Marine Weather and Tides
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.
|Sunrise 5:20AM||Sunset 8:51PM||Tuesday May 23, 2017 1:51 AM PDT (08:51 UTC)||Moonrise 3:30AM||Moonset 5:12PM||Illumination 6%|
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|PZZ135 Puget Sound And Hood Canal- 900 Pm Pdt Mon May 22 2017 |
Tonight..NE wind 5 to 15 kt. Wind waves 2 ft or less.
Tue..N wind to 10 kt rising to 10 to 20 kt in the afternoon. Wind waves 1 ft or less building to 1 to 3 ft in the afternoon.
Tue night..NW wind 15 to 25 kt easing to 10 to 20 kt after midnight. Wind waves 2 to 4 ft. A slight chance of showers.
Wed..SW wind to 10 kt becoming variable in the afternoon. Wind waves 1 ft or less.
Wed night..NW wind to 10 kt becoming N after midnight. Wind waves 1 ft or less.
Thu..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Thu night..N wind to 10 kt. Wind waves 1 ft or less.
Fri..NE wind to 10 kt. Wind waves 1 ft or less.
Sat..N wind to 10 kt. Wind waves 1 ft or less.
|PZZ100 900 Pm Pdt Mon May 22 2017 |
Synopsis for the northern and central washington coastal and inland waters..A surface ridge just offshore will maintain light to moderate onshore flow tonight. An approaching upper level trough will trigger a marine push on Tuesday with very strong onshore flow developing through the strait of juan de fuca. Gale force winds are expected in the strait. Onshore flow will weaken by Wednesday morning. The surface ridge will remain just offshore Wednesday through the rest of this week allowing weak to moderate onshore flow to continue.
7 Day Forecast for Marine Location Near Dash Point, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 230404|
area forecast discussion
national weather service seattle wa
900 pm pdt Mon may 22 2017
Synopsis Strong onshore flow will develop on Tuesday with as an
upper level trough rapidly moves toward western washington. Clouds
and cooler conditions will spread into the area Tuesday. The upper
trough will weaken and shift east Thursday and an upper ridge will
arrive next weekend.
Short term An upper ridge over the region will shift inland
tonight. Low clouds will reach the coast late tonight or Tuesday
morning as onshore flow increases. An upper trough will move over
the pacific northwest on Tuesday. This will induce a strong onshore
push. The coast will be mostly cloudy but the interior will be
mostly sunny again on Tuesday with some high clouds. The main impact
from the onshore push will be too lower high temperatures 10-15
degrees on Tuesday. There will also be some windy conditions for a
few hours over the admiralty inlet area late Tuesday afternoon and
into the evening as strong west winds develop. It looks like at
least a wind advisory will eventually be needed to for this.
An upper trough and low level onshore flow will keep things mostly
cloudy on Wednesday. Clouds will likely lift and scatter a bit by
afternoon with daytime heating. There could be a few showers but
nothing significant. Highs will cool to near normal. Thursday looks
similar to Wednesday. A broad upper trough will remain over the
pacific northwest with low level onshore flow. The onshore flow will
weaken however and turn more northerly by afternoon. This should
result in more afternoon sunshine and highs warming a few degrees.
Long term Previous discussion... An upper ridge will move over the
area on Friday and remain in control into early next week. This will
bring another extended dry spell with temperatures above normal. A
few showers might bubble up over the cascades Sunday and Monday
afternoon as the ridge axis shifts slightly inland and southerly
flow aloft increases across the area. Schneider
Aviation The upper level ridge over western washington this
evening will drift E tonight. Light northerly flow aloft will
gradually become westerly overnight. At low levels high pressure
over the offshore waters will maintain moderate onshore flow
tonight. The air mass will remain dry through tonight withVFR
An approaching upper level system will help trigger a marine push
with strong onshore flow developing Tuesday morning and persisting|
through Tuesday night. The onshore flow will spread low stratus onto
the wa coast tonight and through the strait after 10z resulting in
areas of ifr conditions. Surface winds at airports near the strait
could see gusty winds particularly Tuesday afternoon and evening.
Ksea...VFR conditions with northerly winds 4-10 kt.
Marine A surface ridge just offshore will maintain moderate
onshore flow tonight with SCA conditions over the coastal waters
and in the central and E strait of juan de fuca.
An upper level trough approaching from the NW will result in a a
very strong marine push on Tuesday, with gale force westerlies
developing through the strait of juan de fuca around midday Tuesday
with peak winds of 35-45 kt possible late in the afternoon or early
evening. Gale force winds are also expected to spread into the north
interior and admiralty inlet Tuesday afternoon and evening. This
system will also support solid northwesterlies over the offshore and
coastal waters, resulting in SCA winds and seas through Tuesday
night as well as a steep fresh swell that will affect the coastal
waters through Wednesday night. Onshore flow will ease late Tuesday
night and linger through Friday.
Pz... Small craft advisory from 6 pm this evening to 5 am pdt
Wednesday for coastal waters from CAPE flattery to james
island 10 to 60 nm-coastal waters from CAPE flattery to
james island out 10 nm-coastal waters from james island to
point grenville 10 to 60 nm-coastal waters from james
island to point grenville out 10 nm-coastal waters from
point grenville to CAPE shoalwater 10 to 60 nm-coastal
waters from point grenville to CAPE shoalwater out 10 nm.
Small craft advisory from 6 pm this evening to 9 am pdt Tuesday
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.
Gale warning from 9 am Tuesday to 5 am pdt Wednesday for central
u.S. Waters strait of juan de fuca-east entrance u.S.
Waters strait of juan de fuca.
Gale warning from 2 pm Tuesday to 2 am pdt Wednesday for
admiralty inlet-northern inland waters including the san
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|
|TCNW1 - 9446484 - Tacoma, WA||5 mi||52 min||63°F||50°F||1016.7 hPa (-0.6)|
|TCMW1 - 9446482 - Tacoma Met, WA||5 mi||52 min||W 1 G 2.9|
|EBSW1 - 9447130 - Seattle, WA||18 mi||52 min||Calm G 1.9||58°F||51°F||1016.6 hPa (-1.0)|
|46121||18 mi||1415 min||5.8||61°F||1015.7 hPa||52°F|
|WPOW1 - West Point, WA||22 mi||52 min||NE 5.1 G 5.1||59°F||1016.6 hPa (-0.9)||51°F|
|46120||29 mi||43 min||WSW 3.9||56°F||1015.8 hPa||53°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||8 mi||59 min||NNE 9||10.00 mi||Fair||68°F||48°F||49%||1017.2 hPa|
|Tacoma, Tacoma Narrows Airport, WA||11 mi||59 min||N 3||10.00 mi||Fair||62°F||46°F||58%||1016.7 hPa|
|Tacoma / McChord Air Force Base, WA||13 mi||1.9 hrs||N 0||10.00 mi||Fair||61°F||52°F||75%||1017.2 hPa|
|Seattle, Seattle Boeing Field, WA||14 mi||59 min||N 0||10.00 mi||Fair||65°F||51°F||61%||1016.5 hPa|
|Renton, Renton Municipal Airport, WA||14 mi||59 min||NW 6||10.00 mi||Fair||65°F||54°F||68%||1016.9 hPa|
|Pierce County-Thun Field, WA||17 mi||77 min||N 0||10.00 mi||57°F||55°F||94%||1017.3 hPa|
|Fort Lewis / Gray U. S. Army Airfield, WA||20 mi||1.9 hrs||Var 1||7.00 mi||Fair||60°F||50°F||71%||1017.8 hPa|
|Bremerton, Bremerton National Airport, WA||22 mi||56 min||N 0||10.00 mi||Fair||53°F||48°F||83%||1018.5 hPa|
Wind History from SEA (wind in knots)
|1 day ago||NE||Calm||N||Calm||N||Calm||NE||W||NW||N||N||N||N||N||N||N||N||N||N||N||N||N||NE||NE|
|2 days ago||Calm||W||SW||W||Calm||Calm||SW||S||Calm||W||N||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Des Moines |
Click for Map
Tue -- 03:01 AM PDT 11.92 feet High Tide
Tue -- 04:29 AM PDT Moonrise
Tue -- 05:23 AM PDT Sunrise
Tue -- 10:00 AM PDT 0.01 feet Low Tide
Tue -- 04:33 PM PDT 10.40 feet High Tide
Tue -- 06:11 PM PDT Moonset
Tue -- 08:49 PM PDT Sunset
Tue -- 10:00 PM PDT 4.66 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|The Narrows |
Click for Map
Tue -- 12:55 AM PDT 3.12 knots Max Flood
Tue -- 03:53 AM PDT -0.00 knots Slack
Tue -- 04:30 AM PDT Moonrise
Tue -- 05:24 AM PDT Sunrise
Tue -- 07:39 AM PDT -5.03 knots Max Ebb
Tue -- 10:48 AM PDT 0.01 knots Slack
Tue -- 01:40 PM PDT 3.95 knots Max Flood
Tue -- 05:13 PM PDT -0.00 knots Slack
Tue -- 06:12 PM PDT Moonset
Tue -- 08:26 PM PDT -3.51 knots Max Ebb
Tue -- 08:49 PM PDT Sunset
Tue -- 11:08 PM PDT 0.01 knots Slack
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 (4,6,7,8)(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.