Tuesday, September22, 2020
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Marine Weather and Tides
Lynden, 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 6:55AMSunset 7:11PM Monday September 21, 2020 10:20 PM PDT (05:20 UTC) Moonrise 11:28AMMoonset 8:41PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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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PZZ133 Northern Inland Waters Including The San Juan Islands- 839 Pm Pdt Mon Sep 21 2020
.gale watch in effect from late Tuesday night through Wednesday afternoon...
Tonight..S wind 5 to 15 kt. Wind waves 2 ft or less. A chance of showers.
Tue..S wind 5 to 15 kt easing to 10 kt in the afternoon. Wind waves 2 ft or less. A chance of showers.
Tue night..S wind to 10 kt becoming se 25 to 35 kt after midnight. Wind waves 1 ft or less building to 4 to 6 ft after midnight. A slight chance of showers in the evening then showers likely after midnight.
Wed..SE wind 25 to 35 kt. Wind waves 4 to 6 ft.
Wed night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Thu..S wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..S wind to 10 kt. Wind waves 1 ft or less.
Fri..S wind to 10 kt. Wind waves 1 ft or less.
Sat..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 839 Pm Pdt Mon Sep 21 2020
Synopsis for the northern and central washington coastal and inland waters..Light onshore flow will continue today. A stronger cold front will reach the area Tuesday night into Wednesday. Onshore flow will continue into the end of the week as a series of systems affect the area.


7 Day Forecast for Marine Location Near Lynden, WA
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location: 48.94, -122.45     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 220336 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 836 PM PDT Mon Sep 21 2020

UPDATE. Isolated showers continue across parts of Western Washington tonight - mainly in the Olympic Peninsula as a weak upper level disturbance moves through the area. The current forecast remains on track this evening with no changes planned.

Pullin

PREV DISCUSSION. /issued 435 PM PDT Mon Sep 21 2020/

SYNOPSIS . Weak upper level trough offshore will move through Western Washington tonight. A warm front will clip the area Tuesday. Strong front in store for the first full day of fall with additional systems into Saturday. An upper level ridge will try to build over the Pacific Northwest Sunday.

SHORT TERM /TONIGHT THROUGH THURSDAY/ . Broken mid-layer cloud deck remains across the interior portions of the forecast area this afternoon, with a trough providing the focus for some showers along the coast and into the western Strait of Juan de Fuca and over the Olympic Peninsula. These showers will push inland, but likely remain generally light this evening. Focus then turns to the next system taking shape: a deep low in the Gulf of Alaska. Expect to see the leading warm front lift north across northwestern portion of the forecast area by late Tuesday afternoon bringing some light rain. For most, though, bigger impact on Tuesday will be the increasing clouds starting to approach the region.

The cold front and associated precipitation is expected to reach the coastline late Tuesday night into the pre-dawn hours Wednesday. Forecast guidance remains in fairly good agreement that southerly winds will increase, with gusts to around 40 mph along the coastal areas and increasingly breezy conditions through the interior. There remains some potential for stronger winds along the coast that would push gusts closer to 50 mph and a wind advisory may be needed for the coastal areas. Beyond the wind, periods of heavy rain are expected as the system taps into a plume of deep moisture. While rises are expected on area rivers, river flooding is not expected at this time. However, given the high rainfall rates expected, there could be some urban flooding issues that could be enhanced by storm drains that are blocked by fallen tree leaves or other debris. It would be good to ensure that these spaces are cleared ahead of the rain to help mitigate these issues. Depending on how fast the front moves through, there might be a small window for instability to increase late Wednesday.

However, continuing showers on Thursday in the moist unstable flow will lead to additional rainfall. With the colder air aloft moving over the region, expect to see steepening lapse rates and increased instability, which could provide for a few isolated thunderstorms during the afternoon and evening hours on Thursday. As a result, have introduced a slight chance mention of thunderstorms area-wide for Thursday. Will refine this in the coming days as we move into the time window of higher-res guidance. Cullen

LONG TERM /FRIDAY THROUGH MONDAY/ . Another disturbance will likely cross the region on Friday, providing for another focus of precipitation across much of the forecast area. While some showers will likely linger into Saturday, ensembles suggest that heights should begin to rise. However, there is some uncertainty as some guidance suggests the flow may be flat enough to allow another impulse to move across the region. Thus, some mention of precip chances continue into Sunday. Regardless, warming and drying seems to take hold by Monday.

AVIATION . Southwest flow aloft will continue through the rest of this afternoon and begin to change to more westerly as a low pressure system approaches the area going into Tuesday. As that system moves into Western Washington on Wednesday upper level winds will return to that southwesterly direction. Winds at the surface are expected to be 4-7 knots this afternoon, with slightly higher speeds at locations near the coast such as KHQM. Over the night time hours winds will go down to light and variable. With that expect some areas of patchy fog, especially along the coast and at lower elevation locations. There is a chance of some light scattered rain for the rest of today and into tomorrow. With fog and some possible light rain visibility is expected to decrease, possibly less than 2 SM in some locations. Ceilings will also be lowering, resulting in IFR/LIFR conditions by the early morning hours. Looking ahead to Wednesday, heavy rain and winds are expected and will likely have impacts at all terminals in Western Washington. This is expected to mainly be a single day event with conditions starting to improve come Thursday.

KSEA . Any remaining low clouds this afternoon will continue to disperse, just in time for the nightly marine layer clouds to start forming. Expect conditions to be similar to last night/this morning. Winds will be decreasing and ceilings will lower to 500-1000 feet. Patchy fog is likely to be in the area. If it reaches the terminals visibility will be a concern. Overall expect the VFR conditions to transition to IFR starting tonight and into tomorrow morning.

Butwin

MARINE . Light onshore flow will continue tonight, before a strong cold front approaches the region Tuesday night. Gales remain possible for the coastal waters, the Eastern Strait of Juan de Fuca, and the Northern Inland Waters late Tuesday and into Wednesday as the front progresses through the region. Additional advisory level winds and headlines will be possible for portions of the area waters throughout the week as a series of systems progress through the region.

Seas will hover at 3-6 feet through this evening. Seas will build to 14-16 feet late week as a new swell westerly train arrives in the region. 14

HYDROLOGY . With the strong upslope conditions, 2 to 4 inches of rain are expected for the southern slopes of the Olympics and portions of the Cascades late Tuesday night through Wednesday. With rivers very low at this time of the year and the system somewhat progressive, flooding is not forecast at this time. However, expect significant rises on some rivers, especially those like the Skokomish that flow out of the southern Olympics.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Gale Watch from Tuesday evening through Wednesday morning 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 Watch from late Tuesday night through Wednesday afternoon for East Entrance U.S. Waters Strait Of Juan De Fuca- Northern Inland Waters Including The San Juan Islands.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46118 16 mi86 min W 3.9 59°F 1013.4 hPa59°F
CHYW1 - 9449424 - Cherry Point, WA 17 mi51 min 1014.9 hPa
CPMW1 17 mi51 min Calm G 0 57°F
CPNW1 17 mi51 min Calm G 0 57°F
PBFW1 - Padilla Bay Reserve, WA 33 mi51 min NNE 1 60°F 1015 hPa57°F
FRDW1 - 9449880 - Friday Harbor, WA 40 mi45 min SW 1.9 G 2.9 56°F 51°F1014.6 hPa
SISW1 - Smith Island, WA 47 mi31 min S 8 G 12

Wind History for Cherry Point South Dock, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bellingham, Bellingham International Airport, WA11 mi28 minN 010.00 miA Few Clouds58°F54°F87%1015 hPa

Link to 5 minute data for KBLI

Wind History from BLI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW46SW6SW4W4SW5S3CalmCalmCalm
1 day agoS7S7S7S9S6S5S5S6S6S5S6S7S6S7S7S74SW5SW33CalmCalmCalmCalm
2 days agoS6S65S11
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S8S11S8S7S5S6S8S9S10S9S9S7S7S7S8S6S7S6--S7

Tide / Current Tables for Bellingham, Washington
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Bellingham
Click for Map
Tue -- 03:23 AM PDT     -0.16 feet Low Tide
Tue -- 06:57 AM PDT     Sunrise
Tue -- 10:46 AM PDT     7.13 feet High Tide
Tue -- 01:45 PM PDT     Moonrise
Tue -- 03:32 PM PDT     5.76 feet Low Tide
Tue -- 07:06 PM PDT     Sunset
Tue -- 08:32 PM PDT     7.93 feet High Tide
Tue -- 10:20 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.41.70.5-0.1-00.82.13.75.26.477.16.96.56.15.85.86.16.77.47.97.97.36.1

Tide / Current Tables for Clark Island, 1.6 mile North of, Washington Current
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Clark Island
Click for MapFlood direction 335 true
Ebb direction 150 true

Tue -- 12:39 AM PDT     -1.77 knots Max Ebb
Tue -- 05:27 AM PDT     0.00 knots Slack
Tue -- 06:58 AM PDT     Sunrise
Tue -- 08:24 AM PDT     1.13 knots Max Flood
Tue -- 11:22 AM PDT     -0.00 knots Slack
Tue -- 01:35 PM PDT     -0.72 knots Max Ebb
Tue -- 01:46 PM PDT     Moonrise
Tue -- 05:29 PM PDT     0.00 knots Slack
Tue -- 07:07 PM PDT     Sunset
Tue -- 08:12 PM PDT     0.63 knots Max Flood
Tue -- 09:38 PM PDT     -0.00 knots Slack
Tue -- 10:21 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.7-1.8-1.6-1.2-0.7-0.20.30.81.110.70.2-0.3-0.7-0.7-0.6-0.4-0.10.10.40.60.4-0.2-0.8

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
Ground Weather Radar Station Seattle/Tacoma, WA
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