Marine Weather Net

Cape Shoalwater WA to Cascade Head OR out 10 NM Marine Forecast


TONIGHT

W
WINDS
5 KNOTS

SUN

NW
WINDS
5 - 10
KNOTS

SUN NIGHT

N
WINDS
15 - 20
KNOTS

MON

N
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ250 Forecast Issued: 212 PM PDT Sat May 08 2021

Tonight...W Wind 5 Kt. Wind Waves W 1 Ft At 4 Seconds. W Swell 5 Ft At 9 Seconds.
Sun...Nw Wind 5 To 10 Kt With Gusts To 15 Kt, Rising To 10 To 15 Kt With Gusts To 20 Kt In The Afternoon. Wind Waves Nw 2 Ft At 5 Seconds. Nw Swell 5 Ft At 9 Seconds.
Sun Night...N Wind 15 To 20 Kt. Wind Waves N 3 Ft At 6 Seconds. Nw Swell 7 Ft At 11 Seconds.
Mon...N Wind 10 To 15 Kt With Gusts To 20 Kt. Wind Waves N 3 Ft At 5 Seconds. Nw Swell 6 Ft At 11 Seconds.
Mon Night...N Wind 15 To 20 Kt, Easing To 10 To 15 Kt After Midnight. Wind Waves N 3 Ft At 5 Seconds. W Swell 6 Ft At 11 Seconds.
Tue...N Wind 10 To 15 Kt With Gusts To 20 Kt. Wind Waves 3 Ft. W Swell 5 Ft.
Tue Night...N Wind 10 To 15 Kt With Gusts To 20 Kt. Wind Waves 3 Ft. W Swell 4 Ft.
Wed...N Wind 10 To 15 Kt. Wind Waves 3 Ft. W Swell 4 Ft.
Thu...N Wind 10 To 15 Kt. Wind Waves 3 Ft. W Swell 4 Ft.
SHARE THIS PAGE:           
Area Forecast Discussion
National Weather Service Portland OR
305pm PDT Sat May 8 2021

Synopsis
A warm front will brush our northern zones with some light rain and drizzle Saturday, followed by a few showers lingering into Sunday. High pressure then shifts eastward across the Pacific Northwest and likely produces dry weather and a gradual warming trend through at least Wednesday or Thursday.

Short Term
Tonight through Tuesday...Low pressure to the northeast and high pressure to the southwest is keeping the PacNW under cooler northwest flow today. Have seen light rainy periods mainly across our northern coastal areas from a nearly stalled warm front. but total accumulations have been fairly meager at best. Where rain has been able to push further inland, most of it has evaporated before reaching the ground leaving spotty sprinkles. Expect a very weak cold front will cross the region beginning close to midnight thus bringing a better chance of rain inland during the evening hours but am finding it hard to get excited about this event with regards to precipitation amounts, if any at all. Another weak frontal system crosses Sunday and have about as much excitement nor concern. Temperatures may be a few degrees warmer as high pressure pushes slightly more to the northeast and overhead.

Sunday post frontal showers will dissipate fairly quickly during the evening hours as the upper ridge begins a trend of becoming more established over the region. This will leave Monday and Tuesday dry. Monday's temperatures will again increase by a few degrees into the upper 60s inland before a bigger jump toward the mid 70s Tuesday. /JBonk

Long Term
Tuesday night through Saturday...Unfortunately not much precipitation to look forward to for most of next week as the upper ridge will slowly drift eastward over the PacNW. Models continue to show it with a fairly low amplitude. However, the position has pushed a bit further north than was shown over the last couple days. This means it will be harder for any shortwaves from the Gulf of Alaska to drop south over our area. Models and related ensembles are now keeping our forecast area dry on Thursday by digging a trough well offshore and keeping any significant rain threat with it. Late Friday is now the next minuscule opportunity to get rain, but minimal at best. Models are slightly more bullish for rain Saturday as the aforementioned offshore trough develops into a cutoff low off the southern California coast then moves east to leave the PacNW under a fairly dry split flow aloft. The only Probability of Precipitation in our forecast now are to account for some uncertainty with how far south the closed low actually develops.

Afternoon seabreezes will continue to mitigate some of the warming with Willamette Valley temperatures peaking in the upper 70s on Wednesday before slowly cooling toward the lower 70s Friday and around 70 on Saturday. /JBonk

Marine
Buoy observations earlier Saturday afternoon showed southerly winds gusting to around 20 kt at buoy 29 with less breezy conditions at buoy 50. It appears the breezier winds over the northern waters were occurring immediately ahead of a weak frontal boundary moving eastward across the coastal waters, which should reach the coast by late afternoon. Expect a wind shift behind the front Saturday evening, becoming west to northwest around 10 kt. Winds should decrease even more tonight.

High pressure will be the dominant feature over the coastal waters Sunday through next week. At the same time, a surface thermal trough will be present over northwest California and far southwest Oregon. This setup will result in a prolonged period of northerly winds over the coastal waters, which will be strongest over the central waters during the late afternoon and evening hours each day. This is when gusts to 25 kt are expected over the central waters, at least through the middle of next week. Therefore, a Small Craft Advisory remains in effect over the central waters from Sunday afternoon through Monday evening.

Model guidance continues to suggest seas will remain below 10 feet through Friday of next week with a west-northwest swell generally ranging between 4 and 6 feet. Conditions should be the most steep and choppy during the late afternoon and evening hours each day as wind wave action peaks. -TK

.PQR WATCHES/WARNINGS/ADVISORIES... OR...None. WA...None. PZ...Small Craft Advisory from noon Sunday to midnight PDT Monday night for coastal waters from Cascade Head OR to Florence OR out 60 NM.