Friday, November27, 2020
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Marine Weather and Tides
Des Moines, 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 7:29AMSunset 4:24PM Friday November 27, 2020 3:44 PM PST (23:44 UTC) Moonrise 3:24PMMoonset 4:36AM Illumination 94% Phase: Waxing Gibbous; Moon at 13 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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PZZ135 Puget Sound And Hood Canal- 231 Pm Pst Fri Nov 27 2020
.small craft advisory in effect until 10 pm pst this evening...
Tonight..S wind 20 to 30 kt easing to 10 to 20 kt after midnight. Wind waves 3 to 5 ft subsiding to 1 to 3 ft after midnight. A slight chance of rain in the evening then rain after midnight.
Sat..Light wind. Wind waves less than 1 ft. A slight chance of rain in the morning.
Sat night..Light wind. Wind waves less than 1 ft.
Sun..Light wind becoming se to 10 kt in the afternoon. Wind waves 1 ft or less.
Sun night..S wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Mon..S wind 15 to 25 kt becoming sw 10 to 20 kt in the afternoon. Wind waves 2 to 4 ft.
Mon night..Variable wind 5 to 15 kt in the evening becoming light. Wind waves 2 ft or less.
Tue..Light wind becoming N 5 to 15 kt. Wind waves 2 ft or less.
Wed..N wind 5 to 15 kt becoming variable. Wind waves 2 ft or less.
PZZ100 231 Pm Pst Fri Nov 27 2020
Synopsis for the northern and central washington coastal and inland waters..A frontal system will move through the area tonight. Weak high pressure will move over the area on Saturday then shift inland on Sunday. A second vigorous frontal system will move through the area Sunday night or Monday morning followed by a good shot of onshore flow later Monday. Weak high pressure will move over the area Monday night then offshore flow will develop on Tuesday and Wednesday.


7 Day Forecast for Marine Location Near Des Moines, WA
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location: 47.39, -122.35     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 272254 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 254 PM PST Fri Nov 27 2020

SYNOPSIS. Dry weather this afternoon with a system moving through tonight across the area. Rain, mountain snow, as well as breezy weather are expected for some locations. Drier weather Saturday afternoon through Sunday with some ridging building into the area. A stronger system will move through on Monday. Dry Tuesday through much of next week with an upper ridge over the area.

SHORT TERM /TONIGHT THROUGH MONDAY/. Dry weather this afternoon with increasing high clouds as a front approaches the area offshore. Rain will slide onshore this evening and move east across Western Washington through tonight. Breezy southerlies across areas of Whatcom/Skagit/San Juan Islands this evening as the front approaches. Light mountain snow expected tonight into early Saturday morning with snow levels around 3500 to 4500 feet for a few inches at Stevens Pass. Rain to rain/snow mix at Snoqualmie Pass. Some convergence activity may develop early Saturday morning around the central Puget Sound but drier weather for the afternoon as a ridge builds into the area.

Dry weather through most of Sunday with rain sliding onshore late Sunday into Sunday night as a front approaches. The system is expected to track through Sunday night into Monday for rain, mountain snow, and locally windy conditions. It is possible the system tracks a bit further south for less precipitation, which will need to be monitored. Otherwise, the forecast highlights rain Sunday night into Monday with snow for the mountains with snow levels 3000 to 4000 feet. Locally stronger winds for the coast and Whatcom/Skagit/San Juan Islands Sunday night with the front. A few showers around into Monday afternoon as the trough slides east of the area. Temperatures in the 40s to low 50s through early next week.

LONG TERM /TUESDAY THROUGH FRIDAY/. Dry weather Tuesday through next week as an upper ridge builds into the area. Guidance suggests a front approaches the area on Thursday, but most ensembles highlight the front dissipating before it reaches the coast with just slight precipitation chances along the coast on Thursday. Ridging for the area on Friday. Patchy fog may be possible a few of the mornings with the ridge over the area. Temperatures in the 40s to upper 50s through most of the week. JD

AVIATION. A weak upper trough and an associated front will move through the tonight with westerly flow aloft. Weak high pressure aloft will build over the area on Saturday. The air mass will be stable. Mostly high clouds across the area through early this evening. Low clouds and rain will move in from the west tonight as a front arrives. Low clouds will linger for most of Saturday.

KSEA . High clouds until late this evening. Low clouds and rain will develop around midnight tonight as a front arrives. Ceilings should lift a little Saturday afternoon then low clouds will likely scatter Saturday evening. Southerly wind 5-10 knots will become light and variable on Saturday. Schneider

MARINE. A frontal system will move through the area tonight. Small craft advisory strength southerly winds will accompany the front most waters. There could be an hour or two of low end gale force southerly winds for the northernmost part of the Coastal Waters and the Northern Inland Waters late this afternoon or early this evening right ahead of the front.

Onshore flow behind the front will quickly ease tonight with weak high pressure moving over the area on Saturday. Winds will turn more east to southeast and start to increase again on Sunday ahead of the next vigorous frontal system.

The aforementioned frontal system will move through the area Sunday night or Monday morning. There is some uncertainty with the exact timing but another round of small craft advisory strength winds are expected and gales are possible for the Coastal Waters, entrances to the Strait, and Northern Inland Waters.

There will be a good push of onshore flow behind the front on Monday - westerly gales are possible in the Strait - then winds will quickly ease as weak high pressure moves over the area again. Offshore flow will develop on Tuesday and continue into Wednesday. Schneider

HYDROLOGY. No river flooding is expected to occur in the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 4 PM PST Saturday 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-Grays Harbor Bar.

Small Craft Advisory until 4 AM PST Saturday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 10 PM PST this evening 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
TCMW1 - 9446482 - Tacoma Met, WA 9 mi56 min WSW 5.1 G 7
TCNW1 - 9446484 - Tacoma, WA 9 mi56 min 53°F 52°F1022.6 hPa
WPOW1 - West Point, WA 19 mi44 min S 17 G 19 51°F 1021.3 hPa (-2.3)43°F
46121 22 mi37 min Calm 52°F 1021.6 hPa41°F
46120 26 mi42 min SSW 9.7 52°F 1020.2 hPa42°F
46125 39 mi41 min 53°F 1019.2 hPa40°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA4 mi51 minSSW 810.00 miMostly Cloudy50°F39°F68%1022.4 hPa
Boeing Field - King County International Airport, WA10 mi51 minS 610.00 miA Few Clouds51°F39°F64%1021.6 hPa
Renton Municipal Airport, WA10 mi51 minS 610.00 miFair52°F39°F61%1022.2 hPa
Tacoma, Tacoma Narrows Airport, WA15 mi51 minSW 510.00 miFair49°F37°F64%1021.9 hPa
Tacoma / McChord Air Force Base, WA17 mi46 minW 510.00 miFair52°F39°F64%1022.2 hPa
Pierce County-Thun Field, WA20 mi69 minSW 510.00 miFair55°F37°F51%1021.7 hPa
Bremerton, Bremerton National Airport, WA23 mi48 minSSW 910.00 miFair50°F41°F71%1022 hPa
Fort Lewis / Gray U. S. Army Airfield, WA24 mi46 minSW 410.00 miFair52°F48°F88%1021.8 hPa

Link to 5 minute data for KSEA

Wind History from SEA (wind in knots)
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Last 24hrSW9S5S5S8S8S9S10S9S7S7S7S7SE6S6S7S7S10W3S3S5SW7S5SW7SW8
1 day agoSW8S4CalmS3CalmS3SW7E4S6SE4S4SE4S4SE6S6S7SW6S7S11S8S9
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2 days agoSW13SW13
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Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Fri -- 03:53 AM PST     10.08 feet High Tide
Fri -- 04:36 AM PST     Moonset
Fri -- 07:31 AM PST     Sunrise
Fri -- 09:00 AM PST     5.70 feet Low Tide
Fri -- 02:36 PM PST     11.16 feet High Tide
Fri -- 03:22 PM PST     Moonrise
Fri -- 04:22 PM PST     Sunset
Fri -- 09:37 PM PST     0.61 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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57.18.79.810.19.68.57.26.15.76.17.18.610.11111.110.38.86.64.22.10.80.71.7

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Fri -- 12:56 AM PST     -0.00 knots Slack
Fri -- 03:29 AM PST     -1.27 knots Max Ebb
Fri -- 04:37 AM PST     Moonset
Fri -- 06:38 AM PST     0.00 knots Slack
Fri -- 07:32 AM PST     Sunrise
Fri -- 08:56 AM PST     1.57 knots Max Flood
Fri -- 12:34 PM PST     -0.00 knots Slack
Fri -- 03:23 PM PST     Moonrise
Fri -- 03:34 PM PST     -1.47 knots Max Ebb
Fri -- 04:23 PM PST     Sunset
Fri -- 06:54 PM PST     0.00 knots Slack
Fri -- 09:31 PM PST     1.85 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1-0.3-1-1.2-1.2-1.1-0.80.71.41.61.51.20.7-0.7-1.2-1.4-1.5-1.3-10.31.41.81.81.7

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 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.