Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Black Diamond, 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 6:04 AM PDT (13:04 UTC) Moonrise 6:15AMMoonset 6:45PM 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- 240 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. 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. 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 1 ft or less.
Fri night..Light wind. Wind waves less than 1 ft.
Sat and Sun..Light wind. Wind waves less than 1 ft.
PZZ100 240 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 surface 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 Black Diamond, WA
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location: 47.3, -122     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 201026
afdsew
area forecast discussion
national weather service seattle wa
326 am pdt Wed sep 20 2017

Synopsis The chilly low pressure system that has been over the
region the past couple of days will slowly move east through
Thursday for a gradual drying and warming trend. High pressure
aloft will prevail on Friday for sunnier, drier, and warmer
conditions.

Short term
Showers have been mainly confined to the southwest quarter of the
cwa overnight. There will be a slight northward shift of the
precip band during the next few hours as it pivots around the
upper level low and becomes east-west oriented. The heavier
precip is expected to be south of the cwa. The air mass will be
marginally unstable today. It looks like the best chance of
thunderstorms will be over the coastal waters.

Meanwhile, the chilly upper level trof that has been over the
region the past couple of days will move slowly east through
Thursday. This will not only cause the flow aloft to become
northerly but will also allow for a gradual drying and warming
trend.

Expect the region to become more under the influence of an
amplified upper level ridge centered well offshore on Friday. The
main impact will be sunnier, drier, and warmer conditions.

Long term
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 Upper level trough over the area with light flow aloft
becoming northerly this afternoon and evening. Air mass remaining
moist and somewhat unstable with a drying trend north portion
after 00z.

Multiple cloud layers between about 2000 feet and 7000 feet this
morning with the 2000 foot deck becoming predominately broken
12z-15z. Local ceilings below 1000 feet until 18z. Ceilings
improving this afternoon with the lower cloud layer dissipating
leaving a scattered to broken decks around 4000 and 600 feet.

Clearing from the north tonight.

Ksea... Ceilings 1000-2000 feet early withVFR ceilings by 19z.

Southerly winds 4 to 8 knots switching to northwesterly around
19z. Felton

Marine Trough moving over oregon today with surface gradients
remaining light. Weak surface low moving south through the coastal
waters Thursday morning. High pressure building in on Friday and
remaining over the weekend. Felton

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 22 mi52 min 52°F 55°F1003.3 hPa
TCMW1 - 9446482 - Tacoma Met, WA 22 mi46 min Calm G 1
EBSW1 - 9447130 - Seattle, WA 28 mi46 min WSW 1.9 G 2.9 53°F 55°F1003.3 hPa
WPOW1 - West Point, WA 34 mi64 min NE 2.9 G 4.1 51°F 1003.5 hPa (-0.9)47°F
46120 38 mi43 min ESE 3.9 50°F 1002.4 hPa46°F
46121 39 mi39 min 3.9 51°F 1002.2 hPa49°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA18 mi71 minSE 310.00 miLight Rain51°F50°F96%1003.5 hPa
Seattle, Seattle-Tacoma International Airport, WA19 mi71 minSSE 48.00 miOvercast51°F48°F89%1003.7 hPa
Pierce County-Thun Field, WA20 mi69 minN 010.00 miOvercast48°F48°F100%1003 hPa
Boeing Field - King County International Airport, WA22 mi71 minN 010.00 miOvercast52°F51°F97%1003.1 hPa

Wind History from RNT (wind in knots)
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Last 24hrSE4SE4SE56SE7S8S8S7SE9S4NW5S8W9W3CalmCalmCalmCalmCalmCalmCalmCalmSE3Calm
1 day agoSE5CalmS6S9S9S10
G15
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G18
S10S8S7S34CalmSE4SE3SE8SE5E3SE34E3E3SE5SE4
2 days agoSE4SE3S8SE8SE8S10
G19
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G14
S733SE34E5S5CalmS3CalmCalmCalmNW4CalmS5S9S5

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 (9,2,3,4)
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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.