Sunday, January17, 2021
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Marine Weather and Tides
Onalaska, WA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:49AMSunset 4:54PM Saturday January 16, 2021 10:30 PM PST (06:30 UTC) Moonrise 10:15AMMoonset 8:57PM Illumination 15% Phase: Waxing Crescent; Moon at 4 days in cycle
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.
Marine Forecasts
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PZZ210 Columbia River Bar- 816 Pm Pst Sat Jan 16 2021
.small craft advisory in effect through Sunday evening...
In the main channel.. - general seas...around 8 ft, but building to 10 to 12 ft Sunday afternoon. - first ebb...around 745 am Sunday. Seas to 11 ft. - second ebb...around 745 pm Sunday. Seas to 13 ft. - third ebb...around 830 am Monday. Seas to 15 ft.
PZZ200 816 Pm Pst Sat Jan 16 2021
Synopsis for the southern washington and northern oregon coast.. High pressure over the waters will weaken tonight as a weak frontal system moves through the waters. High pressure returns Sunday and will persist through early next week. Meanwhile, thermal low pressure develops over the south oregon waters Sunday morning and then expands north Sunday night and Monday.


7 Day Forecast for Marine Location Near Onalaska, WA
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location: 46.51, -122.63     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 170455 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 855 PM PST Sat Jan 16 2021

SYNOPSIS. The next front moves through tonight with another round of light precipitation. An upper level ridge sets up over the area early next week bringing dry conditions through at least Wednesday. The next disturbance arrives later in the week, likely ushering in a cooler air mass

UPDATE /THIS EVENING/. Leading precipitation ahead of the approaching front continues to spread across the region this evening, reaching the I-5 corridor in the next couple of hours. Made a few adjustments to PoPs to account for latest radar & observation trends, but otherwise forecast remains on track. Previous short/long term sections follow below, with updated Marine/Aviation/Hydrology sections thereafter. Cullen

SHORT TERM /TONIGHT THROUGH TUESDAY/. Precipitation echoes from our next frontal system are starting to appear on the coastal radar this afternoon. Rain will move onshore overnight with the cold front passing through by Sunday morning. Much like Thursday night's system, this one is pretty weak and will only amount to light precipitation amounts. Snow levels will generally rise to around 3500-4000 feet so expect just a few inches at Stevens Pass and the volcanoes. Should cause only minor impacts to any travel. A few showers will linger in the Cascades through the afternoon but otherwise conditions dry out pretty quickly. High pressure then builds across the region for Monday into Thursday. The operational ECMWF continues to drop a weak system drop on top of the ridge Tuesday night for a few showers but GFS and most ensemble members are dry. Have kept a slight chance of showers in there for now, but will continue to monitor trends. Periods of clearing should lead to patchy morning fog around the Sound. Temperatures will be right around normal.

Carpenter

LONG TERM /WEDNESDAY THROUGH SATURDAY/. Aforementioned high pressure will prevail on Wednesday into Thursday with temperatures cooling to just below normal. Ridge shifts off to the east Thursday as large upper level low across the eastern Pacific drops southeast. 12z ECMWF has come more into line with 12Z GFS and drops the low south but is more to the west and south as it heads into California. GFS takes the low in closer proximity to Washington as it heads into Oregon - with wrap around precip affecting portions of the area. This would suggest the possibility of a rain/snow mix in the lowlands but latest ensemble solutions have backed off on the possibility of snow with only a member or two showing anything. Ridging likely rebounds for later Friday into Saturday with cooler northerly flow. Things become more interesting for the end of the weekend into next week as ensembles highlight a better probability of below normal temperatures and snow chances for the lowlands. At this point, it's anyone's guess so continue to stay tuned!

Carpenter

AVIATION. VFR conditions across most of Western Washington this evening ahead of the approaching front, though few areas of fog quickly developed around southern Puget Sound after sunset. Otherwise, expect ceilings and visibilities to trend into MVFR by 06z at the coast and closer to 09z inland as the front spreads rain and lower clouds across the region, with local IFR possible through the overnight. Southerly surface winds ahead of the front, with gusts to around 15-20 kt possible immediately ahead of the front. Residual clouds/showers expected Sunday with conditions improving to MVFR after 18z and areas of VFR in the afternoon with developing northerly winds through the interior.

KSEA . VFR conditions for the next several hours, but expect rain to begin at the terminal by 09z with lowering to MVFR ceilings behind the front. Confidence moderate for ceilings around 1500 ft between 13-20z, with improvement expected as front pushes east and clearing begins Sun morning. South surface winds return and strengthen as front approaches with shift to northerly winds probable Sunday afternoon. Cullen

MARINE. Seas subsiding a bit over the coastal waters, but south winds increasing ahead of the front. The front will push onshore, with developing northwest winds behind the front. Meanwhile, expect push of westerly winds through the Strait of Juan de Fuca Sunday morning. Small craft advisories remain unchanged with this update. Meanwhile, areas of fog will persist this evening around portions of southern Puget Sound. Winds ease on Sunday behind the front.

Meanwhile, seas over the coastal waters will build late overnight and especially early Sunday into the 10-13 ft range. This will be a mix of two west swells - a shorter period swell around 13 seconds and a more energetic 22 second swell. The longer swell will become dominant by Sunday night with seas likely peaking closer to 15-16 ft. High pressure likely rebuilds for the first part of next week with seas gradually trending lower. Cullen

HYDROLOGY. No river flooding is expected through the next seven days.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 4 PM PST Monday 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.

Small Craft Advisory from 10 AM Sunday to 4 PM PST Monday for Grays Harbor Bar.

Small Craft Advisory from 6 AM to 4 PM PST Sunday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 7 AM PST Sunday for Admiralty Inlet- Northern Inland Waters Including The San Juan Islands-Puget Sound and Hood Canal.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 33 mi43 min 45°F1028.6 hPa
TCMW1 - 9446482 - Tacoma Met, WA 54 mi43 min SE 4.1 G 4.1
TCNW1 - 9446484 - Tacoma, WA 54 mi43 min 44°F 49°F1028.5 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chehalis-Centralia Airport, WA22 mi36 minS 510.00 miOvercast46°F45°F93%1027.8 hPa

Link to 5 minute data for KCLS

Wind History from CLS (wind in knots)
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Last 24hrCalmNE4NE5Calm------CalmCalmCalmCalmCalmSW3SW4CalmCalmCalmCalmCalmCalmCalmCalmS5S8
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2 days agoCalmCalmCalmNE5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN4NE4SE5CalmS4SW3S7S6S6

Tide / Current Tables for Olympia, Washington
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Olympia
Click for Map
Sun -- 02:07 AM PST     0.07 feet Low Tide
Sun -- 07:51 AM PST     Sunrise
Sun -- 09:13 AM PST     16.11 feet High Tide
Sun -- 10:38 AM PST     Moonrise
Sun -- 03:24 PM PST     6.07 feet Low Tide
Sun -- 04:52 PM PST     Sunset
Sun -- 08:07 PM PST     11.44 feet High Tide
Sun -- 10:04 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.210.10.72.96.19.612.815.116.115.714.211.89.37.26.26.37.59.110.711.411.19.98

Tide / Current Tables for Nisqually Reach, Washington Current
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Nisqually Reach
Click for Map
Sun -- 02:52 AM PST     0.00 knots Slack
Sun -- 05:56 AM PST     1.34 knots Max Flood
Sun -- 07:50 AM PST     Sunrise
Sun -- 09:20 AM PST     -0.01 knots Slack
Sun -- 10:38 AM PST     Moonrise
Sun -- 12:51 PM PST     -1.04 knots Max Ebb
Sun -- 03:50 PM PST     0.01 knots Slack
Sun -- 04:51 PM PST     Sunset
Sun -- 06:05 PM PST     0.67 knots Max Flood
Sun -- 08:23 PM PST     -0.00 knots Slack
Sun -- 10:03 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.4-1.2-0.70.10.71.21.31.10.70.2-0.3-0.8-1-1-0.9-0.50.10.50.70.50.2-0.3-0.7-1.1

Weather Map
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wmap_P
GEOS Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station




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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.