Onalaska, WA Marine Weather and Tide Forecast

Marine Weather and Tide Forecast for Onalaska, WA

April 15, 2024 8:28 AM PDT (15:28 UTC) Change Location
Sunrise 6:21 AM   Sunset 8:02 PM
Moonrise 10:25 AM   Moonset 2:20 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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Marine Forecasts
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PZZ210 Columbia River Bar- 241 Am Pdt Mon Apr 15 2024

.small craft advisory in effect until 11 am pdt this morning - .

In the main channel -

General seas - 6 to 7 ft subsiding to 5 ft Tuesday morning.

First ebb - Ebb current of 4.11 kt at 1043 am Monday. Seas 6 ft.

SEcond ebb - Ebb current of 1.9 kt at 1141 pm Monday. Seas 5 to 6 ft.

Third ebb - Ebb current of 3.69 kt at 1154 am Tuesday. Seas 5 ft.

PZZ200 241 Am Pdt Mon Apr 15 2024

Synopsis for the southern washington and northern oregon coast - An upper trough grazes the region to the northeast today into Tuesday followed by a ridge of high pressure building overhead for the middle to end of the week. As a result rather benign conditions are expected across all waters moving forward.

7 Day Forecast for Marine Location Near Onalaska, WA
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Area Discussion for - Seattle, WA
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Area Forecast Discussion National Weather Service Seattle WA 202 AM PDT Mon Apr 15 2024

Upper-level troughing returns on Monday with showers and cooler temps. Then, ridging will rebound around midweek with the potential for more warmer and drier weather followed by the potential for a weak frontal passage over the weekend.

Near-zonal flow aloft as we're transitioning from weak ridging to upper-level troughing.
The weekend's above normal temperatures and dry weather will come to an end on Monday. The main feature will be convergence zone activity through much of central Puget Sound today and tonight.
However, scattered showers are to also track across western Washington and given current hi-res guidance they appear to be rather hit or miss. Light rainfall amounts are expected but locations in and around the convergence zone could see up to 0.25 to 0.50" in the foothills and higher elevations with locally higher amounts possible. Snow levels will also start off around 3,000 ft before falling to 2,000 ft tonight. With that, a few inches of snow won't be hard to achieve at the passes. Noticeably cooler highs are in the forecast with lower to mid 50s expected with overnight lows in the mid 30s to lower 40s.

Lingering showers and cooler temperatures will linger into Tuesday. However, most showers will be in and around the confines of the mountains given orographic enhancement. But, we'll begin to trend much drier on Wednesday as troughing progresses and upper-level ridging builds over the NE pacific. Because of this, not only will we see drier weather but highs will increase with mid 50s to lower 60s expected.

Conditions are continuing to trend drier Thursday and Friday. Deterministic guidance continues to hint at a ridge amplifying near the region.
But, questions remain on its exact location and intensity.
Nevertheless, the brief cool down to start the week on Monday may not last too long as temps could possibly top out in the upper 60s on Friday. Ahead, much uncertainty is present this far out, but a weak front could brush the area over the weekend.


Mainly VFR to MVFR with increasing high and mid-level clouds and low stratus over Grays Harbor. Westerly flow aloft as a cold front dig southward across western Washington through the early morning. Ceilings will continue to lower this morning with a 30% chance of MVFR ceilings persisting over the Puget Sound terminals through 20z. Scattered light rain showers and drizzle likely much of the day today and tonight as a convergence zone with enhanced shower activity and brief wind shifts sets up east of the Puget Sound.

KSEA...MVFR conditions with a thickening cloud deck near 2500 ft.
South winds at the surface are favored to shift to the E/NE after 19z as a convergence zone and enhanced shower activity develops. The exact placement of the convergence zone is still uncertain, but models favor the development this afternoon in southern King County/northern Pierce County. Winds may shift more northerly as the track of the convergence boundary shifts north/south. Best timing for this potential northerly wind shift looks to be in the 20-03Z timeframe this afternoon and evening.


A cold front continues to dive south across the area waters early Monday morning. Onshore flow continues, with gales through the Central and East Entrance to the Strait of Juan de Fuca until at 3 AM. Small Craft Advisories remain in effect through 11 AM Monday across the coastal waters and West Entrance to the Strait.
Winds will briefly ease through the morning with Gales being downgraded to Small Craft Advisories before they quickly pick up again Monday afternoon. A Gale Warning has been issued for the Central and East Strait along with Admiralty Inlet Monday afternoon through early Monday night, along with a Small Craft Advisory for the West Entrance and northern coastal waters.

Seas from 7 to 9 feet will increase closer to 10 feet Monday morning over the coastal waters before gradually lower back to 7 to 9 feet through the day Monday. Seas continue to lower through the week, trending below 5 feet Thursday and Friday.


No river flooding is expected through the next seven days.

PZ...Small Craft Advisory until 11 AM PDT this morning for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm- Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm-West Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Warning until 3 AM PDT early this morning for Central U.S.
Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Watch from this afternoon through late tonight for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S.
Waters Strait Of Juan De Fuca.

Small Craft Advisory until 3 AM PDT early this morning for Admiralty Inlet.

Gale Watch from this afternoon through late tonight for Admiralty Inlet.

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
LOPW1 - 9440422 - Longview, WA 33 mi58 min 52°F30.27
KLMW1 38 mi58 min 30.26
TCMW1 - 9446482 - Tacoma Met, WA 54 mi58 min WSW 8.9G12
TCNW1 - 9446484 - Tacoma, WA 54 mi58 min 50°F30.24

Wind History for No Ports station near this location
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KCLS CHEHALISCENTRALIA,WA 22 sm13 minSW 0610 smOvercast46°F43°F87%30.27
Link to 5 minute data for KCLS

Wind History from CLS
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Tide / Current for Longview, Washington - IGNORE HEIGHTS
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Tide / Current data from XTide NOT FOR NAVIGATION
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Longview, Washington - IGNORE HEIGHTS, Tide feet

Tide / Current for Longview, Columbia River, Washington
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Tide / Current data from XTide NOT FOR NAVIGATION
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Longview, Columbia River, Washington, Tide feet

Weather Map
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GEOS Local Image of Pacific Northwest   

Portland, OR,

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