Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Port Townsend, WA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:01AMSunset 5:46PM Thursday February 22, 2018 2:43 AM PST (10:43 UTC) Moonrise 10:37AMMoonset 12:20AM Illumination 46% Phase: First Quarter Moon; Moon at 7 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- 211 Am Pst Thu Feb 22 2018
Today..NW wind 10 to 20 kt. Wind waves 1 to 3 ft.
Tonight..NW wind 10 to 20 kt becoming N to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less after midnight.
Fri..SE wind 10 to 20 kt rising to 20 to 30 kt in the afternoon. Wind waves 1 to 3 ft building to 3 to 5 ft in the afternoon. A chance of snow in the morning then snow likely in the afternoon.
Fri night..SE wind 10 to 20 kt becoming S to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less after midnight.
Sat..NW wind 15 to 25 kt easing to 5 to 15 kt in the afternoon. Wind waves 2 to 4 ft subsiding to 1 to 2 ft in the afternoon.
Sat night..Variable wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Sun..SW wind 15 to 25 kt easing to 10 to 20 kt. Wind waves 2 to 4 ft.
Mon..Light wind becoming se to 10 kt. Wind waves less than 1 ft becoming 1 ft or less.
PZZ100 211 Am Pst Thu Feb 22 2018
Synopsis for the northern and central washington coastal and inland waters..Moderate to strong northeasterly pressure gradients are expected today as a weak low over the far southern washington coastal waters drops southward into oregon. Winds will diminish later this afternoon and tonight as a surface ridge moves southeast across the waters. A series of increasingly strong frontal systems will give windy conditions to the waters Friday through the weekend, and gales are possible Saturday into Sunday.

7 Day Forecast for Marine Location Near Port Townsend city, WA
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location: 48.12, -122.72     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 220402
afdsew
area forecast discussion
national weather service seattle wa
802 pm pst Wed feb 21 2018

Synopsis A weak low pressure system over northwest washington
this evening will bring areas of light snow to the area. This low
will move quickly south into oregon later tonight. A break in the
weather is expected between systems on Thursday. A stronger
system will give wet weather to the area Friday into Saturday with
low snow levels. Cool northwest flow aloft will continue into the
middle of next week, with cool wet systems around Sunday and then
next Tuesday or Wednesday.

Short term Satellite imagery and area radars show a surface low
just west of hoquiam and an upper level low or vorticity maximum
just east of the hood canal bridge. The system is expected to push
rapidly southward into oregon overnight with precipitation rapidly
ending from the north between 10 pm and 1 am. The forecast
challenge of the evening is snowfall amounts as the system quickly
moves and its structure evolves. One area of interest extends from
around everett and arlington westward to port townsend and the
hood canal bridge. A report on social media indicated that 3
inches fell in sequim as this feature passed that area earlier.

How far east will this area extend as it pushes south and will it
maintain its structure? At this point it appears that this area
has diminished somewhat over the past hour. With the exception to
an isolated location around everett or mukilteo, it appears that
snowfall totals east of the sound will remain below one inch while
portions of the kitsap peninsula (especially north) will see 1-3
inches. Farther north, snowfall over the san juans and around
bellingham is rapidly ending from the north. Another area of
interest is from around shelton and olympia westward through the
chehalis gap to southeast of hoquiam and into the willapa hills.

Showers moving southeast along the coast appear rather heavy on
radar. A quick 2-3 inches can fall from these heavier showers.

Winter weather advisories are in effect for the lowlands of the
olympic peninsula, the interior from olympia southward, and the
lowlands west of the sound. The first advisory to expire is on
the north coast where showers are coming to an end. We will likely
be able to cancel advisories a bit before the stated expiration
time from north to south as snow comes to an end overnight.

Albrecht
from the previous short term discussion: upper heights will rise
nicely on Thu morning, and dry northeast flow aloft will quickly
clear out skies in the am. A sunny Thu afternoon is expected,
though the air mass will still be cool. Shortwave ridge axis will
move southeast past the forecast Thu night.

Northwest flow aloft will bring another shortwave down the b.C.

Coast on Friday pm, with the height fall center passing turning
east-southeast near vancouver b.C. On Fri evening. A slowly
intensifying 1012 mb surface low will pass across the far north
cascades late Friday night. To its south, a turn to onshore flow
with southerly gradients will bring a good shot of warm advection
and lift on Friday afternoon and evening. With a cold air mass to
begin, most lowland locales will start as snow. The coast should
quickly change to rain soon after precip onset. Away from the
coast, the transition to rain is more likely to occur Friday
evening after starting with 1-3 inches of snow during the
afternoon. A trailing cold front will move across on Sat morning,
with a few post-frontal rain and snow showers continuing. With a
cooling air mass behind the front on sat, some more localized
accumulations are possible, especially where there is a focus for
lift such as in a puget sound convergence zone. On a larger scale,
weather should be drying out over the course of Saturday. Haner

Long term From the previous long term discussion: northwest
flow pattern will continue. Another system is expected Sunday. Air
mass will not be as cold to start with, so precip will come in
the form of rain over the majority of the lowlands. However, some
post-frontal snow showers are possible on Sunday night. Next
similar system expected late Tuesday or next Wednesday. Haner

Aviation A weak upper level low is sliding southward through
western washington. Light northwest flow aloft will become
stronger north flow late tonight into Thursday night as the upper
low moves well southward and is replaced by a weak short wave
upper ridge. At the surface, a weak low is moving southward along
the washington coast this evening. Low-level northeast flow will
increase somewhat late tonight into Thursday as the low moves off
to the south. Then the low level flow will decrease later
Thursday.

The upper low is bringing MVFR to ifr conditions in light snow and
ceilings to the area. Conditions are expected to rapidly improve
toVFR from the north late tonight into early Thursday morning.

Snowfall totals tonight will range from one to three inches at
terminals on the olympic peninsula, while terminals east of puget
sound will generally see less than an inch. Albrecht
ksea... Snow showers will continue to give low end MVFR to
occasional ifr conditions to the terminal through about 08z.

Conditions will improve to MVFR as precipitation comes to an end
after 08z then conditions will rapidly clear with goodVFR
conditions expected after 14z. East wind 5-8 kt will become
0309-13kt after 12z. Albrecht

Marine A surface low just west of grays harbor will drop
southward onto the oregon coast late tonight. Winds will increase
from the northeast as the low moves south of the area later
tonight into mainly Thursday morning. Small craft advisories begin
over the coastal waters at 11 pm this evening, while they begin in
the northern inland waters and at the east entrance to the strait
6 am Thursday. Visibility will locally be reduced in snow showers
until midnight (1 2 to 2 miles).

Winds will decrease Thursday afternoon as high pressure moves
southeast across the area.

A stronger frontal system will move southeast across the area on
Friday. This system will give widespread small craft advisory
conditions to the waters. A set of stronger systems Saturday and
Sunday will affect the area and may result in gale conditions over
some of the waters over the weekend. Albrecht

Hydrology River flooding is not expected the next 7 days.

Sew watches warnings advisories
Wa... Winter weather advisory until 3 am pst Thursday for admiralty
inlet area-bremerton and vicinity-central coast-san juan
county-tacoma area-western strait of juan de fuca.

Winter weather advisory until 7 am pst Thursday for eastern
strait of juan de fuca-hood canal area-lower chehalis
valley area-southwest interior.

Winter weather advisory until 9 pm pst this evening for north
coast.

Pz... Small craft advisory from 11 pm this evening to 11 pm pst
Thursday 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 from 6 am to 6 pm pst Thursday for east
entrance u.S. Waters strait of juan de fuca-northern inland
waters including the san juan islands.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTWW1 - 9444900 - Port Townsend, WA 2 mi43 min WNW 4.1 G 5.1 31°F 46°F1024.6 hPa (+1.0)
SISW1 - Smith Island, WA 15 mi43 min N 16 G 18 31°F 1023.9 hPa
PBFW1 - Padilla Bay Reserve, WA 27 mi73 min ENE 2.9 25°F 1024 hPa23°F
46088 - New Dungeness, WA (Hein Bank) 28 mi53 min NNE 9.7 G 14 33°F 45°F1 ft1024.4 hPa (+1.5)27°F
46120 30 mi42 min E 7.8 32°F 1022.8 hPa28°F
FRDW1 - 9449880 - Friday Harbor, WA 33 mi67 min NNE 6 G 12 29°F 46°F1024.8 hPa
WPOW1 - West Point, WA 35 mi43 min NNE 15 G 17 33°F 1023.1 hPa28°F
PTAW1 - 9444090 - Port Angeles, WA 38 mi67 min 2.9 G 5.1 30°F 46°F1024.2 hPa
EBSW1 - 9447130 - Seattle, WA 41 mi43 min NNW 4.1 G 7 32°F 47°F1023.2 hPa (+0.7)

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, WA17 mi47 minESE 310.00 miPartly Cloudy27°F23°F85%1025.2 hPa

Wind History from NUW (wind in knots)
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Last 24hrE6E3SE6SE3E7E9E8SE9SE9SE6SE7SE9SE9SE7SE7E9E10E9E9E5E4NE10N6SE3
1 day agoE7E8E9E6E6E7E6E7E9E5E64NE5N8N7N9N4N10NE9N5N4N5NE3E6
2 days agoN8N6NE7N5--E5CalmS3NE6NE8N9NW10NW12N7NW5NE4SE4S4SE3E4E5SE5E7E6

Tide / Current Tables for Point Hudson, Washington
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Point Hudson
Click for Map
Thu -- 12:20 AM PST     Moonset
Thu -- 01:30 AM PST     4.48 feet Low Tide
Thu -- 07:05 AM PST     Sunrise
Thu -- 08:11 AM PST     8.86 feet High Tide
Thu -- 10:37 AM PST     Moonrise
Thu -- 03:05 PM PST     1.40 feet Low Tide
Thu -- 05:44 PM PST     Sunset
Thu -- 10:35 PM PST     6.72 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
54.54.555.86.77.78.48.88.67.86.34.52.91.81.41.72.43.44.55.46.26.76.7

Tide / Current Tables for Point Hudson, 0.5 mile E of, Washington Current
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Point Hudson
Click for MapFlood direction 115 true
Ebb direction 10 true

Thu -- 12:20 AM PST     Moonset
Thu -- 12:35 AM PST     0.00 knots Slack
Thu -- 03:54 AM PST     0.97 knots Max Flood
Thu -- 06:12 AM PST     -0.00 knots Slack
Thu -- 07:05 AM PST     Sunrise
Thu -- 10:36 AM PST     -0.59 knots Max Ebb
Thu -- 10:37 AM PST     Moonrise
Thu -- 01:43 PM PST     0.00 knots Slack
Thu -- 05:11 PM PST     1.21 knots Max Flood
Thu -- 05:44 PM PST     Sunset
Thu -- 08:04 PM PST     -0.00 knots Slack
Thu -- 11:23 PM PST     -0.30 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.10.20.60.910.70.2-0.1-0.3-0.5-0.6-0.6-0.4-0.20.20.71.11.21.10.70-0.1-0.2-0.3

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Seattle, WA (5,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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Disclaimer:
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 numerious 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.