Wednesday, March3, 2021
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Marine Weather and Tides
Port Townsend, WA

Version 3.4
NOTICE
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 6:45AMSunset 5:59PM Wednesday March 3, 2021 3:03 AM PST (11:03 UTC) Moonrise 11:55PMMoonset 9:07AM Illumination 77% Phase: Waning Gibbous; Moon at 19 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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PZZ134 Admiralty Inlet- 258 Am Pst Wed Mar 3 2021
.small craft advisory in effect from Thursday morning through late Thursday night...
Today..SE wind 5 to 15 kt. Wind waves 2 ft or less.
Tonight..W wind to 10 kt becoming variable after midnight. Wind waves 2 ft or less.
Thu..SE wind 15 to 25 kt. Wind waves 2 to 4 ft. A chance of rain in the afternoon.
Thu night..SE wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri..SE wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri night..S wind 10 to 20 kt rising to 15 to 25 kt after midnight. Wind waves 2 to 4 ft.
Sat..S wind 10 to 20 kt becoming 5 to 15 kt. Wind waves 1 to 3 ft.
Sun..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 258 Am Pst Wed Mar 3 2021
Synopsis for the northern and central washington coastal and inland waters..Weak high pressure over the waters today. A warm front will brush the area tonight. A vigorous cold front will arrive later Thursday and slowly move through the waters Friday. A 1004 mb surface low will move onshore near cape flattery Saturday morning.


7 Day Forecast for Marine Location Near Port Townsend, WA
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location: 48.1, -122.76     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 030355 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 753 PM PST Tue Mar 2 2021

SYNOPSIS. Mostly dry and warmer conditions across the region through Thursday as quasi-zonal flow gives way to high pressure aloft. A pattern change late Thursday will see a return of wet weather to Western Washington Friday through the first half of next week.

SHORT TERM /TONIGHT THROUGH THURSDAY/. Current satellite imagery shows a mix of mid to low level clouds persisting over much of the CWA Radar suggests a stray shower or two. mostly over the Strait and northern portions of the Olympic Peninsula. Ground obs in the CWA not showing any precip, so this will likely be pretty limited this evening and not a concern overnight. Inherited forecast looks on track and see no need for an evening update. For further forecast details, please refer to the From Previous Discussion section below. 18

From Previous Discussion . A large upper level low embedded in the southern flank of the polar jet will eject across Southern California tonight and into the Great Basin by Wednesday night/early Thursday. This, coupled with an approaching upper level low ejecting out of the Gulf of Alaska will amplify the NW to SE oriented ridge, with the ridge axis likely oriented east of Western Washington. While we are expecting warming temperatures, this will be a limiting factor in how warm we will get on Wednesday and Thursday. While 60 degrees F is not out of the question on Thursday, timing of the onset of clouds and rain will be a factor. An onset of clouds and rain earlier on Thursday will preclude warming, while clouds and rain moving into the region later in the afternoon will likely allow readings to hit the 60 degree mark for the second time this week in some areas and for the first time this year in others. With a deepening upper level low tapping into a large fetch of Pacific moisture approaching the coast Thursday night, a shift from quiet and mild weather is expected, as increasing winds along the outer coast and rain are expected to impact the region Friday through the weekend.

LONG TERM /FRIDAY THROUGH TUESDAY/. From Previous Discussion . There remains some variance in ensemble guidance regarding exactly where the bulk of the upper level energy will impact the coast. There remains a signal in the upper level ensemble guidance in a secondary upper level shortwave trough ejecting southeastward out of the parent low and into the southern OR/NorCal coast late Friday/Saturday. That said, confidence is increasing in a weak AR event setting up from southwest to northeast along the northwest coast Friday and Saturday. That said, there are several factors that will preclude widespread flooding with this particular AR setup:

1) Snow levels: These will only rise to ~4000-5000 feet at the most across the region, cutting down the rainfall efficiency.

2) Progressive storm pattern: The AR will only remain pointed at the Olympic Peninsula for roughly 24 to 36 hours before the upper low pushes the moisture eastward.

These factors will limit rainfall amounts and snowmelt runoff through this event. There is reasonable confidence in at least 1 to 2 inches of rainfall from Thursday night through Saturday, with slightly higher amounts in the Olympics. As a result, flooding potential will likely be limited to the Skokomish River basin, with lower potential for urban flooding due to less intense rainfall rates. Aside from rain, breezy southerly winds are expected along the coast through Friday evening.

Active weather will persist through the remainder of the period as another system will eject out of the Gulf of Alaska on Sunday, bringing another round of wet and active weather to the region through the end of the period. It is important to note that there is a wide range of solutions regarding the strength and location of this system which will affect the finer details of the resultant weather. The bottom line is, expect unsettled weather to persist from this weekend through at least the first half of next week.

Pullin

AVIATION. Westerly flow aloft remains in place tonight and into Wednesday before turning southwesterly in the afternoon. Light low- level flow will become southerly on Wed. The air mass is stable and fairly moist. VFR conditions in place area-wide although cigs may dip down into MVFR range for those locations more prone to such conditions /OLM, HQM/.

KSEA . Dry conditions with VFR conditions expected. Cigs should lower down to around 4000 ft tonight and remain there during the overnight and into Wednesday morning. Clouds expected to scatter out Wednesday afternoon. 18

MARINE. Weak high pressure builds over the area but a warm front will brush the area later on Wednesday. A stronger front will arrive Thursday or Friday with southerly gales possible across the coastal waters and portions of the inland waters. Coastal swell will ease a bit but then build right back up again for the end of the week. No changes needed for evening forecast package.

19/18

HYDROLOGY. From Previous Discussion . An atmospheric river is expected to affect Western Washington late Thursday night through Saturday. At this time, several limiting factors will keep the flood threat isolated to the Skokomish River basin during this timeframe.

1) Snow levels will only rise to 4000 to 5000 feet across the Olympic Peninsula, limiting rainfall efficiency.

2) Event duration. The AR will remain pointed at the Olympic Peninsula for ~24-36 hours at the most. Rainfall amounts will generally range from 1 to 2 inches across most locations, with higher amounts to 3 inches in the higher elevations of the Olympics.

These factors coupled with a mostly dry week will limit the flooding potential across the region. An additional system will bring additional rainfall to Western Washington Sunday through early next week.

Pullin

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 10 PM PST this evening 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.

Small Craft Advisory until 8 AM PST Wednesday for Grays Harbor Bar.



www.weather.gov/seattle


Weather Reporting Stations
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Wind History for Port Townsend, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Whidbey Island Naval Air Station - Ault Field, WA19 mi2.1 hrsSE 310.00 miOvercast40°F34°F79%1014.1 hPa

Link to 5 minute data for KNUW

Wind History from NUW (wind in knots)
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Last 24hrW12W13W13W11W9W11W9W6W6W6SW4SW5W4SW4SW4W6W4W4CalmCalmCalmCalmSE3Calm
1 day agoSE8SE8SE6SE9SE7SE5E7SE8CalmSE5SE9W6NW3CalmS3W4CalmSW7SW8W8W12W11W12
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Tide / Current Tables for Port Townsend, Washington (2) (expired 1991-12-31)
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Port Townsend
Click for Map
Wed -- 12:15 AM PST     2.56 feet Low Tide
Wed -- 06:47 AM PST     Sunrise
Wed -- 07:01 AM PST     9.05 feet High Tide
Wed -- 09:06 AM PST     Moonset
Wed -- 01:14 PM PST     1.20 feet Low Tide
Wed -- 05:58 PM PST     Sunset
Wed -- 08:07 PM PST     7.13 feet High Tide
Wed -- 11:55 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.62.83.64.86.27.68.698.67.35.33.31.91.21.42.23.44.65.86.77.16.96.15.1

Tide / Current Tables for Port Townsend, 0.5 miles S of Point Hudson, Washington Current
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Port Townsend
Click for MapFlood direction 115 true
Ebb direction 10 true

Wed -- 02:23 AM PST     1.57 knots Max Flood
Wed -- 04:55 AM PST     -0.01 knots Slack
Wed -- 06:47 AM PST     Sunrise
Wed -- 08:56 AM PST     -0.69 knots Max Ebb
Wed -- 09:06 AM PST     Moonset
Wed -- 11:45 AM PST     0.00 knots Slack
Wed -- 03:15 PM PST     1.64 knots Max Flood
Wed -- 05:58 PM PST     Sunset
Wed -- 06:04 PM PST     -0.00 knots Slack
Wed -- 09:27 PM PST     -0.44 knots Max Ebb
Wed -- 11:48 PM PST     0.00 knots Slack
Wed -- 11:54 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.31.51.50.9-0-0.3-0.5-0.6-0.7-0.6-0.30.20.91.41.61.50.90.1-0.2-0.3-0.4-0.4-0.2

Weather Map
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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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