Marine Weather and Tides
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 6:12AM||Sunset 8:12PM||Sunday August 20, 2017 1:54 PM PDT (20:54 UTC)||Moonrise 3:51AM||Moonset 6:43PM||Illumination 2%|
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|PZZ135 Puget Sound And Hood Canal- 858 Am Pdt Sun Aug 20 2017 |
Today..N wind to 10 kt. Wind waves 1 ft or less.
Tonight..NE wind to 10 kt. Wind waves 1 ft or less.
Mon..N wind to 10 kt. Wind waves 1 ft or less. Patchy fog in the morning.
Mon night..N wind to 10 kt. Wind waves 1 ft or less.
Tue..Light wind becoming nw to 10 kt in the afternoon. Wind waves 1 ft or less.
Tue night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Wed..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
Thu..SE wind to 10 kt becoming nw. Wind waves 1 ft or less.
|PZZ100 858 Am Pdt Sun Aug 20 2017 |
Synopsis for the northern and central washington coastal and inland waters..A typical august pattern will prevail through the middle of next week. Expect onshore flow of varying strength to persist due to high pres offshore and lower pres east of the cascades. A weak system will approach the coastal waters on Wednesday and move inland Thursday.
7 Day Forecast for Marine Location Near Normandy Park, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 201522|
area forecast discussion
national weather service seattle wa
822 am pdt Sun aug 20 2017
Synopsis A system passing to the north of washington will bring
high clouds at times today and some lower clouds to the coast
this morning. High pressure will build over the region Monday giving
warm temperatures and dry conditions with only patchy morning fog
in the interior; clouds will be more extensive along the
immediate coastline. Dry and warm conditions will dominate on
Tuesday. An upper trough will bring clouds, a chance of showers,
and cooler temperatures late Wednesday through Thursday. Dry and
warmer weather will return to the area Friday and continue through
Short term A weak system passing through british columbia today
will bring occasional high clouds to the area. Temperatures will
be seasonally mild with highs in the 70s in the interior. The high
level moisture is expected to dissipate this evening as upper
level ridging to the west of the area amplifies and approaches the
region. Good radiational cooling is expected tonight with colder
locations dropping into the upper 40s and areas along the urban
i-5 corridor into the mid 50s.
The problem of the day concerns the forecast for Monday morning's
solar eclipse viewing. Latest mesoscale models show shallow
moisture near the surface, that with good radiational cooling and
subsidence to the east of the incoming ridge may result in the
formation of some fog, especially near bodies of water and in the
typically foggier river valleys. Statistical guidance is now
showing a period between 6 am and 9 or 10 am where the fog could
occur in places like seattle, everett, and tacoma. At this time
it appear that any fog or stratus that occurs in the interior
during the morning hours would be shallow and lift early, but with
decreased insolation due to the eclipse, the fog may have a bit
harder time dissipating. A morning update was issued to increase
cloud cover Monday morning around the strait of juan de fuca and
through the chehalis gap into the south puget sound region and to
include patchy fog over and around bodies of water and in more
typical foggy locations. We will likely need to further fine tune
the morning fog and stratus forecast.
The offshore upper ridge will move across the area Monday
afternoon and evening then move well east into western montana
Tuesday afternoon. After another dry and warm day on Tuesday,
onshore pressure gradients will increase ushering in marine air
for cooler and cloudier conditions Tuesday night into Wednesday.
Long term From the previous long term discussion: a trough
will approach the region on Wednesday. 500 mb heights will fall
and onshore flow will increase. Expect high temperatures to cool
off several degrees with a spotty light showers by afternoon,
mainly near the coast and mountains. Models bring the main 500 mb
trough axis across the area Thursday with the best chance of
showers at that time. Orographics should produce light measurable
rainfall or showers along west facing slopes of the cascades and
olympics. Measurable rain will be more hit and miss across the
lowlands and amounts will generally be under a tenth of an inch.
High pressure builds Friday through the weekend. Dry weather returns
along with a gradual warming trend. Highs will reach the low 80s by
Saturday and possibly the mid 80s by Sunday. Mercer
Aviation Northwest flow aloft over western washington through
tonight with upper level ridge offshore moving to the coast Monday
morning. At the surface, onshore flow will continue with high
pressure offshore and lower pressure east of the cascades.
There is a shallow marine layer along the coast, but stratus
coverage is only patchy across western washington and that will
burn off this morning. Otherwise there should be no significant
cloud cover below 12,000 ft until patchy stratus and fog forms
again late tonight.
Ksea... Northeast wind 5-10 kt backing to northwest again midday.
No significant cloud cover below 12,000 ft. Patchy stratus could
form around daybreak on Monday. Mcdonnal
Marine A typical august pattern will prevail through the
middle of the week. Expect onshore flow of varying strength to
persist due to high pressure offshore and lower pressure east of
the cascades. A weak system will approach the coastal waters on
Wednesday and move inland Thursday. Small craft advisory west
winds are likely in the central and eastern strait of juan de fuca
in the evening and early morning hours each night. Mcdonnal
Sew watches warnings advisories
Pz... Small craft advisory from 6 pm this evening to 5 am pdt Monday
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|TCMW1 - 9446482 - Tacoma Met, WA||9 mi||54 min||W 8 G 8|
|TCNW1 - 9446484 - Tacoma, WA||10 mi||54 min||66°F||56°F||1021 hPa (-0.9)|
|EBSW1 - 9447130 - Seattle, WA||14 mi||54 min||Calm G 2.9||61°F||57°F||1021.2 hPa (-0.7)|
|WPOW1 - West Point, WA||19 mi||54 min||NE 5.1 G 6||61°F||1021.3 hPa (-0.8)||56°F|
|46121||22 mi||49 min||3.9||66°F||1020.4 hPa||51°F|
|46120||25 mi||45 min||ENE 5.8||60°F||1020.5 hPa||55°F|
Wind History for Tacoma MET, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Seattle, Seattle-Tacoma International Airport, WA||3 mi||61 min||Var 5||10.00 mi||Mostly Cloudy||70°F||52°F||53%||1021.4 hPa|
|Boeing Field - King County International Airport, WA||9 mi||61 min||Var 5||10.00 mi||Fair||71°F||55°F||57%||1020.6 hPa|
|Renton Municipal Airport, WA||10 mi||61 min||NW 8||10.00 mi||Fair||71°F||54°F||55%||1020.9 hPa|
|Tacoma, Tacoma Narrows Airport, WA||15 mi||61 min||Var 4||10.00 mi||Fair||68°F||48°F||51%||1021.1 hPa|
|Tacoma / McChord Air Force Base, WA||18 mi||56 min||N 4||10.00 mi||Partly Cloudy||71°F||53°F||53%||1021.3 hPa|
|Pierce County-Thun Field, WA||21 mi||59 min||Var 3||10.00 mi||Fair||73°F||50°F||44%||1021 hPa|
|Bremerton, Bremerton National Airport, WA||23 mi||58 min||N 0||mi||Fair||72°F||50°F||46%||1022.4 hPa|
Wind History from SEA (wind in knots)
|1 day ago||S||S|
|2 days ago||W||W||SW||W||SW||W||NW||N||N||N||Calm||W||Calm||W||Calm||Calm||Calm||SW||S||W||SW||W |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Des Moines |
Click for Map
Sun -- 03:28 AM PDT 11.07 feet High Tide
Sun -- 04:51 AM PDT Moonrise
Sun -- 06:12 AM PDT Sunrise
Sun -- 10:34 AM PDT -1.78 feet Low Tide
Sun -- 05:43 PM PDT 12.15 feet High Tide
Sun -- 07:42 PM PDT Moonset
Sun -- 08:11 PM PDT Sunset
Sun -- 11:13 PM PDT 5.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Skagit Bay |
Click for Map
Sun -- 01:34 AM PDT -0.00 knots Slack
Sun -- 04:39 AM PDT -1.47 knots Max Ebb
Sun -- 04:52 AM PDT Moonrise
Sun -- 06:13 AM PDT Sunrise
Sun -- 07:53 AM PDT 0.05 knots Slack
Sun -- 10:42 AM PDT 2.00 knots Max Flood
Sun -- 02:53 PM PDT -0.08 knots Slack
Sun -- 05:32 PM PDT -1.42 knots Max Ebb
Sun -- 07:43 PM PDT Moonset
Sun -- 08:12 PM PDT Sunset
Sun -- 08:53 PM PDT 0.06 knots Slack
Sun -- 11:03 PM PDT 1.59 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of PacificNorthwest EDIT
Wind Forecast for Seattle, WA (16,3,4,5)(on/off)  Help
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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.