Tuesday, January28, 2020
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Marine Weather and Tides
Manchester, 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 7:39AMSunset 5:05PM Tuesday January 28, 2020 2:17 AM PST (10:17 UTC) Moonrise 9:52AMMoonset 9:07PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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- 846 Pm Pst Mon Jan 27 2020
Tonight..N wind 10 to 20 kt becoming S after midnight. Wind waves 1 to 3 ft. Rain in the evening then showers and a slight chance of tstms after midnight.
Tue..S wind 10 to 20 kt becoming 5 to 15 kt in the afternoon. Wind waves 1 to 3 ft. A slight chance of tstms in the morning. Showers.
Tue night..S wind 5 to 15 kt rising to 15 to 25 kt after midnight. Wind waves 2 ft or less building to 2 to 4 ft after midnight. A slight chance of showers in the evening then a chance of showers after midnight.
Wed..S wind 5 to 15 kt becoming to 10 kt in the afternoon. Wind waves 2 ft or less.
Wed night..S wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Thu..S wind to 10 kt. Wind waves 1 ft or less.
Thu night..S wind to 10 kt. Wind waves 1 ft or less.
Fri..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat..SW wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 846 Pm Pst Mon Jan 27 2020
Synopsis for the northern and central washington coastal and inland waters..A frontal system will continue to move through the coastal waters tonight, yielding gale force winds into the overnight hours. Small craft advisory winds will spread through the interior waters this evening. Conditions will relax briefly before additional systems push through later in the week. Additional headlines will be needed from mid week onward.


7 Day Forecast for Marine Location Near Manchester, WA
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location: 47.57, -122.53     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 280450 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 850 PM PST Mon Jan 27 2020

UPDATE. A strong upper level area of low pressure can be seen swirling across the offshore waters of western Washington this evening. An organized sfc frontal system is associated with it, the warm frontal portion of which is moving into western Washington this evening. Strong WAA in the 925-700 mb coupled with frontogenetic forcing has allowed for widespread rain to move into the area. Radar trends have suggested that some of this activity could be moderate to locally heavy at times. Overall impacts should be minimal, tho locally heavier areas of rain may produce some ponding on roadways. Snow is likely to continue across the Cascades overnight given widespread precip giving way to convective showers, with the Winter Weather Advisory remaining in effect for much of Tuesday morning until the front clears the area. This will likely create treacherous travel across the Passes. Avalanche concerns also remain: see the latest from the Northwest Avalanche Center at nwac.us.

Into the overnight hours, the cold front will follow the warm front, creating more a convective shower environment in the wake of the stratiform rain. Model guidance indicates mid level temps falling to near -30C as the upper level trough begins to approach western Washington. This will create an unstable environment, with mid level lapse rates steep enough to support the develop of a few thunderstorms. This threat will continue through Tuesday morning until the front moves east of the area. The main threats within any thunderstorm will be gusty winds, heavy rainfall, small hail, and lightning.

A brief lull will ensue across the area Wednesday evening and night as a brief shortwave ridge passes above. The next frontal system is on tap for Wednesday. Previous discussion follows below with an updated marine and aviation section:

Kovacik

PREV DISCUSSION. /issued 237 PM PST Mon Jan 27 2020/

SYNOPSIS. A front will move through Western Washington this evening. Additional precipitation will fall through Tuesday as the associated low pressure system weakens and moves ashore. Additional frontal systems will affect the region Wednesday through Saturday.

SHORT TERM /TONIGHT THROUGH THURSDAY/. A front will move through the area this evening. A few periods of fairly organized shower activity will follow the front tonight through Tuesday. The passes ought to pick up about a foot of snow from this system but travel probably wont be impacted a great deal since it hasn't been cold --although it will probably get slushy at Snoqualmie Pass tonight. Tuesday night will see a break in the weather, and then a couple of warmer fronts ought to reach the area Wednesday and Thursday. The low pressure centers associated with these two fronts are nowhere near Western Washington and a little breezy weather is about all we will see with these fronts.

LONG TERM /FRIDAY THROUGH MONDAY/. The frontal system slated for Friday and Saturday will be wet and mild, although the heavy rain in the 12z GFS ends up over Vancouver Island and southwest British Columbia Friday night and Saturday. The ECMWF has more rain for Western Washington with less of a tendency to lift the precip north of here--although for Friday afternoon and evening only the Olympics and North Cascades have the heavy precip. Behind that frontal system cooler drier air will arrive for Sunday and Monday. 19

AVIATION. Rain will continue across the TAF sites into the overnight hours, eventually becoming more showery around midnight or so. Ceilings as of 730 PM are mostly VFR and MVFR, and expect the general trend of MVFR to dominate most of this TAF cycle. Will have the potential for a few thunderstorms/lighting strikes across the area, mainly after midnight and through Tuesday morning. Coverage is not high enough, nor is confidence high enough, to warrant mention in the TAFs for now, but the potential will develop across most of the area. In addition to rain, thunder potential, and lowering cigs, LLWS is expected to increase overnight. Will likely add this to at least the TAF sites around Puget Sound during the 06z update-this will include KSEA. Winds will be south 8-12kts with a few gusts 20-25kts near the coast (KHQM).

KSEA . Rain will become more showery after midnight, with the potential for isolated thunder in the vicinity thru Tuesday morning. VFR cigs this evening likely to give way to dominant MVFR deck for the remainder of the cycle. LLWS is also expected through about 12z Tuesday and will be added to the 06z update. Winds S thru the period 8-12kts.

Kovacik

MARINE. Based on observations over the past few hours, winds have noticeably increased down the Strait of Juan de Fuca from the east. Have upgraded the small craft advisory to a Gale Warning through 10PM. Model guidance then indicates that gradients should weaken through the night. A frontal system responsible for these winds will continue to move through the waters tonight, keeping small craft winds at least into early Tuesday morning. A continued series of weather systems are likely to keep marine headlines in for wind through much of the week, with perhaps some brief breaks at times.

Kovacik

HYDROLOGY. With the exception of the Skokomish river, flooding is not expected through Thursday. The Skokomish will remain above flood stage through the week. A possible atmospheric river scenario could set up beginning later Thursday and continue into Saturday. This event has the potential to create another round of flooding on area rivers.

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Weather Advisory until 10 AM PST Tuesday for Cascades of Pierce and Lewis Counties-Cascades of Snohomish and King Counties-Cascades of Whatcom and Skagit Counties-Olympics.

PZ . Small Craft Advisory until 10 PM PST Tuesday for Grays Harbor Bar.

Small Craft Advisory until 10 PM PST Tuesday 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.

Gale Warning until 10 PM PST this evening for Central U.S. Waters Strait Of Juan De Fuca-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-East Entrance U.S. Waters Strait Of Juan De Fuca-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 6 AM PST Tuesday for East Entrance U.S. Waters Strait Of Juan De Fuca-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 6 AM PST Tuesday for Admiralty Inlet- Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory until midnight PST tonight for Central 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 8 mi77 min SSE 15 G 18 48°F 1010.8 hPa (-0.9)47°F
TCMW1 - 9446482 - Tacoma Met, WA 21 mi59 min SE 5.1 G 7
TCNW1 - 9446484 - Tacoma, WA 22 mi53 min 48°F 49°F1012.2 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, WA12 mi24 minSSE 1010.00 miA Few Clouds46°F43°F89%1011.4 hPa
Bremerton, Bremerton National Airport, WA14 mi21 minS 610.00 miOvercast46°F45°F96%1011.5 hPa
Seattle, Seattle-Tacoma International Airport, WA15 mi24 minSE 1310.00 miOvercast47°F45°F93%1012.1 hPa
Renton Municipal Airport, WA17 mi24 minS 510.00 miMostly Cloudy45°F42°F90%1012.2 hPa
Tacoma, Tacoma Narrows Airport, WA21 mi24 minS 710.00 miFair47°F45°F93%1011.3 hPa

Link to 5 minute data for KBFI

Wind History from BFI (wind in knots)
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2 days agoCalmSE4CalmCalmCalmCalmCalmCalmSE3SE6SE46S5S5CalmCalmCalmNE5NW34CalmNE3CalmCalm

Tide / Current Tables for Clam Bay, Rich Passage, Washington
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Clam Bay
Click for Map
Tue -- 12:39 AM PST     0.16 feet Low Tide
Tue -- 07:41 AM PST     Sunrise
Tue -- 07:49 AM PST     12.26 feet High Tide
Tue -- 09:51 AM PST     Moonrise
Tue -- 01:40 PM PST     5.60 feet Low Tide
Tue -- 05:04 PM PST     Sunset
Tue -- 06:40 PM PST     9.38 feet High Tide
Tue -- 09:07 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.21.33.35.98.510.611.912.211.610.38.56.85.85.66.27.38.49.29.38.77.45.63.7

Tide / Current Tables for Rich Passage, West end, Washington Current
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Rich Passage
Click for Map
Tue -- 12:50 AM PST     0.00 knots Slack
Tue -- 04:34 AM PST     3.57 knots Max Flood
Tue -- 07:41 AM PST     Sunrise
Tue -- 08:41 AM PST     -0.00 knots Slack
Tue -- 09:51 AM PST     Moonrise
Tue -- 11:35 AM PST     -2.78 knots Max Ebb
Tue -- 02:24 PM PST     0.00 knots Slack
Tue -- 04:42 PM PST     0.89 knots Max Flood
Tue -- 05:04 PM PST     Sunset
Tue -- 07:17 PM PST     -0.00 knots Slack
Tue -- 09:07 PM PST     Moonset
Tue -- 11:00 PM PST     -3.03 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.70.21.72.83.53.532.10.9-0.5-1.8-2.6-2.7-1.8-0.50.40.80.90.70.2-0.7-1.8-2.7-3

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 (5,6,7,8)
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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.