Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Greenwater, 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 7:21AMSunset 4:27PM Tuesday November 21, 2017 11:31 AM PST (19:31 UTC) Moonrise 9:58AMMoonset 7:10PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 900 Am Pst Tue Nov 21 2017
Today..NE wind to 10 kt becoming se in the afternoon. Wind waves 1 ft or less. Rain.
Tonight..S wind 10 to 20 kt. Wind waves 1 to 3 ft. Rain.
Wed..S wind 5 to 15 kt. Wind waves 2 ft or less. Rain likely.
Wed night..S wind 10 to 20 kt rising to 15 to 25 kt after midnight. Wind waves 1 to 4 ft.
Thu..SW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Thu night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri..S wind 15 to 25 kt becoming se to 10 kt. Wind waves 2 to 4 ft subsiding to 1 ft or less.
Sat..SE wind to 10 kt becoming S 15 to 25 kt. Wind waves 1 ft or less building to 2 to 4 ft.
PZZ100 900 Am Pst Tue Nov 21 2017
Synopsis for the northern and central washington coastal and inland waters..A strong warm front will move north through the area today. Gale force winds are likely on the coast and at the west entrance, with small craft advisory strength winds elsewhere. Southerly flow will continue Wednesday through next weekend as a series of fronts bring gale force winds at times.

7 Day Forecast for Marine Location Near Greenwater, WA
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location: 47.19, -121.61     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 211657
afdsew
area forecast discussion
national weather service seattle wa
857 am pst Tue nov 21 2017

Synopsis A strong warm front, fed by a plume of warm
subtropical moisture will bring heavy rain to western washington
today and tonight, with the snow level rising to near 8000 feet.

After a relative break in the weather on Wednesday, another wet
frontal system will move through the region Wednesday night and
thanksgiving. There will be another break on Friday, followed by
more wet weather this weekend and into Monday.

Short term Radar has been lit up this morning by rain from the
incoming warm front. Strong SW flow aloft has created a tiny rain
shadow NE of the olympics around port townsend. IR imagery shows
the tap into subtropical moisture E of hawaii. The heaviest rain
is still expected late this morning through this afternoon.

Precipitation is expected to diminish, but not end, this evening
as a slight shift in the flow aloft directs the weakening moist
plume over oregon. The subtropical air mass will push snow levels
up to around 8000 feet this afternoon and remain near that level
tonight. Models have been fairly consistent with regard to
precipitation amounts; storm totals for today and tonight should
be roughly 2 to 5.5 inches over the olympics and mount rainier,
with 1 to 4 inches over the cascades north of mount rainier.

Warm moist southwest flow aloft will continue Wednesday, as
an upper trough digs into our far offshore waters outside of 135w.

There will be more rain on Wednesday, especially at the coast and
over the mountains, but it will be a relative break in the action.

Precipitation in the mountains will amount to another half inch to
inch, with the snow level still near 8000 feet. The warm air mass
will push temperatures up to around 10 degrees above normal on
Wednesday, with highs near 60.

The next frontal system will develop offshore on Wednesday, ahead
of the upper trough, and progress across western washington
Wednesday night and thanksgiving. The snow level will be around
7000 feet as the event starts, then lower to around 4000 feet
behind the front as precipitation decreases Thursday night. This
system doesn't look quite as wet, but it should bring another 1.5
to 3.5 inches of precipitation to the mountains with the heaviest
amounts over the olympics. Mcdonnal kam

Long term Previous discussion from the 325 am afd... The models
agree fairly well on the big picture in the long term period,
Friday through Monday. They show a short- lived, relative break in
the weather on Friday, then two frontal systems in quick
succession on Saturday and Sunday, followed by cooler moist
westerly flow on Monday. Confidence in model details isn't very
high, but I will increase pops somewhat for Saturday through
Sunday night. Mcdonnal

Aviation Strong southwest flow aloft will continue today and
tonight. A warm front will move across the area from south to north
today. Rain today, tapering tonight. The air mass will be stable
through tonight. At the surface, strong easterly gradients will ease
tonight and become more southeasterly. Llws is possible at most
terminals today.

Conditions are generally MVFR today with pockets of ifr. Low end
MVFR conditions will continue behind the warm front tonight, but
rainfall rates and low level wind shear will decrease from the
south.

Ksea... Discussion above applies. Northeast or east winds 4-8 kt will
become southeast 8-12 kt after 00z. Chb

Marine A warm front will move south to north across the area
today. Strong offshore flow will give gales to the coast and west
entrance, with small craft advisory conditions elsewhere.

Another frontal system west of the waters will give strong southerly
flow Wednesday and Wednesday night. Windy southerly flow will
continue on Thursday as a trough brushes the area. Gales are
possible with this system.

Latest model solutions show a developing low offshore moving by to
the west of the waters on Saturday. This will give windy
conditions to the area on Saturday. Chb

Hydrology A warm front and the plume of subtropical moisture
with it will bring 2 to 5.5 inches of rain to the olympics and
mount rainier today and tonight, and 1 to 4 inches of rain to the
cascades north of mount rainier. The snow level will be near 8000
feet. A second frontal system will bring another 1 to 4 inches on
Wednesday night and Thursday, with the snow level falling from
7000 feet to 4000 feet as the system moves through.

A flood watch is in effect for most of the forecast area. The
skokomish river, which only fell below flood stage Monday
evening, will almost certainly flood again late today or tonight.

In addition the northwest river forecast center models show
several rivers cresting near or just above flood stage including
the cowlitz, nisqually, white, snoqualmie, stillaguamish, skagit,
and nooksack. This doesn't mean the possibility of flooding is
limited to these rivers. Flooding on these rivers could begin
tonight or Wednesday. It looks like the threat is for a relatively
minor flooding episode.

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 today and tonight and again
Wednesday and Thursday will drive that higher. Mcdonnal

Sew watches warnings advisories
Wa... Flood watch from 4 pm pst this afternoon through Thursday
afternoon for admiralty inlet area-bellevue and vicinity-
cascades of pierce and lewis counties-cascades of snohomish
and king counties-cascades of whatcom and skagit counties-
central coast-east puget sound lowlands-eastern strait of
juan de fuca-everett and vicinity-hood canal area-lower
chehalis valley area-north coast-olympics-seattle and
vicinity-southwest interior-tacoma area-western skagit
county-western strait of juan de fuca-western whatcom
county.

Pz... Small craft advisory for rough bar from 4 pm this afternoon to 4
pm pst Wednesday for grays harbor bar.

Gale warning until 4 pm pst this afternoon 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-west entrance u.S. Waters strait of
juan de fuca.

Small craft advisory until 10 pm pst this evening for 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 this afternoon for central
u.S. Waters strait of juan de fuca.

Small craft advisory until 4 am pst Wednesday for admiralty
inlet.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 43 mi49 min 43°F 51°F1014.2 hPa
TCMW1 - 9446482 - Tacoma Met, WA 43 mi43 min ESE 1.9 G 2.9
EBSW1 - 9447130 - Seattle, WA 48 mi43 min Calm G 1.9 45°F 51°F1014.1 hPa

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stampede Pass, WA16 mi35 minVar 31.25 miLight Rain Fog/Mist33°F32°F96%1020.3 hPa

Wind History from SMP (wind in knots)
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Last 24hr54S76
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6CalmCalmCalmNE3Calm34456565663
1 day agoCalmCalmE3CalmCalmCalmCalmCalmNE3CalmNE3NE3NE3NE3NE33NE43Calm344Calm3
2 days ago44433CalmCalmCalmCalm--CalmCalmCalmCalmCalmCalmCalmW4CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Tue -- 12:08 AM PST     -0.68 feet Low Tide
Tue -- 07:23 AM PST     Sunrise
Tue -- 07:27 AM PST     12.13 feet High Tide
Tue -- 10:01 AM PST     Moonrise
Tue -- 12:56 PM PST     6.71 feet Low Tide
Tue -- 04:27 PM PST     Sunset
Tue -- 05:35 PM PST     10.03 feet High Tide
Tue -- 07:12 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.21.546.89.311.2121211.29.88.37.16.77.18.19.19.9109.27.75.73.51.3

Tide / Current Tables for Tacoma, Commencement Bay, Sitcum Waterway, Puget Sound, Washington (sub)
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Tacoma
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Tue -- 07:17 AM PST     12.16 feet High Tide
Tue -- 07:22 AM PST     Sunrise
Tue -- 10:01 AM PST     Moonrise
Tue -- 12:59 PM PST     6.99 feet Low Tide
Tue -- 04:27 PM PST     Sunset
Tue -- 05:40 PM PST     10.01 feet High Tide
Tue -- 07:13 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-0.21.84.47.39.811.412.11211.19.98.47.477.38.19.19.8109.37.75.53.10.9

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 (14,3,4,5)
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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.