Cascade Head to Florence, OR out 10 NM Marine Forecast
|Tonight...N Wind 15 To 20 Kt With Gusts To 25 Kt. Wind Waves N 3 Ft At 6 Seconds. Nw Swell 7 Ft At 11 Seconds.|
|Mon...N Wind 15 To 20 Kt, Rising To 20 To 25 Kt In The Afternoon. Wind Waves N 3 Ft At 6 Seconds. Nw Swell 6 Ft At 11 Seconds.|
|Mon Night...N Wind 20 To 25 Kt. Wind Waves N 4 Ft At 7 Seconds. W Swell 4 Ft At 11 Seconds.|
|Tue...N Wind 15 To 20 Kt, Rising To 20 To 25 Kt In The Afternoon. Wind Waves N 4 Ft At 7 Seconds. W Swell 3 Ft At 11 Seconds.|
|Tue Night...N Wind 20 To 25 Kt, Easing To 15 To 20 Kt After Midnight. Wind Waves N 4 Ft At 7 Seconds. W Swell 4 Ft At 11 Seconds.|
|Wed...N Wind 15 To 20 Kt With Gusts To 25 Kt. Wind Waves 3 Ft. W Swell 3 Ft.|
|Wed Night...N Wind 15 To 20 Kt With Gusts To 25 Kt. Wind Waves 3 Ft. W Swell 3 Ft.|
|Thu...N Wind 15 To 20 Kt. Wind Waves 4 Ft. W Swell 3 Ft.|
|Fri...N Wind 15 To 20 Kt. Wind Waves 4 Ft. Nw Swell 8 Ft.|
| Area Forecast Discussion|
National Weather Service Portland OR
240pm PDT Sunday May 9 2021
A few showers, mainly over the mountains, through early evening. High pressure will gradually shift over the region through midweek and result in mainly dry weather and warming temperatures. The next chance for rain appears likely to hold off until at least next weekend.
Tonight through Wednesday...Radar shows a lot of small showers across the area as a weak upper disturbance in northwest flow aloft moves across the region. Most of the showers are over the mountains and foothills. Showers to end this evening as high pressure aloft builds. Marine clouds should return to the coast and up the lower Columbia River for some clouds reaching the north Willamette Valley Monday morning. The weather pattern will bring dry conditions with a gradual warming trend through mid-week as the upper ridge strengthens over the region. Wednesday should be the warmest day this week with highs just around 80 for the interior valleys. Coastal area temperatures will be greatly influence by the marine layer so high temps for the next few days will be in the low to mid 60s. The surface pattern supports some marine clouds at the coast and up the lower Columbia River at night and morning hours, then breaking up during the afternoon, otherwise not much cloud cover.
Wednesday night through Sunday...Trends through next weekend look mostly dry. But the aforementioned upper ridge flattens Wednesday as an upper low now near the western end of the Aleutians flattens the ridge. It then carves out a trough over the NE Pacific by Fri. During this time we'll see gradual cooling with increasing onshore flow. But precipitation chances remain very low through at least Friday per deterministic and ensemble models. GFS and ECMWF show a few of the ensemble members with precipitation later Sat into Sun. For now will keep it dry through Sat, with slight chance Probability of Precipitation for Sunday per current blend of models. /mh
High pressure will be the dominant feature over the coastal waters through at least Friday. At the same time, a surface thermal trough will hug the south OR coast into northwest CA. The persistent north-south oriented pressure gradient will result in a prolonged period of northerly winds over the coastal waters, which will be strongest during the late afternoon and evening hours from Cascade Head southward. Seas will also be highest during the afternoon and evening hours, along with choppy conditions as wind wave action peaks. In general, expect 20-25 kt winds over the central waters and 15-20 kt winds over the northern waters each day this week. Southern portions of PZZ270 could see gusts as high as 25 kt, so will maintain the Small Craft Advisory for PZZ270 through this evening. -TK
.PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory until 11pm PDT this evening for coastal waters from Cape Shoalwater WA to Cascade Head OR out 60 NM.
Small Craft Advisory until 5am PDT Tuesday for coastal waters from Cascade Head OR to Florence OR out 60 NM.