Marine Weather Net

Cape Shoalwater WA to Cape Lookout OR between 150 and 250 NM Offshore Forecast


TONIGHT

NNE
WINDS
5 - 15
KNOTS

THU

NE
WINDS
5 - 15
KNOTS

THU NIGHT

NE
WINDS
5 - 15
KNOTS

FRI

NE
WINDS
5 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ905 Forecast Issued: 832 PM PDT Wed Apr 17 2024

Tonight...N To Ne Winds 5 To 15 Kt. Seas 5 To 6 Ft.
Thu...Ne Winds 5 To 15 Kt. Seas 4 To 6 Ft.
Thu Night...Ne Winds 5 To 15 Kt. Seas 4 To 5 Ft.
Fri...Ne Winds 5 To 15 Kt, Becoming E 5 To 10 Kt. Seas 4 To 5 Ft.
Fri Night...E Winds 5 To 10 Kt, Becoming E To Se 5 To 15 Kt. Seas 4 To 5 Ft.
Sat...S To Sw Winds 20 To 30 Kt, Becoming W To Sw. Seas 6 To 10 Ft, Building To 11 To 17 Ft.
Sat Night...W Winds 20 To 30 Kt. Seas 11 To 17 Ft.
Sun...W To Nw Winds 15 To 25 Kt. Seas 9 To 14 Ft.
Sun Night...Nw Winds 10 To 20 Kt, Becoming N 5 To 15 Kt. Seas 7 To 11 Ft.
Mon...N To Nw Winds 5 To 15 Kt. Seas 5 To 8 Ft.
Mon Night...N To Nw Winds 10 To 20 Kt, Becoming S To Sw 5 To 15 Kt. Seas 4 To 6 Ft.
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Area Forecast Discussion
National Weather Service Portland OR
220pm PDT Wednesday April 17 2024

Synopsis
High pressure over the region will remain through Friday, maintaining mild sunny days and cool clear nights. Offshore flow increases a bit for Thu and Fri, with uptick of easterly winds. Back to cooler conditions this weekend, as a front pushes across the region on Sat.

.SHORT TERM...Today through Friday
High pressure is developing, bringing warm daytime temperatures and generally clear skies throughout the area. As a result of clear skies, temperatures tonight cool to around the mid to upper 30s, with the possibility of some isolated frost in the central and south Willamette Valley only.

Thursday and Friday see slightly warmer temperatures as the ridge settles in, with a 50-60% chance of daytime temperatures over 70 in the entire Willamette Valley on Thursday, increasing to 70-80% on Friday. A thermal trough begins to develop, and offshore flow will begin picking up Thursday, particularly through the Gorge. Gusts up to 25mph or so begin to develop in the western Gorge Thursday morning. Friday looks gustier, with gusts up to 35mph possible in the Gorge, slightly higher at exposed areas at higher elevation. /JLiu

Long Term
Saturday through Tuesday
Models have been consistent, and persistent, in showing a weakening front arriving on Saturday. As such, will be cooler day, with increasing clouds. Ensemble guidance is pointing towards Quantitative Precipitation Forecast being quite minimal, with only a few hundredths expected in the Willamette Valley, and around 0.25" at the Coast Range, Cascades, and coast. Onshore flow, with clouds and few showers around for Sat night into Sun. Ensemble guidance shows good agreement on a shortwave ridge moving through the area Sunday afternoon, though uncertainty still exists on how long it's expected to continue. Monday looks dry, but lower certainty on Tuesday. -Rockey/JLiu

Marine
High pressure off the WA/B.C. coast has started to move more onshore through the day along with a strengthening thermal trough along the south Oregon coast will persist through Friday. The high pressure will continue to shift inland on Thursday shifting winds front northerly to easterly. This configuration breaks down Friday night as a Pacific front approaches and moves through the waters Saturday. Northerly wind gusting to 25 to 30 kt expected for most of the waters through the evening, so a Small Craft Advisory remains in effect for PZZ252, 253, 272, 273. The southern and central outer waters hang onto gusty winds through the night and into Thursday morning with the Small Craft Advisory remaining in effect until 11am Thursday.

General seas through the weekend of 4 to 6 feet at 11 to 17 seconds, consisting of a long period southwest swell or a shorter period west to northwest swell. -Batz/mh

NOAA Portland OR Office: Watches - Warnings - Advisories
OR...None. WA...None. PZ...Small Craft Advisory until 11pm PDT this evening for PZZ252- 253. Small Craft Advisory until 5am PDT Thursday for PZZ272-273.