Tuesday, August21, 2018 L-36.com


Marine Weather and Tides
Des Moines, WA

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Sunrise 6:13AMSunset 8:10PM Tuesday August 21, 2018 7:03 PM PDT (02:03 UTC) Moonrise 4:30PMMoonset 12:44AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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- 243 Pm Pdt Tue Aug 21 2018
Tonight..N wind to 10 kt. Wind waves 1 ft or less. Smoke.
Wed..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less. Smoke.
Wed night..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less. Areas of smoke.
Thu..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Fri..S wind to 10 kt. Wind waves 1 ft or less.
Fri night..Light wind. Wind waves less than 1 ft.
Sat..S wind to 10 kt becoming variable. Wind waves 1 ft or less.
Sun..S wind to 10 kt becoming sw. Wind waves 1 ft or less.
PZZ100 243 Pm Pdt Tue Aug 21 2018
Synopsis for the northern and central washington coastal and inland waters..A thermally induced trough of low pres along the washington coast will weaken this evening and the flow will become nearly flat overnight. Strong onshore flow is still expected to develop on Wednesday. Onshore or westerly flow will continue on Thursday. Meanwhile, the smoke is expected to begin slowly clearing from the west on Wednesday.


7 Day Forecast for Marine Location Near Des Moines, WA
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location: 47.39, -122.35     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 212322
afdsew
area forecast discussion
national weather service seattle wa
422 pm pdt Tue aug 21 2018

Synopsis Weak onshore flow will gradually strengthen thru the
remainder of the week, helping to alleviate thick wildfire smoke
coverage. High pressure will continue aloft through thru Wednesday
night before a transition to large scale troughing and cooler
weather. Several strong waves within this trough can be expected,
especially later in the weekend and into early next week.

Short term As of 22z... Temperatures have actually warmed quite
well this afternoon as recent obs reveal upper 80s to lower 90s
across the majority of the interior. Some areas experienced a
quick reprieve in persistent smoke and it is those locations that
have made it into the 90s. Elsewhere... While very warm... The smoke
has kept temperatures more in check. A quick glance at visible
satellite imagery reveals widespread smoky conditions across
western washington... And an impressive wildfire plume from the
crescent mountain fire in the eastern cascades has drifted SW and
is advecting smoke across the a good portion of the area. The
local maple fire has done similar. So for the remainder of the day
and evening expect warm conditions with widespread smoke under
hazy skies with poor air quality. Remember an air quality alert
remains in effect thru 5pm Wednesday.

As we take on a larger scale view of the atmosphere... Water vapor
imagery suggests the region is under the influence of high
pressure aloft... With a closed area of low pressure located just
to the south across or id my. Meanwhile at the sfc... Light
offshore flow continues as high pressure dominates the plains
region of the country. The synoptic scale pattern will be
progressive thru the end of the work week... With the ridge
expected to dampen late Wednesday and become replaced by cyclonic
flow. Despite a return albeit weak to onshore by midday
Wednesday ... Generally poor air quality conditions can be expected
with areas of smoke lingering. Could see pockets of improvement
late in the day. Onshore flow will strengthen Wednesday night into
Thursday with the return to some marine stratus and drizzle
across western portions of the area. The first in a series of
shortwaves will also push across the area through the day Thursday
into early Friday. Lack of moisture will keep things dry but
could see some isolated light showers Friday as the second wave
pulls thru. By the end of the week... Clean marine air should
noticeably improve air quality and we can finally say goodbye to
the smoke. Kovacik

Long term Persistent cyclonic flow in the mid and upper levels
will make for an active pattern across the pacific northwest.

Onshore flow will continue in the lower levels and while this will
keep smoke away... We will be looking into increasing chances for
much needed rainfall across the area. Saturday looks similar to
Friday with light showers possible... Tho may be slightly more
coverage. By Sunday... Operational 12z ec and GFS runs diverge in
regards to a potentially strong shortwave diving south across the
area from bc. Comparing these runs to eps gem GEFS ensemble
data... The GFS runs closest to the ensemble guidance. That being
said... The ec is much more aggressive in bringing in much deeper
moisture and rain coverage. This will be worth watching. The key
will lie in both the placement and development of a strong ridge
and essentially a high over low block across the central eastern
pacific along with the trajectory of eastern pacific typhoons.

Have gone ahead and basically blended the two solutions for
now... Perhaps slightly favoring the ECMWF for now. Regardless of
the path of the shortwave... At least cooler temps look like a
sure bet through all of this! Unsettled weather will continue
into early next week as the pacific blocking patterns keeps a
pacific northwest troughing pattern locked in. Kovacik

Aviation Skies will remain smoky tonight with N NE flow over
the region. Visibility is generally 1-4sm in fu with a smoke layer
2000-5000 feet. The air mass is dry and stable with an upper
level ridge over the region. Smoky conditions will continue
into Wednesday. 33
ksea... Vis generally 1-4 miles in fu with a smoke layer around
2000-5000 feet. N wind to 10 kt becoming light and variable by
12z. 33

Marine Smoky conditions continue with visibility generally 1-4
miles over the waters. A thermal trough along the washington coast
will weaken this evening and the flow will become nearly flat
overnight. Strong onshore flow will develop on Wednesday with
gales possible through the strait of juan de fuca - a gale watch
is in effect. Onshore flow will continue through the end of the
week. 33

Sew watches warnings advisories
Wa... None.

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



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 9 mi33 min 79°F 56°F1014.6 hPa
TCMW1 - 9446482 - Tacoma Met, WA 9 mi33 min W 4.1 G 5.1
EBSW1 - 9447130 - Seattle, WA 15 mi33 min Calm G 1.9 72°F 56°F1014.4 hPa
WPOW1 - West Point, WA 19 mi123 min NE 8 G 8 73°F 1015.3 hPa (-1.8)55°F
46125 39 mi28 min 7.8 63°F 1014.1 hPa56°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA4 mi70 minN 9 G 183.00 miSmoke Haze89°F46°F23%1015.4 hPa
Boeing Field - King County International Airport, WA10 mi70 minNW 53.00 miHaze Smoke85°F46°F27%1014.2 hPa
Renton Municipal Airport, WA10 mi70 minNW 94.00 miHaze Smoke88°F50°F27%1014.5 hPa
Tacoma, Tacoma Narrows Airport, WA15 mi70 minNNE 62.50 miHaze Smoke84°F52°F33%1014.3 hPa
Tacoma / McChord Air Force Base, WA17 mi65 minNE 73.00 miHaze Smoke87°F55°F34%1014.9 hPa
Pierce County-Thun Field, WA20 mi68 minVar 45.00 miFair with Haze88°F48°F25%1015.2 hPa
Bremerton, Bremerton National Airport, WA23 mi67 minNE 63.00 miFair with Haze87°F51°F29%1016.3 hPa
Fort Lewis / Gray U. S. Army Airfield, WA24 mi65 minNNW 74.00 miHaze Smoke88°F55°F33%1014.8 hPa

Wind History from SEA (wind in knots)
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Last 24hrNE7NE5NW4--E5NE3NE6NE7NE7NE7NE5NE5N4E5E7NE10N10N9N10NW7NW10N10N9
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1 day agoCalmN5N5N7N8CalmCalmN3CalmN3CalmCalmW3W4NE7CalmNW5N13
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2 days agoNW4N7N8N8N6N6CalmCalmCalmCalmN5N3N3N3W4NW6NW8W8W9NW8N7N11N11N5

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Tue -- 01:12 AM PDT     9.76 feet High Tide
Tue -- 01:44 AM PDT     Moonset
Tue -- 06:13 AM PDT     Sunrise
Tue -- 08:38 AM PDT     0.53 feet Low Tide
Tue -- 04:07 PM PDT     10.45 feet High Tide
Tue -- 05:29 PM PDT     Moonrise
Tue -- 08:10 PM PDT     Sunset
Tue -- 09:21 PM PDT     6.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.39.79.68.87.45.53.41.70.70.61.42.957.18.81010.410.29.38.17.26.86.87.4

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Tue -- 01:45 AM PDT     Moonset
Tue -- 02:01 AM PDT     -1.22 knots Max Ebb
Tue -- 05:36 AM PDT     0.00 knots Slack
Tue -- 06:14 AM PDT     Sunrise
Tue -- 08:18 AM PDT     1.54 knots Max Flood
Tue -- 12:44 PM PDT     -0.05 knots Slack
Tue -- 03:10 PM PDT     -1.05 knots Max Ebb
Tue -- 05:30 PM PDT     Moonrise
Tue -- 06:45 PM PDT     0.04 knots Slack
Tue -- 08:10 PM PDT     Sunset
Tue -- 08:35 PM PDT     1.07 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-1.1-1.2-1.1-1-0.70.61.31.51.51.41.20.8-0.5-1-1.1-1-1-0.70.411.10.90.7

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (22,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.