Wednesday, February21, 2018 L-36.com


Marine Weather and Tides
Ashford, 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 6:59AMSunset 5:45PM Wednesday February 21, 2018 4:55 PM PST (00:55 UTC) Moonrise 10:04AMMoonset 12:00AM Illumination 42% 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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PZZ135 Puget Sound And Hood Canal- 304 Pm Pst Wed Feb 21 2018
Tonight..Variable wind to 10 kt becoming ne 5 to 15 kt after midnight. Wind waves 2 ft or less. Snow likely in the evening then a chance of snow after midnight.
Thu..N wind 10 to 20 kt. Wind waves 1 to 3 ft. A slight chance of snow in the morning.
Thu night..N wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Fri..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.
Fri night..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
Sat..Variable wind 5 to 15 kt becoming N in the afternoon. Wind waves 2 ft or less.
Sat night..Variable wind to 10 kt becoming S after midnight. Wind waves 1 ft or less.
Sun..SW wind 15 to 25 kt easing to 10 to 20 kt. Wind waves 2 to 4 ft.
Mon..S wind to 10 kt becoming light. Wind waves 1 ft or less.
PZZ100 304 Pm Pst Wed Feb 21 2018
Synopsis for the northern and central washington coastal and inland waters..A weak storm system moving through area waters this evening will bring increasing northeast flow and snow showers into early Thursday. A ridge of high pressure will move southeast across the waters Thursday afternoon. Another stronger low will move southeast across the waters on Friday.

7 Day Forecast for Marine Location Near Ashford, WA
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location: 46.81, -122.06     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 220007
afdsew
area forecast discussion
national weather service seattle wa
407 pm pst Wed feb 21 2018

Synopsis A weak system southeast across western washington
this evening, bringing light lowland snow. 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 Lowland snow will be the main forecast challenge in
the days ahead. However, amounts do not look particularly heavy.

Cool north-northwest flow aloft will continue for the next week.

In the short term, satellite imagery shows the next shortwave in
this flow pattern diving s-se down the b.C. Coast and approaching
the northwest olympic peninsula. The shortwave trough axis will
move southeast across western washington late this evening, around
06z or 10 pm. In advance of the trough axis, 850 mb progs show
some westerly flow off the pacific and a warm advection pattern,
which leads to lift. Meanwhile, the surface reflection will be a
weak 1020 mb low which will move s-se between the coast and 130w,
so surface flow will never turn strongly onshore. This will help
the low-level air mass stay cold enough for precip type to remain
snow, except perhaps at the immediate coast this evening. Many
sites have already reported small snow fall amounts, and radar
shows the main band of snow now spreading southeast across the
northwest olympic peninsula. Runs of the hrrr models this
afternoon have added a little QPF this evening around olympia and
tacoma, so have recently expanded the winter weather advisory
eastward by one more layer of zones, adding the admiralty inlet
area, bremerton area, and tacoma area. Locales outside of the
advisory area are also likely to see some snow but are likely to
remain under 1 inch on accumulations. This includes seattle and
everett.

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.

Long term 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 trough sliding into western
washington has brought MVFR ceilings with areas of light snow to the
northern portion of the area this afternoon. This will continue to
spread south this evening. Snow showers will remain light especially
through the metro area where shadowing will help to further limit
what is already a weak system. Expect showers to taper off from the
north by late evening with ceilings and visibilities lifting toVFR
levels after midnight. Flow aloft will remain northerly Thursday as
the upper level trough moves south of the area.

Ksea...VFR conditions will linger into this evening. Light snow
showers associated with the weak system moving in from the north
have already begun to affect the terminal. Expect lower MVFR
conditions and light snow accumulations - less than an inch of snow
by late evening. Ceilings and visibilities will return toVFR levels
by 08z-10z. South winds 8-10 kt will become easterly 5-7 kt
after midnight.

Marine A surface low moving south along the british columbia
coast and onto the northern oregon coast this evening will bring
light snow showers to area waters this evening. Increasing
northeasterly flow behind the low later tonight into early Thursday
will bring small craft advisory conditions to the coastal waters as
well as the eastern strait and northern inland waters.

High pressure will move SE across the waters Thursday afternoon
followed by another surface low expected to move SE across area
waters on Friday. This system is expected to bring widespread small
craft advisory conditions on Friday. 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.

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-tacoma area.

Winter weather advisory until 7 am pst Thursday for hood canal
area-lower chehalis valley area-southwest interior.

Winter weather advisory until 7 am pst Thursday for eastern
strait of juan de fuca.

Winter weather advisory until 3 am pst Thursday for san juan
county-western strait of juan de fuca.

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
TCNW1 - 9446484 - Tacoma, WA 37 mi44 min 33°F 47°F1024.9 hPa
TCMW1 - 9446482 - Tacoma Met, WA 37 mi44 min SE 7 G 8.9
46121 48 mi32 min 35°F 1024.2 hPa27°F
EBSW1 - 9447130 - Seattle, WA 57 mi38 min S 6 G 8.9 35°F 46°F1024.5 hPa

Wind History for Tacoma MET, WA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pierce County-Thun Field, WA24 mi61 minN 02.50 miLight Snow32°F30°F93%1024 hPa

Wind History from PLU (wind in knots)
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Last 24hrCalmCalm3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm5CalmCalmCalm
2 days agoN7
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CalmCalmCalmCalmCalm--CalmCalmCalm44E3565CalmCalm

Tide / Current Tables for Tacoma, Commencement Bay, Washington
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Tacoma
Click for Map
Wed -- 02:09 AM PST     3.55 feet Low Tide
Wed -- 07:04 AM PST     Sunrise
Wed -- 08:24 AM PST     12.15 feet High Tide
Wed -- 10:05 AM PST     Moonrise
Wed -- 03:10 PM PST     1.94 feet Low Tide
Wed -- 05:43 PM PST     Sunset
Wed -- 09:27 PM PST     9.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.64.23.63.95.37.39.411.112.11210.88.96.74.52.722.33.65.47.28.79.59.58.8

Tide / Current Tables for Tacoma, Commencement Bay, Sitcum Waterway, Puget Sound, Washington (sub)
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Tacoma
Click for Map
Wed -- 02:04 AM PST     3.52 feet Low Tide
Wed -- 07:04 AM PST     Sunrise
Wed -- 08:26 AM PST     12.25 feet High Tide
Wed -- 10:04 AM PST     Moonrise
Wed -- 03:03 PM PST     1.95 feet Low Tide
Wed -- 05:42 PM PST     Sunset
Wed -- 09:16 PM PST     9.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.44.13.545.57.59.511.212.112.110.996.74.42.61.92.545.87.699.69.48.6

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 (19,4,5,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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.