Saturday, October16, 2021
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Marine Weather and Tides
Seattle, WA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:27AMSunset 6:22PM Friday October 15, 2021 9:04 PM PDT (04:04 UTC) Moonrise 4:00PMMoonset 12:38AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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- 807 Pm Pdt Fri Oct 15 2021
.small craft advisory in effect through Saturday morning...
Tonight..S wind 15 to 25 kt. Wind waves 2 to 4 ft. A chance of rain.
Sat..S wind 15 to 25 kt. Wind waves 2 to 4 ft. A slight chance of rain.
Sat night..S wind to 10 kt. Wind waves 1 ft or less. A slight chance of rain in the evening then a chance of rain after midnight.
Sun..S wind to 10 kt. Wind waves 1 ft or less.
Sun night..S wind to 10 kt becoming sw after midnight. Wind waves 1 ft or less.
Mon..S wind to 10 kt in the morning becoming light. Wind waves 1 ft or less in the morning becoming less than 1 ft.
Mon night..Light wind becoming S to 10 kt after midnight. Wind waves less than 1 ft becoming 1 ft or less after midnight.
Tue..SW wind to 10 kt becoming variable. Wind waves 1 ft or less.
Wed..SW wind to 10 kt becoming se. Wind waves 1 ft or less.
PZZ100 807 Pm Pdt Fri Oct 15 2021
Synopsis for the northern and central washington coastal and inland waters..A slow moving frontal system over the northern coastal waters today will move slowly ashore over the weekend. Weak high pressure will shift over the region on Monday.


7 Day Forecast for Marine Location Near Seattle, WA
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location: 47.68, -122.41     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 160332 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 832 PM PDT Fri Oct 15 2021

UPDATE. The main area of precipitation this evening is over the central and northern coast, and northern interior areas. Steady rain for these areas through tonight with potentially drier weather Saturday afternoon for most areas with continued rain along the north coast. Temperatures Saturday in the 60s for most across the area.

SYNOPSIS. Deep Pacific moisture coupled with a stationary cold front just offshore will bring continued rainfall to the northern half of the area into Saturday. This front will start to work its way inland late Saturday and into Sunday allowing for more widespread precipitation and locally breezy conditions. A brief break for dry weather Monday before more active weather resumes for much of the week.

SHORT TERM /TONIGHT THROUGH MONDAY/. Northern portions of the CWA still seeing rainfall as per latest radar imagery with not much variation on where the rain is falling, still generally north of a line running from northern Grays Harbor county to the King/Snohomish county border. Southern portions remain dry thanks to upper level ridging just south of the area. Not much in the way of change is expected tonight and during the overnight period as the AR remains pointed north of the area, primarily focused on western British Columbia.

Pre-frontal winds will pick up over the area Saturday, mainly impacting the usual spots prone to higher wind speeds /coast and north interior/. Forecast remains on track that wind speeds here will remain below advisory criteria, so breezy to locally windy wording should be just fine. In terms of weather, not much change expected between Friday and Saturday, with rain continuing over the northern half of the CWA while the southern half will remain generally dry.

A strengthening upper level ridge over the Great Plains will reorient the AR to run parallel with the cold front along the coast, severing it from its source of tropical moisture. This front will move inland starting late Saturday night and it will spend of the bulk of Sunday slowly plodding eastward. Current model solutions have slowed the feature down, turning it into an all day thing before gradually tapering off Sunday evening. Snow levels during this event expected to remain high . above 6000 ft . so not expecting much in the way of snow in the mountains as the front moves through.

The front should exit the area by Monday morning with an upper level ridge bringing a break in precipitation over the area and perhaps even some peeks of sun.

Afternoon high temps during this period will warm a little bit with lower to mid 60s Saturday before cooling with the front down into the mid to upper 50s Sunday and Monday. 18

LONG TERM /TUESDAY THROUGH FRIDAY/. While the upper level ridge exits the area by Tuesday morning, the effects linger as W WA remains on the backside keeping conditions dry through much of Tuesday. Deterministic models differ in timing as to when the next system will move in . either late Tuesday night or Wednesday morning . while ensembles seem to point more toward the latter option. Some uncertainty with how successful and how far east this system will be, depending on a continuing ridge over the Central US. NBM is leaning a little on the wetter side . which is what is present in the forecast . but given the wide variety in ensemble members, cannot say it stirs up much in the way of confidence.

It is this Central US ridge that ends up shaking confidence in the remainder of the forecast period as deterministic models and ensemble members all paint an active pattern right along the Pacific Coast . but the westward impacts of said ridge will be vital in determining whether or not any of these systems will have an impact on W WA for the second half of next week. Practically every ensemble member and each deterministic model has a different solution as to how far east precip reaches into the area. This again allows for the NBM to lean a little more on the wet side of things, however, given the high degree of uncertainty, who can say whether or not this might be accurate. At the very least, it provides future shifts with a starting point to make alterations should a consensus emerge. 18

AVIATION. Westerly flow aloft becoming southwesterly during the day on Saturday. The air mass is moist and stable with a stalled frontal boundary draped across the northwest corner of the state this evening. A mix of MVFR or occasional IFR ceilings in light rain are expected in the vicinity of the front overnight into Saturday morning. South of a KHQM-KSEA line, mainly VFR ceilings are expected to continue into Saturday. A slow moving cold front will bring deteriorating ceilings to all of Western Washington Saturday night.

KSEA . Mainly VFR conditions expected to continue into Saturday afternoon as a stalled front funnels moisture into the region well north of the terminal. A few showers will be possible overnight into Saturday morning. Surface winds southerly 6 to 11 knots. 27

MARINE. Blustery at times in the normally windier locations like the coast and northern waters as a very slow frontal system is draped over the area. This frontal system will keep southerly gradients over the areas through Saturday morning before the front finally moves ashore Saturday afternoon and evening--although westerlies behind the front probably do not arrive until Sunday. Weak high pressure finally shifts over the area on Monday. Another front should reach the area next Wednesday. 19

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 5 PM PDT Saturday for Admiralty Inlet- 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-Northern Inland Waters Including The San Juan Islands-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 10 PM PDT Saturday for Grays Harbor Bar.

Gale Warning until 5 PM PDT 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.

Small Craft Advisory until 11 AM PDT 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
WPOW1 - West Point, WA 2 mi65 min SSE 13G14 59°F 1019 hPa (-0.5)48°F
TCMW1 - 9446482 - Tacoma Met, WA 28 mi47 min S 4.1G6
TCNW1 - 9446484 - Tacoma, WA 29 mi47 min 55°F1020.1 hPa
PTWW1 - 9444900 - Port Townsend, WA 35 mi47 min ESE 5.1G9.9 58°F 51°F1017.8 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 mi72 minSSE 1110.00 miOvercast58°F47°F67%1019.3 hPa
Renton Municipal Airport, WA16 mi72 minSSW 410.00 miOvercast57°F48°F72%1019.8 hPa
Everett Snohomish County, WA17 mi72 minSSE 11 G 217.00 miLight Rain53°F49°F86%1019.4 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi72 minS 710.00 miOvercast59°F45°F60%1020.2 hPa
Bremerton, Bremerton National Airport, WA24 mi69 minS 610.00 miLight Rain55°F51°F87%1019.7 hPa

Link to 5 minute data for KBFI

Wind History from BFI (wind in knots)
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Tide / Current Tables for Meadow Point, Shilshole Bay, Washington
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Meadow Point
Click for Map
Sat -- 01:52 AM PDT     8.44 feet High Tide
Sat -- 02:52 AM PDT     Moonset
Sat -- 07:30 AM PDT     Sunrise
Sat -- 08:24 AM PDT     1.06 feet Low Tide
Sat -- 03:35 PM PDT     11.42 feet High Tide
Sat -- 05:21 PM PDT     Moonrise
Sat -- 06:18 PM PDT     Sunset
Sat -- 09:43 PM PDT     4.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Sat -- 01:35 AM PDT     -0.00 knots Slack
Sat -- 02:52 AM PDT     Moonset
Sat -- 05:14 AM PDT     -0.51 knots Max Ebb
Sat -- 07:30 AM PDT     Sunrise
Sat -- 08:47 AM PDT     0.00 knots Slack
Sat -- 11:44 AM PDT     0.66 knots Max Flood
Sat -- 03:18 PM PDT     -0.00 knots Slack
Sat -- 05:21 PM PDT     Moonrise
Sat -- 06:18 PM PDT     Sunset
Sat -- 06:21 PM PDT     -0.53 knots Max Ebb
Sat -- 10:11 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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