Wednesday, September20, 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 6:52AMSunset 7:09PM Wednesday September 20, 2017 9:33 AM PDT (16:33 UTC) Moonrise 6:13AMMoonset 6:43PM Illumination 0% Phase: New Moon; Moon at 29 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- 826 Am Pdt Wed Sep 20 2017
Today..N wind to 10 kt. Wind waves 1 ft or less. Scattered showers.
Tonight..SW wind to 10 kt becoming S after midnight. Wind waves 1 ft or less. A slight chance of showers.
Thu..SW wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less in the morning becoming less than 1 ft. A slight chance of showers.
Thu night..Light wind. Wind waves 1 ft or less.
Fri..Light wind becoming N to 10 kt in the afternoon. Wind waves less than 1 ft.
Fri night..Light wind. Wind waves less than 1 ft.
Sat..Light wind. Wind waves less than 1 ft.
Sun..Light wind. Wind waves less than 1 ft.
PZZ100 826 Am Pdt Wed Sep 20 2017
Synopsis for the northern and central washington coastal and inland waters..A trough will move into oregon today. A weak low will move through the coastal waters tonight. High pressure will build Friday and remain over the waters through the weekend.

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 201530
afdsew
area forecast discussion
national weather service seattle wa
830 am pdt Wed sep 20 2017

Synopsis A large upper level low will maintain a chance of
showers and cooler temperatures over western washington through
Thursday. Drier north flow aloft from an upper level ridge will
bring more sunshine and a little warming Friday through Tuesday.

Short term A large upper level low remains over the pacnw with
the main low center over alberta. An upper level shortwave trough
rotating around the main low was over the S wa coast this morning,
and was dousing the central south wa coast, the SW interior, and the
s cascades with rain. Models slide the shortwave trough over the s
cascades by 21z, allowing the area of rain to break up. Otherwise
the rest of W wa will have scattered showers. NAM bufr soundings
show the lower air mass unstable up to a little above 700 mb.

As the shortwave trough slides E tonight, somewhat drier N flow
aloft from an approaching offshore upper level ridge will develop
over W wa. The lower air mass will still remain fairly moist on
Thursday, so not a lot of clearing is expected. The air mass should
be stabilizing for just a slight chance of showers.

Dry N flow aloft ahead of the approaching offshore upper level ridge
will strengthen on Friday for a dry day with more sunshine. High
temperatures will warm a bit but should still be a couple of degrees
below normal. Kam

Long term Previous discussion from the 326 am afd... The medium
range solutions were suggesting that the tail end of frontal systems
passing to our north might bring a threat of light rain to the
northwest part of the CWA this weekend into Monday. The GFS was
starting to come more in line with the wetter ECMWF solution. For
now, decided to keep the inherited dry forecast but will need to
introduce rain if the 1200 utc cycle continues with the idea of
wetter conditions. At any rate, expect the ridge to be a bit dirty
(mid and or high clouds streaming across the area) through Monday.

Anticipate the upper ridge to rebound the end of the period for
dry weather with near normal temps.

Aviation There are areas of rain or showers from about
hoquiam south and south of seattle this morning--and there were some
showers up over the san juans. An upper level trough is over the
region with light flow over western washington. Drier northerly flow
will develop slowly and northerly flow aloft will develop so that
will help drive the system over oregon slowly away. There is some
clearing north of seattle this morning and overall more clearing
from the north is likely through this evening before low clouds
redevelop overnight due to the light flow, stabilizing air, and low
level moisture.

Ksea... Winds should come around to light NW today and most of the
showers should stay south of the area now.

Marine A weather system is over the region but the blustery
pressure gradients are south of the wa oregon border--western wa
has rather light gradients. Weak low pressure will remain over the
wa coastal waters through Thursday and then high pressure will build
Friday and Saturday.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory from 6 pm this evening to 2 am pdt Thursday
for coastal waters from CAPE flattery to james island 10 to
60 nm-coastal waters from james island to point grenville
10 to 60 nm-coastal waters from point grenville to cape
shoalwater 10 to 60 nm.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 43 mi45 min 50°F 56°F1004.3 hPa
TCMW1 - 9446482 - Tacoma Met, WA 43 mi45 min N 2.9 G 5.1
EBSW1 - 9447130 - Seattle, WA 48 mi45 min NW 4.1 G 5.1 52°F 55°F1004 hPa

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stampede Pass, WA16 mi97 minN 07.00 miOvercast36°F35°F97%1003.1 hPa

Wind History from SMP (wind in knots)
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Last 24hrCalm343--54CalmCalm4W7W7
G18
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4CalmCalmCalmCalmCalmCalmCalmCalmCalm4
1 day ago33365NW10
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NW453CalmCalmCalmCalm4CalmCalmCalmCalm3CalmCalm333
2 days agoCalm43Calm3Calm3CalmCalmCalm4W9
G21
444434334434

Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Wed -- 05:32 AM PDT     10.85 feet High Tide
Wed -- 06:53 AM PDT     Sunrise
Wed -- 07:16 AM PDT     Moonrise
Wed -- 11:47 AM PDT     0.99 feet Low Tide
Wed -- 06:12 PM PDT     11.86 feet High Tide
Wed -- 07:10 PM PDT     Sunset
Wed -- 07:46 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.93.85.67.79.610.710.79.87.95.53.11.411.93.96.59.11111.811.510.17.95.43.3

Tide / Current Tables for Tacoma, Commencement Bay, Sitcum Waterway, Puget Sound, Washington (sub)
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Tacoma
Click for Map
Wed -- 05:28 AM PDT     11.03 feet High Tide
Wed -- 06:54 AM PDT     Sunrise
Wed -- 07:16 AM PDT     Moonrise
Wed -- 11:39 AM PDT     0.83 feet Low Tide
Wed -- 06:05 PM PDT     11.89 feet High Tide
Wed -- 07:10 PM PDT     Sunset
Wed -- 07:46 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.73.75.67.99.810.910.99.87.85.22.71.10.92.14.26.99.511.211.911.4107.75.23.1

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 (12,3,4,5)
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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.