Tuesday, August22, 2017 L-36.com


Marine Weather and Tides
Snoqualmie, 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 6:13AMSunset 8:07PM Tuesday August 22, 2017 5:48 PM PDT (00:48 UTC) Moonrise 6:13AMMoonset 7:49PM Illumination 1% Phase: New Moon; Moon at 1 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- 246 Pm Pdt Tue Aug 22 2017
Tonight..N wind 5 to 15 kt becoming se after midnight. Wind waves 2 ft or less.
Wed..Light wind becoming sw to 10 kt in the afternoon. Wind waves 1 ft or less.
Wed night..N wind to 10 kt becoming ne 5 to 15 kt after midnight. Wind waves 2 ft or less. A slight chance of showers.
Thu..NE wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less.
Thu night..NE wind to 10 kt. Wind waves 1 ft or less.
Fri..N wind to 10 kt. Wind waves 1 ft or less.
Fri night..N wind to 10 kt becoming ne after midnight. Wind waves 1 ft or less.
Sat..N wind to 10 kt. Wind waves 1 ft or less.
Sun..N wind to 10 kt rising to 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 246 Pm Pdt Tue Aug 22 2017
Synopsis for the northern and central washington coastal and inland waters..A weak system will approach the region tonight and Wednesday, then continue inland Thursday, resulting in a period of strong onshore flow across western washington. Weaker onshore flow will continue Friday through this weekend, as high pres remains off the coast with lower pres east of the cascades.

7 Day Forecast for Marine Location Near Snoqualmie, WA
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location: 47.53, -121.84     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 222217
afdsew
area forecast discussion
national weather service seattle wa
315 pm pdt Tue aug 22 2017

Synopsis Dry and relatively warm weather will continue
tonight. A weak storm system approaching the region on Wednesday
will bring cooler conditions and a chance of showers. Cool weather
with spotty light showers will linger over western washington
Wednesday night and Thursday. Dry and warmer weather will return
Friday through Monday with above normal temperatures expected
especially through the interior.

Short term Low clouds have burned back to the coastal
waters and west entrance to the strait of juan de fuca this
afternoon leaving clear skies. High temperatures have warmed into
the mid 80s over the interior with a few spots over the south
interior reaching into the upper 80s. The upper level ridge that has
been over the pacific northwest will continue to shift east into the
northern intermountain area this evening ahead of an upper level
trough digging south along the british columbia coast. Increasing
low level flow this afternoon and evening will result in a solid
marine push this evening, with stratus spilling through most of the
interior lowlands by Wednesday morning. The marine stratus will lift
through midday while mid and high level clouds begin to work into
the area ahead of the approaching weak system. Showers are possible
along the north coast by late morning then through the olympic
peninsula through the afternoon and the remainder of the interior
through the evening. Expect rainfall to be light and spotty with the
best bet remaining the coast, north interior and mountains. Light
showers may linger into Thursday morning, especially over the
cascades and in a puget sound convergence zone, during the day
Thursday. Expect some clearing with Sun breaks Thursday afternoon
with high temperatures likely rising into the low 70s across the
interior and mid to upper 60s along the coast.

Long term The upper level trough will slowly lift into
central canada Friday and Saturday leaving the pacific northwest
under a dry, westerly pattern with mostly sunny skies. Expect high
temperatures to gradually warm Saturday and Sunday into the low to
mid 80s over the interior and 70s along the coast. Upper level
heights will rise Monday as the upper level ridge builds along the
west coast into british columbia. This will boost high temperatures
into the upper 80s with a few of the warmer locations in the
southwest interior close to 90. The upper level ridge will shift
east Tuesday with warm and dry conditions continuing.

Aviation Southwest flow aloft over western washington this
afternoon will continue tonight and Wednesday as an upper level
trough approaches the pacific northwest from the offshore waters.

At the surface, high pressure remains offshore with lower pressure
east of the cascades. Onshore flow will increase late today and
tonight, with the marine layer deepening and the air mass becoming
moist below 5000 ft.

There is no significant cloud cover over western washington below
12,000 ft, except where marine stratus covering much of the
coastal waters is intruding into immediate coastal areas. Stratus
will push inland tonight, and conditions will likely deteriorate
to widespread low-end MVFR and local ifr 09z-12. Improvement to
widespreadVFR conditions is likely across the western washington
interior midday to mid-afternoon.

Ksea... West to northwest wind 6-12 kt, backing to southerly 4-10
kt after sunset. There is high confidence that stratus will move
into ksea late tonight, probably 10z-12z, with ceilings
ovc009-015. Stratus should scatter out toVFR conditions around
21z. Mcdonnal

Marine A weak upper trough will approach british columbia and
the pacific northwest tonight and Wednesday, then continue inland
Thursday, resulting in a period of strong onshore flow across
western washington. Gale westerlies are likely both nights in the
central and eastern strait of juan de fuca, with small craft
advisory winds in the adjacent admiralty inlet and northern inland
waters. Weaker onshore flow will continue Friday through this
weekend, as high pressure remains off the coast with lower
pressure east of the cascades. Mcdonnal

Sew watches warnings advisories
Wa... None.

Pz... Gale watch from Wednesday afternoon through late Wednesday night
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.

Gale warning until 6 am pdt Wednesday for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisory from 6 pm this evening to 6 am pdt
Wednesday for admiralty inlet-northern inland waters
including the san juan islands.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 27 mi49 min NW 5.1 G 5.1 71°F 56°F1014.9 hPa (-1.1)
WPOW1 - West Point, WA 33 mi49 min NE 8 G 8.9 68°F 1015.2 hPa (-0.8)57°F
TCMW1 - 9446482 - Tacoma Met, WA 35 mi49 min WNW 6 G 7
TCNW1 - 9446484 - Tacoma, WA 35 mi49 min 83°F 56°F1015 hPa (-1.0)

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA20 mi56 minNNW 410.00 miFair87°F53°F31%1014.9 hPa
Boeing Field - King County International Airport, WA24 mi56 minN 010.00 miFair87°F55°F35%1014.4 hPa

Wind History from RNT (wind in knots)
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Last 24hrNW12NW10NW8NW5NW3N4N6NW6CalmCalmCalmCalmSE3CalmCalmCalmSE3N3NW5--NW6NW5N4NW4
1 day agoN9NW9N7CalmN3N3N3N6NW6NW8N7NW7N43N5NW5NW7NW5W6NW11NW11NW10NW12NW10
2 days agoNW8N6NW9NW6N7N7N6NW7N5NW7NW9N3CalmSE3N4CalmCalm4NW8NW8NW8NW9NW10NW12

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Tue -- 12:04 AM PDT     4.30 feet Low Tide
Tue -- 05:18 AM PDT     10.39 feet High Tide
Tue -- 06:15 AM PDT     Sunrise
Tue -- 07:15 AM PDT     Moonrise
Tue -- 12:08 PM PDT     -1.04 feet Low Tide
Tue -- 06:53 PM PDT     11.65 feet High Tide
Tue -- 08:08 PM PDT     Sunset
Tue -- 08:50 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.34.86.17.99.510.310.2974.51.9-0.1-1-0.51.3479.611.211.6119.57.45.4

Tide / Current Tables for Seattle, Washington
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Seattle
Click for Map
Tue -- 05:17 AM PDT     10.71 feet High Tide
Tue -- 06:14 AM PDT     Sunrise
Tue -- 07:15 AM PDT     Moonrise
Tue -- 11:57 AM PDT     -1.09 feet Low Tide
Tue -- 06:52 PM PDT     12.01 feet High Tide
Tue -- 08:08 PM PDT     Sunset
Tue -- 08:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.55.26.68.39.910.710.49.27.14.31.6-0.4-1.1-0.31.74.57.51011.61211.39.77.45.4

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 (20,4,5,8)
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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.