Wednesday, September23, 2020
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Marine Weather and Tides
Seattle, WA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:57AMSunset 7:05PM Wednesday September 23, 2020 1:01 PM PDT (20:01 UTC) Moonrise 1:51PMMoonset 10:13PM Illumination 40% Phase: Waxing Crescent; Moon at 6 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- 840 Am Pdt Wed Sep 23 2020
.small craft advisory in effect until 8 pm pdt this evening...
Today..S wind 5 to 15 kt rising to 15 to 25 kt in the afternoon. Wind waves 2 ft or less building to 2 to 4 ft in the afternoon. Rain.
Tonight..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Showers. A slight chance of tstms after midnight.
Thu..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Showers. A slight chance of tstms in the afternoon.
Thu night..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
Fri..SW wind 20 to 30 kt. Wind waves 3 to 5 ft.
Fri night..SW wind 5 to 15 kt becoming S to 10 kt after midnight. Wind waves 2 ft or less.
Sat..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 840 Am Pdt Wed Sep 23 2020
Synopsis for the northern and central washington coastal and inland waters..A vigorous frontal system will bring rain and wind to all waters Wednesday. Additional systems will follow through the rest of the week and this weekend, bringing periods of breezy winds and unsettled seas.


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 231651 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 951 AM PDT Wed Sep 23 2020

SYNOPSIS. A series of vigorous frontal systems will bring wet and windy weather at times the next several days. High pressure aloft will build over the area the first part of next week for a return to dry and warmer weather.

SHORT TERM /TODAY THROUGH FRIDAY/. The anticipated atmospheric river has arrived across the region as heavy rain continues across the Olympic Peninsula and much of the region. Latest satellite derived precipitable water in excess of 1.5 inches extends across the Pacific and into the region, well supported by the 1.42 from this morning's upper air sounding at UIL. 1-2 inches of rain already measured in the Olympics in the higher terrain. The axis of moisture and heavier rain will continue to slowly shift to the south as the day goes on. Some stronger winds through the northern inland waters and over the coastal areas, but still expect to see the winds and heavier rain to increase this afternoon and into evening across the Puget Sound region. Behind the main rain line, will still be monitoring the potential for thunderstorms this evening and tonight. Lightning is currently detected well offshore extending south from the northern portion of Vancouver Island, giving some perspective on the potential environment that may develop this evening across the western portions of the forecast area (generally over the Olympic Peninsula and into the southwestern Washington), and across much of the region on Thursday. Will continue to evaluate this threat.

Another frontal system in the westerly flow aloft approaches late Thursday and into Friday. This will bring widespread rain to the region, as well as locally windy conditions across the area early Friday.

Cullen

LONG TERM /SATURDAY THROUGH TUESDAY/. Previous discussion. Additional frontal waves in the westerly flow aloft will keep conditions wet and windy at times Saturday and Sunday. An upper ridge will rapidly build over the area Monday and Tuesday which will dry things out. A thermal trough will develop just off the coast for offshore flow by Tuesday which will allow highs to warm back into the 70s. Schneider

AVIATION. An early Fall storm system will bring widespread rain to the terminals through the TAF period. As the rain continues to spread east through the morning, expect all terminals to be affected, with ceilings dropping to at least MVFR (perhaps IFR at times), through the day today with little recovery. IFR visibility will also be possible within areas of heavier rain. Rain will eventually taper to showers overnight tonight into Thursday. Winds will noticeably pick up today out of the south, sustained generally between 10 to 20 mph with gusts 20 to 30 mph (could be locally higher at a few sites). Winds will ease late Wednesday night into Thursday.

KSEA. VFR through the early morning hours, dropping to MVFR as rain moves into the area this morning. Rain showers will continue to fill in through the day. Winds south sustained 10-20 mph with gusts around 25 mph beginning late this morning.

Kovacik/Kristell

MARINE. A series of robust frontal systems will affect the waters over the next several days. Latest sfc analysis this morning reveals a frontal system over the offshore waters of the WA Coast. A widespread area of rain was noted out ahead of the warm front, pushing inland across the Olympic Peninsula this morning. Rain will continue east through most of the day, with winds also picking up as front progresses inland. Current headlines remain in place with Gale Force winds expected over the Coastal Waters/Western Strait of Juan de Fuca and the Northern Inland Waters/Eastern Strait of Juan de Fuca, and Admiralty Inlet. Elsewhere, Small craft Advisory level winds are expected. Winds will gradually ease through the overnight hours into Thursday as the front passes, however, shower activity will persist.

Waves will increase over the Coastal Waters with the frontal system today, generally to between 10-12 feet. A more significant swell is likely on Thursday with waves building to between 14-16 feet. If this trend continues, a High Surf Advisory may be needed. Waves may continue into Friday before finally subsiding.

Additional frontal systems will affect the waters through the remainder of the week and through much of the weekend. Periods of elevated winds and agitated seas can be expected.

Kovacik/Kristell

HYDROLOGY. The anticipated atmospheric river has arrived, with 1-2 inches of rain in the Olympics and northern coastal areas today. Expect another few inches today in the high terrain and closer to 1 inch in the lower elevations as this moisture plume continues, with the focus shifting south into the evening. Sharp rises are anticipated on several rivers and streams flowing from the southern Olympics (including the Skokomish) and portions of the Cascades. While rivers should recede a bit Thursday as steady rain transitions to showers, additional heavy rainfall Friday and Saturday could bring additional rises to rivers - particularly those draining from the northern Olympics and North Cascades, though possibly elsewhere, too. Cullen

SEW WATCHES/WARNINGS/ADVISORIES. WA . Wind Advisory until 5 PM PDT this afternoon for Central Coast- North Coast.

PZ . Gale Warning until 6 PM PDT this evening for Admiralty Inlet- 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-Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory until 11 PM PDT Thursday for Grays Harbor Bar.

Small Craft Advisory until 6 PM PDT this evening for Central U.S. Waters Strait Of Juan De Fuca-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 8 PM PDT this evening 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 mi62 min S 17 G 18 59°F 1008 hPa (-0.9)58°F
46120 6 mi24 min SSE 9.7 62°F 1006.6 hPa58°F
46125 19 mi24 min 59°F 1005.8 hPa58°F
TCMW1 - 9446482 - Tacoma Met, WA 28 mi44 min SE 13 G 17
TCNW1 - 9446484 - Tacoma, WA 29 mi44 min 63°F 56°F1008.5 hPa
46121 32 mi26 min 5.8 62°F 1007.1 hPa59°F
PTWW1 - 9444900 - Port Townsend, WA 35 mi44 min E 2.9 G 8 59°F 52°F1007.2 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 mi69 minSE 122.50 miRain Fog/Mist62°F60°F93%1008.4 hPa
Renton Municipal Airport, WA16 mi69 minVar 45.00 miLight Rain Fog/Mist61°F57°F87%1009.2 hPa
Everett Snohomish County, WA17 mi69 minSSE 14 G 219.00 miLight Rain61°F57°F87%1008.5 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi69 minSE 105.00 miLight Rain Fog/Mist62°F59°F90%1009.3 hPa
Bremerton, Bremerton National Airport, WA24 mi66 minS 10 G 166.00 miLight Rain Fog/Mist60°F59°F96%1008.5 hPa

Link to 5 minute data for KBFI

Wind History from BFI (wind in knots)
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Last 24hrSW86S6SW4S4SW3S4CalmCalmSE3E5SE4SE7S83SE9SE10SE6SE7SE10S8S9SE12S9
1 day agoCalmS7SE7S7S6S5S4SW4S4CalmSW3CalmNW3CalmCalmCalmCalmSW3W3SW4SW656SE10
G15
2 days ago43NW5W5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3S3SE5S3NW333NW5

Tide / Current Tables for Meadow Point, Shilshole Bay, Washington
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Meadow Point
Click for Map
Wed -- 04:03 AM PDT     -0.57 feet Low Tide
Wed -- 06:58 AM PDT     Sunrise
Wed -- 11:27 AM PDT     10.15 feet High Tide
Wed -- 02:50 PM PDT     Moonrise
Wed -- 04:32 PM PDT     6.47 feet Low Tide
Wed -- 06:56 PM PDT     First Quarter
Wed -- 07:04 PM PDT     Sunset
Wed -- 09:49 PM PDT     9.89 feet High Tide
Wed -- 11:12 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.64.21.80.1-0.6-0.11.43.45.77.89.310.110.19.48.37.36.66.57.17.98.99.79.99.3

Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Wed -- 12:37 AM PDT     -0.67 knots Max Ebb
Wed -- 04:31 AM PDT     0.00 knots Slack
Wed -- 06:58 AM PDT     Sunrise
Wed -- 07:27 AM PDT     0.68 knots Max Flood
Wed -- 11:21 AM PDT     -0.00 knots Slack
Wed -- 01:55 PM PDT     -0.35 knots Max Ebb
Wed -- 02:50 PM PDT     Moonrise
Wed -- 05:31 PM PDT     0.00 knots Slack
Wed -- 06:56 PM PDT     First Quarter
Wed -- 07:04 PM PDT     Sunset
Wed -- 07:13 PM PDT     0.19 knots Max Flood
Wed -- 09:30 PM PDT     -0.00 knots Slack
Wed -- 11:13 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.7-0.6-0.4-0.10.20.50.70.70.50.30.1-0.1-0.3-0.3-0.3-0.2-0.10.10.20.20.1-0.1-0.3

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Seattle/Tacoma, WA
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