Wednesday, December11, 2019
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Marine Weather and Tides
Marietta-Alderwood, 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 7:50AMSunset 4:15PM Wednesday December 11, 2019 1:33 PM PST (21:33 UTC) Moonrise 4:11PMMoonset 7:11AM Illumination 100% Phase: Full Moon; Moon at 15 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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PZZ133 Northern Inland Waters Including The San Juan Islands- 809 Am Pst Wed Dec 11 2019
.gale warning in effect through late tonight...
Today..SE wind 10 to 20 kt rising to 20 to 30 kt in the afternoon. Wind waves 1 to 3 ft building to 3 to 5 ft in the afternoon. Rain in the afternoon.
Tonight..SE wind 30 to 40 kt becoming S 20 to 30 kt after midnight. Wind waves 5 to 7 ft subsiding to 3 to 5 ft after midnight. Rain.
Thu..S wind 10 to 20 kt rising to 15 to 25 kt in the afternoon. Wind waves 2 to 4 ft. Rain likely in the morning then rain in the afternoon.
Thu night..SW wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Fri..SW wind 5 to 15 kt becoming S to 10 kt in the afternoon. Wind waves 2 ft or less.
Fri night..S wind 5 to 15 kt becoming to 10 kt after midnight. Wind waves 2 ft or less.
Sat..SE wind to 10 kt becoming ne. Wind waves 1 ft or less.
Sun..E wind to 10 kt. Wind waves 1 ft or less.
PZZ100 809 Am Pst Wed Dec 11 2019
Synopsis for the northern and central washington coastal and inland waters..A vigorous frontal system will move through the area this afternoon and evening. A trough will cross the area on Thursday. Onshore flow Thursday night will ease Friday. A weather disturbance will push onshore south of the area over the weekend.


7 Day Forecast for Marine Location Near Marietta-Alderwood, WA
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location: 48.76, -122.7     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 111652 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 852 AM PST Wed Dec 11 2019

UPDATE /Through this afternoon/. No real changes needed to today's forecast. Dry conditions this morning will give way to increasing coverage of rain showers by afternoon. A wet evening commute is expected across the metro area. Temperatures are currently in the low/mid 40s in the lowlands and they will warm a few degrees to near 50 degrees for highs today. Johnson

SHORT TERM /TODAY THROUGH FRIDAY/. Satellite imagery shows low clouds across much of Western Washington this morning with high clouds offshore ahead of the next system. Patchy fog will be around through the morning. A strong, December-like, frontal system will move onshore late this morning and slide east through today with active weather through Friday. This system will bring widespread rainfall for the Lowlands, as well as breezy conditions and mountain snow. Headlines through Friday for the system:

Lowland Rainfall: Scattered showers this morning with widespread rainfall this afternoon into tonight. The evening commute will be impacted. Post-frontal showers late tonight into Thursday morning. A secondary front will move through Thursday afternoon into Thursday night with more rain for the Lowlands. Post-frontal showers into Friday.

Snow levels: Snow levels will be generally between 3500 and 4500 feet through Thursday with the higher snow levels (around 4500 feet) across the Southern Cascades. Snow levels will lower to 2500 to 3500 feet feet Thursday night into Friday morning. This means that heavier snow accumulations are expected at Stevens Pass rather than Snoqualmie.

Snow Amounts: Accumulations generally 3-6 inches below 3500 feet (best chance of accumulation early Friday morning), 1-2 feet between 3500-4500 feet, and 2-4 feet above 4500 feet. Winter Storm Warning for the Cascades this afternoon through Friday morning. A Winter Weather Advisory in effect for the Olympics late this morning through Thursday evening.

Gusty Winds: Breezy southerly winds are expected with this system with a decent BLI-YZT gradient tonight. Gusts will generally be 20-30 MPH. Stronger winds with gusts 35-40 MPH will be possible along the coast and across the North Interior (Western Whatcom/Skagit and San Juans).

There will also be a slight chance of thunderstorms for the coast with the post-frontal showers Thursday afternoon into early Thursday night with cool air aloft. Temperatures through this week will be in the upper 40s to low 50s across Western Washington. JD

LONG TERM /SATURDAY THROUGH TUESDAY/. Post-frontal showers may be around through early Saturday morning as the system slides east. Another weather system may slide south of the area on Saturday, however, ensembles suggest at least the chance for POPs, especially for southern areas Saturday afternoon into Saturday night. Another system will move through Sunday into Monday. Ensembles do suggest the active pattern next week as well with mean troughing off the Pac NW. Temperatures will be near normal in the mid 40s for the weekend with upper 40s into next week. JD

AVIATION. A vigorous frontal system will move through Western Washington this afternoon and evening. Strong southwest flow aloft. Areas of low clouds are dispersing ahead of the front--although there are areas of low clouds along the east slopes and the north slopes of the Olympics that will persist today and then merge with the layers of frontal clouds. Elsewhere after the temporary improvement this morning, cigs will drop again as the rain moves ashore and spreads inland this afternoon. Tonight and Thursday will have periods of rain and typical Western Washington rainy day cigs.

KSEA . After improvement this morning rain will spread into the area this afternoon and keep cigs more continuously down around 2kft through tonight and Thursday. Breezy southerly winds developing later today.

MARINE. A strong frontal system will move through the area this afternoon and evening. A trough will move ashore on Thursday. Gale warnings are up for the coastal waters, east entrance to the Strait of Juan de Fuca, and the northern waters. For the coast, swell will build through Thursday.

HYDROLOGY. A wet storm system will impact the region this afternoon through Friday. Given precipitation amounts and snow levels in the 4000-5000 foot range - most rivers are not expected to approach flood stage. There is some concern that the Skokomish River in Mason County could approach flood stage. We will continue to monitor this situation.

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Storm Warning from 1 PM this afternoon to 10 AM PST Friday for Cascades of Pierce and Lewis Counties-Cascades of Snohomish and King Counties-Cascades of Whatcom and Skagit Counties.

Winter Weather Advisory until 9 PM PST Thursday for Olympics.

PZ . Gale Warning until 9 PM PST this evening 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.

Small Craft Advisory until 2 AM PST Saturday for Grays Harbor Bar.

Gale Warning until 1 AM PST Thursday for 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 Thursday for West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until midnight PST tonight for Central U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 4 AM PST Thursday for Admiralty Inlet.

Small Craft Advisory from 3 PM this afternoon to 5 PM PST Thursday for Puget Sound and Hood Canal.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46118 7 mi38 min 42°F 1012.5 hPa42°F
CHYW1 - 9449424 - Cherry Point, WA 8 mi45 min 1013.3 hPa
CPMW1 8 mi51 min NE 11 G 15 44°F
CPNW1 8 mi75 min ENE 12 G 16 44°F
FRDW1 - 9449880 - Friday Harbor, WA 22 mi57 min 48°F1012.7 hPa
PBFW1 - Padilla Bay Reserve, WA 24 mi63 min S 4.1 48°F 1013 hPa45°F
SISW1 - Smith Island, WA 31 mi173 min ESE 14 G 18 47°F 1014.7 hPa43°F
46088 - New Dungeness, WA (Hein Bank) 39 mi173 min ESE 14 G 16 1014.8 hPa
PTWW1 - 9444900 - Port Townsend, WA 45 mi51 min E 17 G 22 47°F 48°F1013.2 hPa

Wind History for Cherry Point South Dock, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bellingham, Bellingham International Airport, WA9 mi40 minNNE 610.00 miOvercast46°F39°F79%1014.1 hPa
Eastsound, Orcas Island Airport, WA11 mi38 minVar 6 G 1210.00 miOvercast45°F42°F93%1012.5 hPa
Friday Harbor Airport, WA24 mi40 minE 710.00 miOvercast48°F43°F83%1012.8 hPa

Link to 5 minute data for KBLI

Wind History from BLI (wind in knots)
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Last 24hrN3NE5NE3NE5NE3N3N4NE5N4N3N3CalmNE3N3N3CalmNE3NE3CalmN6N7NE4NE6NE6
1 day agoE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmE4CalmE4E6NE5E3NE4NE6
2 days agoN4NE3Calm--CalmCalmCalmN3CalmCalmN3N5N5N4N4N5N3N4N5CalmCalmCalmCalmE3

Tide / Current Tables for Point Migley, Washington
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Point Migley
Click for Map
Wed -- 05:59 AM PST     8.53 feet High Tide
Wed -- 07:11 AM PST     Moonset
Wed -- 07:53 AM PST     Sunrise
Wed -- 10:05 AM PST     6.70 feet Low Tide
Wed -- 03:07 PM PST     8.44 feet High Tide
Wed -- 04:11 PM PST     Moonrise
Wed -- 04:14 PM PST     Sunset
Wed -- 09:14 PM PST     Full Moon
Wed -- 10:17 PM PST     -1.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.82.345.77.28.28.58.27.676.76.87.37.88.28.48.27.35.73.41.1-0.8-1.6-1.5

Tide / Current Tables for Clark Island, 1.6 mile North of, Washington Current
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Clark Island
Click for MapFlood direction 335 true
Ebb direction 150 true

Wed -- 12:23 AM PST     0.00 knots Slack
Wed -- 03:25 AM PST     1.15 knots Max Flood
Wed -- 07:11 AM PST     Moonset
Wed -- 07:14 AM PST     -0.00 knots Slack
Wed -- 07:53 AM PST     Sunrise
Wed -- 08:58 AM PST     -0.64 knots Max Ebb
Wed -- 12:50 PM PST     0.00 knots Slack
Wed -- 02:45 PM PST     0.36 knots Max Flood
Wed -- 03:45 PM PST     -0.00 knots Slack
Wed -- 04:11 PM PST     Moonrise
Wed -- 04:14 PM PST     Sunset
Wed -- 08:21 PM PST     -1.79 knots Max Ebb
Wed -- 09:14 PM PST     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.40.91.11.10.90.50.1-0.4-0.6-0.6-0.4-0.200.30.3-0.1-0.6-1.1-1.5-1.8-1.7-1.5-1.1

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
Wind Forecast for Seattle, WA (16,3,4,5)
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Ground Weather Radar Station Seattle/Tacoma, WA
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