Friday, January17, 2020
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Marine Weather and Tides
Normandy Park, 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 7:48AMSunset 4:49PM Friday January 17, 2020 6:12 AM PST (14:12 UTC) Moonrise 12:22AMMoonset 11:52AM Illumination 52% Phase: Third Quarter Moon; Moon at 22 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- 252 Am Pst Fri Jan 17 2020
.small craft advisory in effect from this evening through Saturday afternoon...
Today..S wind 5 to 15 kt. Wind waves 2 ft or less. A chance of showers.
Tonight..SE wind 10 to 20 kt rising to 20 to 30 kt after midnight. Wind waves 1 to 3 ft building to 3 to 5 ft after midnight. A chance of rain in the evening then rain after midnight.
Sat..S wind 20 to 30 kt. Wind waves 3 to 5 ft. Rain.
Sat night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sun..S wind 10 to 20 kt becoming se 5 to 15 kt in the afternoon. Wind waves 1 to 3 ft.
Sun night..Variable wind 5 to 15 kt becoming N after midnight. Wind waves 2 ft or less.
Mon..S wind 5 to 15 kt becoming se. Wind waves 2 ft or less.
Tue..SE wind 5 to 15 kt becoming light. Wind waves 2 ft or less.
PZZ100 252 Am Pst Fri Jan 17 2020
Synopsis for the northern and central washington coastal and inland waters..A strong frontal system will move through the area tonight and Saturday bringing another round of gales to most area waters. East to southeast flow will linger into early next week with low pressure offshore.


7 Day Forecast for Marine Location Near Normandy Park, WA
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location: 47.4, -122.35     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 171029 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 229 AM PST Fri Jan 17 2020

SYNOPSIS. Active weather will continue over the next week. The next system will arrive late tonight with lowland rain and mountain snow. Cold air trapped in Whatcom county could hang on long enough for the precipitation to start as snow. A more typical January pattern with periods of lowland rain and mountain snow will continue well into next week.

SHORT TERM /TODAY THROUGH SUNDAY/. Upper trough axis moving onshore over Western Washington early this morning with a few snow showers. The showers should dissipate later this morning as weak shortwave ridging moves over the area in advance of the next approaching frontal system. High and mid level clouds will be increasing across the area by later this morning, but steady rain with the next system should generally hold off until late afternoon along the coast. The rain will spread inland across the interior tonight. Stubborn cold air remains entrenched over Western Whatcom and this could lead to the precipitation briefly starting as snow before southeast winds arrive to boost temperatures.

As the surface low associated with this system lifts northeastward across the offshore waters late tonight, it should tighten the gradient for windy conditions with southeast exposure in the North Interior, Admiralty Inlet, and the San Juans. The high wind watch has been converted to a windy advisory for those area where gusts of 40 to 50 mph are possible. A winter storm watch remains in effect for the Olympics and Cascades tonight and Saturday where 8 to 12 inches of snow could fall at the passes with higher amounts in upper elevations. The front will dissipate over Western Washington midday Saturday with showers gradually decreasing as weak upper ridging builds south of the region.

The ridge gains amplitude as it builds east of the Cascades and a warm front brushes Western Washington on Sunday. This will give temperatures a further boost with some spots breaking into the lower 50s. The building ridge to our east on Sunday slows the forward progression of the next approaching system and may well give areas east of the Olympic Peninsula a short breather from precipitation for much of Sunday into Sunday night.

LONG TERM /MONDAY THROUGH THURSDAY/. Another frontal system arrives on Monday, but loses steam as it bumps up against the ridge over the Intermountain West. This should generally produce only light amounts of precipitation over Western Washington. A potentially more potent system looks to arrive in the Monday night or Tuesday time frame. Operational runs of both the GFS and Euro as well as their ensembles continue to lend low confidence in the forecast details with respect to timing and strength of additional systems Wednesday and beyond. 27

AVIATION. Northwesterly flow aloft this morning becoming more westerly by this afternoon as a frontal system approaches the area. Air mass stable as weak upper level ridge quickly passes through W WA this morning and afternoon in advance of aforementioned front.

Cigs over the area this early AM are generally VFR to MVFR for most of the area . the exceptions being the usually fog prone areas within the SW interior and some low cigs being reported at Port Townsend Incoming ridge is anything but clean. with plenty of lingering moisture around As such. these VFR to MVFR conditions likely to remain in place . although some periods of brief improvement will certainly be possible throughout the morning hours. Mid and high level clouds this afternoon with cigs around 5000 ft ahead of the front arriving this evening. Current models suggest cigs with the front generally being VFR but would not rule out precip bringing periods of MVFR conditions Of course. terminals more prone to lower cigs will likely dip down into IFR during this time.

KSEA . MVFR conditions in place . but some hints in both obs and satellite trends that improvement to VFR might be possible by mid- morning Prev discussion suggested possibility of snow showers. but looking at current trends . now leaning toward PoPs below TEMPO criteria and may merit removing in 12Z TAF issuance. Mid and high level clouds this afternoon with ceilings lowering this evening. Southerly winds 5-10 kts becoming light southeasterly this afternoon and evening. 18

MARINE. A strong frontal system will move through the area Friday night and Saturday bringing the potential for another round of gales to most area waters. Models have remained consistent with this over the past 24 hours . so will go ahead and upgrade the current gale watch into a gale warning for most waters with the morning forecast package. The only waters not meeting gale criteria . Puget Sound . does look to meet SCA criteria . and as such have that headline in place as well. Rough bar conditions look to set up for Saturday . but will leave that for next shift to consider. East to southeast flow will linger into early next week with low pressure offshore. 18

HYDROLOGY. An organized frontal system will affect the Olympic Peninsula Friday night and much of Saturday. With estimated rainfall totals between 2 and 3 inches, rivers in the area are expected to rise, particularly the Skokomish. The snow level will be marginal for flooding as it will start very low but rise as high as 4000 feet by the end of the storm. Depending on the rainfall total, increase in snow level, and potential melting of low elevation snow in the valleys, minor flooding is possible on the Skokomish. Continue to monitor the latest forecast information as the details of the event evolve.

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Storm Watch from this evening through Saturday afternoon for Cascades of Pierce and Lewis Counties-Cascades of Snohomish and King Counties-Cascades of Whatcom and Skagit Counties-Olympics.

Wind Advisory from 10 PM this evening to 10 AM PST Saturday for Admiralty Inlet Area-San Juan County-Western Skagit County- Western Whatcom County.

PZ . Small Craft Advisory from 6 AM this morning to 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.

Gale Warning from 4 PM this afternoon to 10 AM 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.

Gale Warning from 10 PM this evening to 1 PM PST Saturday for Admiralty Inlet-Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 10 PM this evening to 4 PM PST Saturday 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
TCMW1 - 9446482 - Tacoma Met, WA 9 mi54 min SE 4.1 G 5.1
TCNW1 - 9446484 - Tacoma, WA 10 mi60 min 34°F 48°F1018.4 hPa
WPOW1 - West Point, WA 19 mi72 min W 6 G 7 36°F 1017.7 hPa (+3.4)34°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, WA3 mi19 minSE 610.00 miMostly Cloudy34°F30°F85%1018.5 hPa
Boeing Field - King County International Airport, WA9 mi19 minSSE 510.00 miPartly Cloudy32°F28°F88%1018.1 hPa
Renton Municipal Airport, WA10 mi19 minS 310.00 miFair31°F28°F92%1018.6 hPa
Tacoma, Tacoma Narrows Airport, WA15 mi19 minN 08.00 miPartly Cloudy33°F30°F92%1018 hPa
Tacoma / McChord Air Force Base, WA18 mi74 minN 06.00 miLight Showers Snow Fog/Mist31°F30°F100%1017.9 hPa
Pierce County-Thun Field, WA21 mi37 minN 010.00 miOvercast30°F30°F100%1017.3 hPa
Bremerton, Bremerton National Airport, WA23 mi16 minW 30.50 miFreezing Fog31°F30°F96%1018.5 hPa

Link to 5 minute data for KSEA

Wind History from SEA (wind in knots)
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Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Fri -- 12:22 AM PST     Moonrise
Fri -- 03:27 AM PST     3.04 feet Low Tide
Fri -- 05:00 AM PST     Last Quarter
Fri -- 07:50 AM PST     Sunrise
Fri -- 10:10 AM PST     13.04 feet High Tide
Fri -- 11:51 AM PST     Moonset
Fri -- 04:47 PM PST     Sunset
Fri -- 05:08 PM PST     2.40 feet Low Tide
Fri -- 11:15 PM PST     8.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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75.543.23.24.36.28.410.612.31312.711.49.474.73.12.42.73.85.478.28.8

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Fri -- 12:23 AM PST     Moonrise
Fri -- 12:48 AM PST     0.01 knots Slack
Fri -- 03:54 AM PST     1.76 knots Max Flood
Fri -- 05:00 AM PST     Last Quarter
Fri -- 07:36 AM PST     -0.06 knots Slack
Fri -- 07:51 AM PST     Sunrise
Fri -- 10:45 AM PST     -1.45 knots Max Ebb
Fri -- 11:52 AM PST     Moonset
Fri -- 02:04 PM PST     0.00 knots Slack
Fri -- 04:36 PM PST     1.60 knots Max Flood
Fri -- 04:49 PM PST     Sunset
Fri -- 08:23 PM PST     -0.03 knots Slack
Fri -- 11:08 PM PST     -1.25 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.90.41.21.61.81.61.30.7-0.7-1.2-1.4-1.4-1.3-1-0.31.11.51.61.41.10.5-0.7-1.1-1.2

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 (9,2,3,4)
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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.