Monday, December16, 2019
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Marine Weather and Tides
Federal Way, WA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:48AMSunset 4:21PM Monday December 16, 2019 5:29 AM PST (13:29 UTC) Moonrise 9:28PMMoonset 11:34AM Illumination 77% Phase: Waning Gibbous; Moon at 19 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- 233 Am Pst Mon Dec 16 2019
.small craft advisory in effect from 7 am pst this morning through this afternoon...
Today..S wind 15 to 25 kt. Wind waves 2 to 4 ft. A slight chance of rain.
Tonight..SE wind 10 to 20 kt becoming S 5 to 15 kt after midnight. Wind waves 1 to 3 ft. A slight chance of rain.
Tue..S wind 10 to 20 kt. Wind waves 1 to 3 ft. A slight chance of rain.
Tue night..SE wind 5 to 15 kt becoming S 10 to 20 kt after midnight. Wind waves 1 to 3 ft.
Wed..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Wed night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Thu..SE wind 10 to 20 kt becoming S to 10 kt. Wind waves 1 to 3 ft subsiding to 1 ft or less.
Fri..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 233 Am Pst Mon Dec 16 2019
Synopsis for the northern and central washington coastal and inland waters..A warm front will brush the area today. A series of frontal systems will move through the area beginning Wednesday and continue through much of the week with breezy conditions likely.


7 Day Forecast for Marine Location Near Federal Way, WA
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location: 47.33, -122.34     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 161055 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 255 AM PST Mon Dec 16 2019

SYNOPSIS. A warm front will brush portions of the area today for some light rain. Weak high pressure will be in place for Tuesday. A broad upper level trough will develop over the northeast Pacific by midweek with a series of potent systems later this week into the weekend bringing lowland rain, mountain snow, and locally windy conditions.

SHORT TERM /TODAY THROUGH WEDNESDAY/. Radar this morning shows light rain along the coast sliding eastward as a warm front lifts north over the area. Light rain will be most prevalent over the Olympic Peninsula and North Interior today, but light rain will also be possible elsewhere as the warm front moves through. Mostly cloudy across Western Washington today with high temperatures in the mid 40s.

Conditions will generally dry out tonight into Tuesday with weak high pressure over the area and easterly flow, though still a slight chance for showers along the coast and North Interior given the vicinity of the warm front and approaching system. Some sunshine may around Tuesday morning with limited fog development given the easterly flow. Clouds will be widespread by Tuesday afternoon as the next system approaches the coast. Temperatures on Tuesday will be in the mid to upper 40s.

The next frontal system will move onshore Tuesday night and slide across Western Washington on Wednesday as a broad upper level trough develops over the Northeast Pacific. This initial wave will produce light rain across the interior with light mountain snow by Wednesday afternoon. Snow levels will be rather low Wednesday from 1500 to 2500 feet. Locally windy conditions are also possible, especially for the North Interior, as the system moves through. A second front will slide through Wednesday night and set the stage for a rather active pattern for the end of the week. JD

LONG TERM /THURSDAY THROUGH SUNDAY/. Thursday into the weekend will be active for Western Washington as a series of weather systems move through the area. Deterministic and ensemble guidance has a fairly significant plume of moisture focused on the Pacific NW, specifically southern WA into central OR, Thursday through Saturday with upper level troughing over the Northeast Pacific. Where exactly the moisture plume sets up will determine the vicinity of heaviest precipitation with some degree of uncertainty in the guidance. Even so, 5-day precipitation anomalies on GEFS, EPS suggest positive values of 1 to 3 inches for the Pacific Northwest. This will support rapid rise on some rivers into the weekend. Snow levels will also be relatively low, especially for Central and North Cascades. This will promote mountain snow for both Passes, some of which may be heavy Thursday and Friday.

Guidance does suggest the upper level trough will slide eastward on Sunday as an upper level low dives along the coast offshore. There will be showers around given the vicinity of the upper low and trough moving through. Temperatures later this week through the weekend will be steady in the mid to upper 40s. JD

AVIATION. A weak warm front will move into the area today with westerly flow aloft. The warm front will shift north of the area tonight with southwest flow aloft. At the surface, easterly flow will prevail with high pressure over Eastern Washington and lower pressure offshore. The air mass is moist and stable.

There is a mix of clouds across the area early this morning -mostly high clouds over the north with VFR low and mid clouds farther south and a few pockets of IFR low clouds and fog over the south interior.

The trend today will be for increasing low and mid level moisture as the warm front moves in. Ceilings should lower to MVFR most areas by this afternoon. Ceilings will then rise tonight as the warm front pushes north of the area and the low levels dry a bit.

KSEA . 4-6kft ceilings should lower to 2-3kft by early afternoon as a warm front arrives. Ceilings should improve this evening as the warm front moves out of the area. Southeast wind 4-8 knots.

MARINE. A warm front is currently making eastward progress across the Coastal Waters early this morning. An area of widespread stratiform rain showers is associated along and out ahead of this frontal boundary. Rain showers will be likely across the offshore waters, into the Strait of Juan de Fuca and across the northern interior waters today. The front should weaken through the day as it makes progress inland, causing the rain shield to break up and become more scattered. Puget Sound and adjacent waters are likely to be rain shadowed for much of the day, tho a few showers may develop in the afternoon.

The bigger story will be the winds this week. A small craft advisory is currently in effect for the Coastal Waters, western Strait, eastern Strait, Northern Inland Waters, Puget Sound (this is newly issued with this forecast package thru 4PM today and will affect mainly the northern portion of the Sound), and Admiralty Inlet. Winds will likely ease across the western Strait and Puget Sound this evening, but will remain small craft for the remaining waters through Tuesday. In fact, headlines will likely need to be extended further in time with future forecast updates.

Winds look to increase further early Wednesday as the next frontal system approaches. Higher-res model guidance is suggestive of gale force winds across the eastern Strait and Northern Inland Waters. This will need to be monitored. But regardless, looks like another breezy day across the waters out ahead and as the front passes thru. Several additional systems will likely follow on the heels on of Wednesday's front to keep winds elevated through the remainder of the week.

Kovacik

HYDROLOGY. There are no flooding concerns through the first half of this week. The latter part of this week will be wet as a series of systems moves across Western Washington Wednesday through Saturday. Although snow levels will be relatively low, the intensity of precipitation Thursday-Friday will support rapid rises on some rivers. Rivers across the southern portions of WA, such as the Chehalis, Newaukum, and Skokomish, will bear watching. Local rivers along the Cascades will need to be monitored as well with current forecasts for the South Fork Nooksack and Tolt Rivers approaching flood stage Friday into Saturday.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 4 PM PST Tuesday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm.

Small Craft Advisory until 5 AM PST early this morning for Grays Harbor Bar.

Small Craft Advisory until 4 PM PST Tuesday for Admiralty Inlet- Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm-East Entrance U.S. Waters Strait Of Juan De Fuca- Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory until 4 PM PST this afternoon for West Entrance U.S. Waters Strait Of Juan De Fuca.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCMW1 - 9446482 - Tacoma Met, WA 6 mi66 min SSE 1.9 G 4.1
TCNW1 - 9446484 - Tacoma, WA 6 mi66 min 37°F 51°F1027.7 hPa
46121 21 mi59 min 1.9 41°F 1027.6 hPa40°F
WPOW1 - West Point, WA 23 mi90 min SSE 12 G 12 41°F 1027.2 hPa (+0.4)37°F
46120 30 mi41 min ESE 1.9 42°F 1026.1 hPa37°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, WA8 mi37 minSSE 710.00 miOvercast39°F30°F73%1027.5 hPa
Renton Municipal Airport, WA13 mi37 minSSE 410.00 miOvercast37°F33°F86%1027.5 hPa
Tacoma, Tacoma Narrows Airport, WA13 mi37 minN 010.00 miOvercast37°F34°F89%1027.2 hPa
Boeing Field - King County International Airport, WA14 mi37 minSSE 410.00 miOvercast38°F34°F86%1027.1 hPa
Tacoma / McChord Air Force Base, WA14 mi92 minN 08.00 miMostly Cloudy32°F32°F100%1027.7 hPa
Pierce County-Thun Field, WA16 mi55 minN 010.00 miOvercast32°F32°F100%1026.7 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi92 minN 010.00 miPartly Cloudy32°F32°F100%1027.4 hPa

Link to 5 minute data for KSEA

Wind History from SEA (wind in knots)
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Last 24hrSE4S5S4CalmS6S6S5S6S5SW7CalmS3SE4SE65SE5E7SE6SE7SE6E7SE10SE8S7
1 day agoS5S6S7S6S7SE7SE7S6S4SE5CalmCalmCalmE3NE4E4NE3S3SE4S3S3E7CalmSE3
2 days agoS10S9S10S8S43SW5S7SW9SW7SW6SW4CalmW3SW3W5SW4W4CalmSW4S3CalmCalmS5

Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Mon -- 01:14 AM PST     -1.64 feet Low Tide
Mon -- 07:50 AM PST     Sunrise
Mon -- 08:40 AM PST     13.24 feet High Tide
Mon -- 11:33 AM PST     Moonset
Mon -- 02:27 PM PST     6.97 feet Low Tide
Mon -- 04:19 PM PST     Sunset
Mon -- 06:53 PM PST     9.92 feet High Tide
Mon -- 09:27 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-1.6-1.20.63.36.49.411.71313.212.511.19.47.97.17.17.88.89.69.99.48.16.13.8

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Mon -- 01:40 AM PST     1.95 knots Max Flood
Mon -- 05:44 AM PST     -0.04 knots Slack
Mon -- 07:51 AM PST     Sunrise
Mon -- 08:37 AM PST     -1.35 knots Max Ebb
Mon -- 11:34 AM PST     Moonset
Mon -- 11:58 AM PST     0.04 knots Slack
Mon -- 02:07 PM PST     1.20 knots Max Flood
Mon -- 04:20 PM PST     Sunset
Mon -- 04:52 PM PST     -0.00 knots Slack
Mon -- 08:30 PM PST     -1.33 knots Max Ebb
Mon -- 09:28 PM PST     Moonrise
Mon -- 11:01 PM PST     0.05 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.91.91.81.40.8-0.6-1.1-1.3-1.3-1.1-0.80.10.91.21.10.8-0.4-0.9-1.1-1.3-1.3-1-0.1

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.
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Wind Forecast for Seattle, WA (8,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, WA
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