Thursday, April9, 2020
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Marine Weather and Tides
Clallam Bay, WA

Version 3.4
NOTICE
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 6:32AMSunset 7:57PM Thursday April 9, 2020 4:41 PM PDT (23:41 UTC) Moonrise 9:26PMMoonset 6:50AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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PZZ131 Central U.s. Waters Strait Of Juan De Fuca- 242 Pm Pdt Thu Apr 9 2020
Tonight..W wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..W wind 5 to 15 kt becoming nw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Fri night..W wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sat..NE wind 5 to 15 kt becoming se 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Sat night..Variable wind 5 to 15 kt becoming sw to 10 kt after midnight. Wind waves 2 ft or less.
Sun..NE wind to 10 kt. Wind waves 1 ft or less.
Sun night..N wind to 10 kt becoming W after midnight. Wind waves 1 ft or less.
Mon..Light wind becoming W 5 to 15 kt. Wind waves 2 ft or less.
Tue..N wind to 10 kt becoming w. Wind waves 1 ft or less.
PZZ100 242 Pm Pdt Thu Apr 9 2020
Synopsis for the northern and central washington coastal and inland waters..Northerly flow will persist over the coastal waters through at least Friday afternoon while onshore flow is expected through the strait. This may allow for small craft advisory level winds Friday night into Saturday. Otherwise, generally calm conditions are expected.


7 Day Forecast for Marine Location Near Clallam Bay, WA
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location: 48.17, -123.98     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 092142 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 242 PM PDT Thu Apr 9 2020

SYNOPSIS. Another mild and sunny day across Western Washington with variable high clouds and temperatures above normal. High pressure aloft breaks down through Friday, allowing a weak impulse to brush the northern portion of the region by early Saturday. Northerly or northwesterly flow redevelops by the end of the weekend, with dry conditions likely continuing through much of next week.

SHORT TERM /TONIGHT THROUGH SUNDAY/. Another mild and sunny afternoon across Western Washington as temperatures continue to climb through the 60s at many locations, with it even closing in on 70 in places such as Chehalis as of 2 PM. Expect a handful of site may also achieve the 70 degree mark. Otherwise, some thin high clouds spreading overhead this afternoon but not too much else of note save for the remnants of this morning's marine stratus over the southern coastal waters.

The upper level ridge will gradually flatten tonight through early Friday, with the low-level onshore flow strengthening a bit overnight. As a result, expect marine stratus to push into the coast and more widespread cloud cover through the day on Friday. As the energetic upper level impulse moves south through coastal British Columbia and finally across the northern portions of the forecast area Friday night and Saturday, some light precipitation is possible across the north and particularly extending into the foothills and Cascades. However, with best forcing expected to remain to the east of the Cascades and a fast moving system, maintained generally light QPF for the areas that have precipitation chances mentioned. For most of the region, the additional cloud cover (holding temperatures several degrees cooler than today) and breezy winds will be the biggest impacts from this system. A drying trend takes hold into Sunday, however, as a more northerly flow again develops over the region. Cullen

LONG TERM /MONDAY THROUGH THURSDAY/. A high amplitude ridge is expected to develop over the northeastern Pacific early next week, which should bring about another couple of dry days with rising heights rise into Tuesday with Western Washington remaining in between the offshore Pacific ridge and the deep trough across much of the CONUS. Can't rule out the potential for a shortwave embedded in the northwesterly flow to clip part of the region late Tuesday, but continued to maintain a dry forecast with ensembles showing very little support for much in the way of precipitation. Generally dry and warmer into the second half of next week, though the timing of various impulses in the flow may bring at least increased clouds in onshore flow at times. Cullen

AVIATION. Northwesterly flow aloft persists over W WA today and into Friday. Surface flow generally from the north although coastal sites currently seeing onshore flow. Clear skies in place over all of W WA with these VFR conditions are expected to remain in place for the duration of the TAF forecast period. Will start to see an increase in high and mid level clouds over W WA Friday afternoon as a weak system approaches the area.

KSEA . VFR conditions through the period with northwesterly winds ranging from 6 to 10 knots before turning more northeasterly and decreasing in speed to around 5 knots after sunset. 18

MARINE. Northerly flow will persist across the coastal waters through at least Friday afternoon with westerlies in place over the Strait. Winds over the coastal waters struggling to meet SCA criteria but forecasts continue to show winds nudging up into low- end SCA criteria. Will leave inherited SCA up for afternoon package although confidence remains low in the headline itself. Will brief evening shift to re-evaluate and potentially bring it down early should winds continue to fail to materialize. Next best chance for SCA winds will be with weak system Friday night into Saturday with the coastal waters . portions of the Strait and the northern inland waters all looking to hit criteria. As this falls into third period and beyond . will take no action at this time. Once that system passes . quieter conditions are expected to resume for the remainder of the forecast period as upper level ridging once again sets up over the area. 18

HYDROLOGY. River flooding is not expected through the next seven days.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 2 AM PDT Friday for coastal waters from Cape Flattery To Cape Shoalwater Out 60 nm.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46267 20 mi161 min 47°F1 ft
PTAW1 - 9444090 - Port Angeles, WA 29 mi131 min NNE 1.9 G 1.9 58°F 47°F1020.7 hPa
NEAW1 - 9443090 - Neah Bay, WA 36 mi131 min 49°F1021 hPa
LAPW1 - 9442396 - La Push, WA 39 mi131 min NNW 16 G 19 48°F 47°F1021.2 hPa
DESW1 - Destruction Island, WA 43 mi161 min NW 23 G 25 49°F 1020.5 hPa (-1.7)
46088 - New Dungeness, WA (Hein Bank) 44 mi111 min SW 3.9 G 3.9 1 ft1021 hPa
46087 - Neah Bay, WA (Traffic Separation Lighted Buoy) 45 mi141 min WNW 9.7 G 12 48°F 49°F4 ft1020.7 hPa

Wind History for Port Angeles, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Angeles Fairchild International Airport, WA26 mi48 minVar 510.00 miFair52°F39°F64%1020.4 hPa

Link to 5 minute data for KCLM

Wind History from CLM (wind in knots)
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Last 24hrE34E3CalmW3CalmCalmSW3S3CalmCalmCalmSW5CalmS3CalmCalm54E54N5Calm5
1 day agoN4NW3NW3CalmCalmSW4SW3W3SW5CalmCalmSW4SW6SW5SW4CalmE5E76E6644E6
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W10W10W9W8W6W10W11W9W8W8SW5SW3W4SW6SW7NW8NW7N6NW7NW565

Tide / Current Tables for Twin Rivers, Strait of Juan de Fuca, Washington
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Twin Rivers
Click for Map
Thu -- 03:04 AM PDT     7.83 feet High Tide
Thu -- 06:36 AM PDT     Sunrise
Thu -- 07:50 AM PDT     Moonset
Thu -- 09:41 AM PDT     -1.00 feet Low Tide
Thu -- 03:47 PM PDT     7.17 feet High Tide
Thu -- 07:58 PM PDT     Sunset
Thu -- 09:50 PM PDT     0.42 feet Low Tide
Thu -- 10:26 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.267.37.87.56.34.62.60.7-0.7-0.90.22.145.76.97.16.65.33.72.10.80.41.4

Tide / Current Tables for Juan De Fuca Strait (East), British Columbia Current
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Juan De Fuca Strait (East)
Click for Map
Thu -- 01:50 AM PDT     0.00 knots Slack
Thu -- 04:16 AM PDT     1.79 knots Max Flood
Thu -- 06:34 AM PDT     Sunrise
Thu -- 06:40 AM PDT     -0.00 knots Slack
Thu -- 07:48 AM PDT     Moonset
Thu -- 10:30 AM PDT     -3.05 knots Max Ebb
Thu -- 02:22 PM PDT     0.00 knots Slack
Thu -- 05:03 PM PDT     1.96 knots Max Flood
Thu -- 07:57 PM PDT     Sunset
Thu -- 08:04 PM PDT     -0.00 knots Slack
Thu -- 10:24 PM PDT     Moonrise
Thu -- 11:26 PM PDT     -2.24 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.9-0.90.21.21.81.60.8-0.4-1.5-2.4-3-3-2.5-1.6-0.40.71.621.710.1-0.9-1.7-2.2

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
Wind Forecast for Seattle, WA (19,4,5,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.