Saturday, December14, 2019
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Marine Weather and Tides
Bryn Mawr-Skyway, 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 7:47AMSunset 4:19PM Saturday December 14, 2019 4:42 AM PST (12:42 UTC) Moonrise 6:59PMMoonset 10:10AM Illumination 92% 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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PZZ135 Puget Sound And Hood Canal- 227 Am Pst Sat Dec 14 2019
Today..SW wind to 10 kt. Wind waves 1 ft or less. A chance of rain.
Tonight..S wind to 10 kt. Wind waves 1 ft or less. A slight chance of rain in the evening.
Sun..SW wind to 10 kt becoming S in the afternoon. Wind waves 1 ft or less. Patchy dense fog in the morning.
Sun night..S wind to 10 kt becoming 5 to 15 kt after midnight. Wind waves 2 ft or less.
Mon..S wind 5 to 15 kt. Wind waves 2 ft or less.
Mon night..SE wind 5 to 15 kt. Wind waves 2 ft or less.
Tue..SE wind 5 to 15 kt. Wind waves 2 ft or less.
Wed..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 227 Am Pst Sat Dec 14 2019
Synopsis for the northern and central washington coastal and inland waters..Weak flow through the weekend will lend to quieter conditions across area waters. Low level offshore flow is expected to develop early next week as surface ridging builds east of the cascades. A few organized frontal systems will likely impact the area beginning mid-week.


7 Day Forecast for Marine Location Near Bryn Mawr-Skyway, WA
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location: 47.52, -122.26     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 141038 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 238 AM PST Sat Dec 14 2019

SYNOPSIS. Expect isolated to scattered showers today and Sunday as weak upper level disturbances clip the area. A warm front will brush the area on Monday. A more active weather pattern will potentially make a return mid to late next week.

SHORT TERM /TODAY THROUGH MONDAY/. A weak upper level disturbance will trigger isolated to scattered showers across western WA today. Snow levels will remain low in the mountains, around 2500 feet, with a few inches of snow possible at the passes. A few more showers are expected on Sunday as another upper level disturbance tracks down from B.C. (although shower coverage looks less compared to today). Temperatures will be close to normal with highs in the 40s and lows dipping into the 30s.

A warm front will clip the region on Monday for a chance of rain. Rainfall amounts are generally light with just a few hundredths in the interior and around a tenth of an inch at the coast. This weak front will stall over southern B.C. as we move into Monday night, with light rain possible near the Canadian border. 33

LONG TERM /TUESDAY THROUGH FRIDAY/. An upper level trough will dig offshore Tuesday and Wednesday while a weak/splitting front clips WA. Rain will increase Wednesday night and Thursday as a strong jet steers moisture toward the Pac NW. We may see another period of heavy snow in the Cascades during this period as snow levels will remain low. The pattern will remain active toward the weekend as a stronger Pacific frontal system arrives. 33

AVIATION. Northwesterly flow aloft as an upper level ridge shifts into the coastal waters. The air is stable and moist with a few showers across Western Washington. Cigs are LIFR across the South Sound at KOLM, KPWT. MVFR/IFR cigs into central/northern Puget Sound with spots of LIFR. Expect MVFR/IFR cigs through the morning with LIFR for the current spots in the South Sound. Patchy fog across the South Sound as well, will monitor other locations for fog development, though may be limited with low clouds. MVFR/VFR for the afternoon. Winds light southerly through today.

KSEA . IFR cigs expected this morning. Fog development should be limited to the South Sound, especially with low clouds. Cigs should improve to VFR this afternoon, but it is possible cigs are MVFR this afternoon through tonight with low to mid level clouds. Light southerly winds. JD

MARINE. A weak disturbance has allowed for the continuation of scattered showers across the waters early this morning. With the disturbance lingering through much of the day today, think spotty activity will stick around, although coverage will not be all that impressive overall. Winds across all waters are light and will remain below headline criteria through the weekend.

The only remaining headline continues to be the small craft advisory for the Coastal Waters and the western strait of Juan de Fuca for hazardous seas. West swell of generally 11-13 ft can be expected through the morning hours before decreasing between 9-11 ft and eventually subsiding below 10ft this evening. The western Strait swell will subside a few hours before the Coastal Waters swell this afternoon , tho will keep expiration of the headline for both zones at 4pm this afternoon. Seas will then remain calm through the weekend.

The next notable frontal system will approach the area late Tuesday into Wednesday. Winds look to pick up back to small craft advisory levels for many of the marine zones beginning Monday well ahead of the front as warm air advection increases. Winds will likely remain elevated thru frontal passage and quite possibly for much of the remainder of the week given an active storm track.

Kovacik

HYDROLOGY. There are no flooding concerns at this time as shower activity will remain scattered and light. Generally quiet conditions will prevail through the weekend and into early next week before the next storm systems affect the region by mid next week.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 4 PM PST this afternoon 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-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
WPOW1 - West Point, WA 14 mi43 min S 7 G 8 44°F 1016.2 hPa (-0.3)43°F
46120 18 mi40 min 45°F 1015.3 hPa42°F
TCMW1 - 9446482 - Tacoma Met, WA 19 mi61 min S 1.9 G 7
TCNW1 - 9446484 - Tacoma, WA 19 mi61 min 43°F 51°F1016.9 hPa
46121 30 mi36 min 1.9 43°F 1016.4 hPa43°F
46125 33 mi42 min 43°F 1015.5 hPa42°F
PTWW1 - 9444900 - Port Townsend, WA 49 mi61 min SE 5.1 G 5.1 42°F 48°F1016.5 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boeing Field - King County International Airport, WA2 mi50 minN 010.00 miMostly Cloudy43°F39°F89%1016.2 hPa
Renton Municipal Airport, WA3 mi50 minN 010.00 miOvercast43°F39°F89%1016.7 hPa
Seattle, Seattle-Tacoma International Airport, WA6 mi50 minN 010.00 miOvercast44°F39°F85%1016.7 hPa
Tacoma, Tacoma Narrows Airport, WA24 mi50 minSW 36.00 miFog/Mist41°F39°F96%1016.2 hPa

Link to 5 minute data for KBFI

Wind History from BFI (wind in knots)
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Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Sat -- 07:10 AM PST     12.23 feet High Tide
Sat -- 07:49 AM PST     Sunrise
Sat -- 10:10 AM PST     Moonset
Sat -- 12:40 PM PST     7.08 feet Low Tide
Sat -- 04:18 PM PST     Sunset
Sat -- 05:03 PM PST     10.37 feet High Tide
Sat -- 06:58 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.1-1.11.14.17.19.811.512.212119.68.27.37.17.88.99.910.4108.76.74.21.7-0.4

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
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Restoration Point
Click for Map
Sat -- 12:35 AM PST     0.01 knots Slack
Sat -- 03:13 AM PST     0.91 knots Max Flood
Sat -- 07:25 AM PST     -0.00 knots Slack
Sat -- 07:50 AM PST     Sunrise
Sat -- 10:11 AM PST     Moonset
Sat -- 10:14 AM PST     -0.62 knots Max Ebb
Sat -- 02:00 PM PST     0.00 knots Slack
Sat -- 02:52 PM PST     0.15 knots Max Flood
Sat -- 04:18 PM PST     Sunset
Sat -- 04:56 PM PST     -0.00 knots Slack
Sat -- 06:59 PM PST     Moonrise
Sat -- 09:27 PM PST     -1.07 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.30.20.70.90.90.70.40.1-0.2-0.5-0.6-0.6-0.4-0.2-00.10.1-0-0.3-0.6-0.9-1-1-0.9

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 (7,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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 numerious 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.