday guidance has continued to trend a little drier nudging a larger scale upper-level low further north while a transient ridge glides over the region. Out of all the ensemble solutions available, this scenario is present in roughly 60% of them in addition to the latest deterministic ECMWF (European Centre for Medium-Range Weather Forecasts) and GFS. Thursday and beyond, model uncertainty becomes truly significant with nearly a 50/50 split between maintaining a ridge feature overhead or bringing a potent trough into the region by Thursday and becoming most defined Friday. Current confidence in the forecast by Thursday is low. -JH/Schuldt Marine Elevated conditions persist through today, resulting in steep and choppy seas along with gusty southwesterly winds with gusts up to 30 kt. Therefore, have adjusted the timing of the current Small Craft Advisories to reflect this as conditions will start to subside by Saturday afternoon as winds become more westerly. However, this will be somewhat short lived as the next system is expected to start impacting the waters Sunday and will bring a return to Small Craft winds and seas that are expected to persist across as waters through the start of the upcoming week. /42 NOAA Portland OR Office: Watches - Warnings - Advisories OR...Winter Weather Advisory from 11pm Sunday to 11am PDT Monday for ORZ126>128. WA...Winter Weather Advisory from 11pm Sunday to 11am PDT Monday for WAZ211. PZ...Small Craft Advisory until 8pm PDT this evening for PZZ210- 251>253. Small Craft Advisory until 5pm PDT this afternoon for PZZ271>273. |
Portland OR Radar
Northwest Radar