Wednesday, November22, 2017 L-36.com


Marine Weather and Tides
Mirrormont, 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 7:23AMSunset 4:25PM Wednesday November 22, 2017 2:55 AM PST (10:55 UTC) Moonrise 10:48AMMoonset 8:01PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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- 242 Am Pst Wed Nov 22 2017
Today..S wind 5 to 15 kt. Wind waves 2 ft or less. Rain likely.
Tonight..S wind 5 to 15 kt. Wind waves 2 ft or less. Rain.
Thu..SW wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain in the morning then showers likely in the afternoon.
Thu night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri night..S wind 5 to 15 kt becoming variable after midnight. Wind waves 2 ft or less.
Sat..NE wind 10 to 20 kt becoming se. Wind waves 1 to 3 ft.
Sun..S wind 10 to 20 kt becoming se 5 to 15 kt. Wind waves 1 to 3 ft.
PZZ100 242 Am Pst Wed Nov 22 2017
Synopsis for the northern and central washington coastal and inland waters..Strong southerly flow will continue over the waters through today ahead of a frontal system over the offshore waters. The front will move into the waters late tonight and will be followed by a trough on Thursday. A deepening low will move north through the offshore waters on Saturday.

7 Day Forecast for Marine Location Near Mirrormont, WA
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location: 47.47, -122     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 220526
afdsew
area forecast discussion
national weather service seattle wa
900 pm pst Tue nov 21 2017

Synopsis A moist frontal system will bring rain to western
washington tonight. The heaviest rainfall will occur in the
mountains and should begin to gradually decrease from northwest
after midnight. The snow level will be near 8000 feet. After a lull
in the rain on Wednesday, another wet frontal system will move
through the region Wednesday night through thanksgiving morning.

After another break on Friday, another system will reach the area
Saturday afternoon and night. This active weather pattern will
continue into early next week.

Short term Water vapor and IR imagery shows a long fetch of warm
moist air extending from just east of the hawaiian islands northeast
into the pacific northwest. This looks like a classic atmospheric
river pattern. The freezing level at forks is over 10k feet so the
air mass is capable of holding a lot of moisture. Rain amounts the
past 24 hours range from roughly 3-5 inches in the olympics to 2-4
inches in the cascades. With the heaviest amounts over the olympic
peninsula it not surprising that a couple rivers are flooding.

Amounts are somewhat lighter in the cascades, but still respectable.

See the hydrology section below and refer to the latest flood
bulletins for current and detailed river information.

Models generally show a gradually decrease in rainfall rates from
the northwest after midnight. The heavier rain has arrived in
batches and not the typically focused stream of heavy rain that
usually is observed. Pretty much all models show a lull in rain
across the area on Wednesday. It will still be a bit wet but rain
amounts will not be nearly as heavy.

The next wave of rain arrives Wednesday night and Thursday ahead of
a front approaching from the west-northwest. Models show this next
system to be more progressive in nature, so rain amounts should not
be quite as heavy. However, there will still be some flood risk on
area rivers and forecasts should be monitored through the week.

Another lull or break on some of the rain is expected on Friday.

Mercer

Long term From previous discussion... The GFS and ECMWF are
actually in fair agreement with the large scale pattern through this
weekend. Another large upper level trough will deepen offshore along
roughly 140w Friday night and Saturday, which will re-invigorate the
sw flow over the pacnw. This will allow another shortwave trough
embedded in the SW flow to move NE across W wa Saturday afternoon
and evening. The weakening main upper level trough should follow on
Sunday. The models show a warm front arriving on Monday, but day 6
is a little far out for much confidence in this active pattern. Kam

Aviation Moist southwest flow aloft will continue through
Wednesday night. A warm front near the canadian border will move
north of the area this evening, but rain will continue at times in
the moist southwest flow. The air mass will be stable. At the
surface, easterly gradients are becoming more southeasterly behind
the warm front. While low level wind shear has come to an end
behind the warm front, expect strong winds 19040-55 kt to continue
at times between 030 and 050 through Wednesday night.

There has been some improvement in conditions behind the warm
front, but the high levels of moisture are producing rain at times
and low ceilings in places. Overall, expect MVFR conditions with
pockets of ifr conditions to dominate later tonight through
Wednesday morning. Strong flow aloft interacting with the terrain
will give pockets of clearing at times to the lee of the olympics,
especially midday Wednesday through Wednesday evening. Albrecht
ksea... CIGS have improved to just over bkn030 this evening, but
expect them to lower to 015 08z-20z with some diurnal cooling and
a continued influx of tropically moist air from the southwest.

Expect periods of rain to reduce visibilities to 5sm at times
through tonight. Winds will be south 8-11kt through Wednesday
morning and S 12g20 kt late Wed afternoon through evening. Winds
aloft will generally be strong at 19035-55 kt between 2500 and
5000 ft msl through Wednesday night. Albrecht

Marine A warm front near the canadian border will lift north of
the waters this evening. Another frontal system approaching the
coastal waters from the west will give rather strong south to
southwest flow to the waters tonight through Wednesday night
behind the warm front. Small craft advisories are in effect for
the coastal waters, and admiralty inlet overnight. The small craft
advisories will continue over the coastal waters through
Wednesday.

Winds are expected to develop ahead of the offshore front
Wednesday night as a wave of low pressure moves through the
offshore waters. Gale force winds are possible over the coastal
waters and at the entrances to the strait as the wave moves by, so
a gale watch continues for these areas for Wednesday night.

Windy southerly flow will continue on Thursday as a trough
brushes the area. Gales are likely on the coast and over the north
inland waters with this system. Another system will arrive around
Saturday, with gales again possible. Albrecht

Hydrology The axis of heaviest rain associated with today's
warm front and its plume of subtropical moisture is moving east of
the area this evening, and precipitation is generally decreasing
across western washington. Already, though, 2 to almost 5 inches
inches of rain has fallen over the olympic mountains, with 1 to 4
inches at mount rainier and around 1 to 3 inches further north over
the cascades. The snow level is around 9000 feet.

There are a number of rivers that will crest close to flood stage
tonight, and a flood watch remains in effect for most of the
forecast area (all but island, san juan, kitsap, and mason
counties). With precipitation decreasing, the upper reaches of some
rivers are starting to crest - especially the olympic peninsula
rivers - and those crests will be moving downstream tonight.

The rivers that face the most imminent threat of reaching flood
stage tonight include the nooksack, stillaguamish, skykomish, and
snoqualmie; they are still too close to call at this point, but
warnings could be issued this evening. If flooding does occur on
these rivers, it will be minor.

On the olympic peninsula, the skokomish river is flooding and the
bogachiel is just reaching flood stage. Flood warnings are in effect
for both rivers.

With regard to rivers flowing off of mount rainier, the northwest
river forecast center model shows reaches of the nisqually and the
cowlitz rivers reaching flood stage, but the threat there does look
as imminent.

In addition, the threat of landslides will increase across the
lowlands of western washington. The USGS landslide guidance shows
one or two stations near or just above the threshold of concern, and
of course the additional rain through Thursday will drive that
higher. Mcdonnal

Sew watches warnings advisories
Wa... Flood watch through Thursday afternoon for all of western
washington from grays harbor and lewis counties northward
(except for mason, kitsap, san juan, island counties).

Pz... Small craft advisory for rough bar until 4 pm pst Wednesday for
grays harbor bar.

Gale watch from Wednesday afternoon through late Wednesday night
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-east entrance u.S.

Waters strait of juan de fuca-northern inland waters
including the san juan islands.

Small craft advisory until 4 pm pst Wednesday 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 midnight pst tonight for east
entrance u.S. Waters strait of juan de fuca-northern inland
waters including the san juan islands.

Small craft advisory until 4 am pst Wednesday for admiralty
inlet-west entrance u.S. Waters strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 20 mi38 min ESE 4.1 G 5.1 58°F 51°F1014.4 hPa
TCNW1 - 9446484 - Tacoma, WA 26 mi44 min 57°F 52°F1014.5 hPa
TCMW1 - 9446482 - Tacoma Met, WA 26 mi38 min SE 4.1 G 4.1
WPOW1 - West Point, WA 27 mi56 min SSE 13 G 14 57°F 1014.1 hPa (+0.0)56°F
46121 41 mi33 min 5.8 58°F 1013.8 hPa56°F

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA12 mi63 minSE 310.00 miLight Rain55°F55°F100%1014.8 hPa
Boeing Field - King County International Airport, WA16 mi63 minSSE 68.00 miLight Rain56°F55°F97%1014.3 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi63 minSE 57.00 miLight Rain56°F55°F97%1015.1 hPa

Wind History from RNT (wind in knots)
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Last 24hrS3CalmCalmNW5CalmNW5CalmCalmCalmCalmSE5SE5SE5S64E43SE64S4S4SE3SE3SE3
1 day agoS3SE5CalmCalmW6NW9W3S5S3S33S6S9S4CalmCalmCalmCalmCalmCalmCalm3CalmCalm
2 days agoSE4S6SE5SE4SE5SE5SE4S5SE3S5S9S83CalmCalm3E63CalmCalmCalm3SE3Calm

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Wed -- 12:47 AM PST     -0.44 feet Low Tide
Wed -- 07:24 AM PST     Sunrise
Wed -- 08:03 AM PST     11.43 feet High Tide
Wed -- 10:48 AM PST     Moonrise
Wed -- 01:46 PM PST     6.45 feet Low Tide
Wed -- 04:25 PM PST     Sunset
Wed -- 06:08 PM PST     9.04 feet High Tide
Wed -- 08:02 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.40.52.44.97.49.610.911.411.110.28.97.66.76.577.88.698.87.96.44.62.7

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
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Restoration Point
Click for Map
Wed -- 01:34 AM PST     0.00 knots Slack
Wed -- 04:07 AM PST     0.71 knots Max Flood
Wed -- 07:25 AM PST     Sunrise
Wed -- 08:10 AM PST     -0.00 knots Slack
Wed -- 10:49 AM PST     Moonrise
Wed -- 11:12 AM PST     -0.56 knots Max Ebb
Wed -- 03:26 PM PST     0.00 knots Slack
Wed -- 03:54 PM PST     0.06 knots Max Flood
Wed -- 04:26 PM PST     Sunset
Wed -- 05:36 PM PST     -0.00 knots Slack
Wed -- 08:02 PM PST     Moonset
Wed -- 10:20 PM PST     -0.81 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.5-0.20.20.60.70.70.50.30-0.2-0.5-0.6-0.5-0.4-0.2-0.10.10-0.1-0.3-0.5-0.7-0.8-0.8

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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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.