Marine Weather and Tides
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
|Sunrise 5:20AM||Sunset 8:54PM||Friday May 25, 2018 9:20 PM PDT (04:20 UTC)||Moonrise 3:46PM||Moonset 2:54AM||Illumination 86%|
EDIT (on/off)  Help
|PZZ135 Puget Sound And Hood Canal- 817 Pm Pdt Fri May 25 2018 |
Tonight..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Sat..SW wind to 10 kt. Wind waves 1 ft or less.
Sat night..N wind to 10 kt. Wind waves 1 ft or less.
Sun..Light wind becoming sw to 10 kt in the afternoon. Wind waves 1 ft or less.
Sun night..NW wind to 10 kt becoming variable after midnight. Wind waves 1 ft or less.
Mon..Light wind. Wind waves less than 1 ft.
Mon night..NW wind to 10 kt. Wind waves 1 ft or less.
Tue..Light wind becoming variable 5 to 15 kt. Wind waves 2 ft or less.
Wed..SW wind 5 to 15 kt becoming variable. Wind waves 2 ft or less.
|PZZ100 817 Pm Pdt Fri May 25 2018 |
Synopsis for the northern and central washington coastal and inland waters..Moderate to occasionally strong onshore flow will continue through the memorial day weekend and into the middle of next week. This will lead to near gale or gale force winds over the central and eastern strait of juan de fuca, mainly during the late afternoon through overnight hours each day. The strongest onshore flow is expected this evening.
7 Day Forecast for Marine Location Near Purdy, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 260317|
area forecast discussion
national weather service seattle wa
817 pm pdt Fri may 25 2018
Synopsis High pressure offshore and lower pressure inland is
giving strong onshore flow. The onshore flow will bring clouds
into the area later tonight into Saturday morning along with
areas of drizzle or light rain. Onshore flow will decrease
somewhat Sunday into memorial day resulting in less night and
morning clouds. An upper level trough will give an increase in
clouds, cooler temperatures, and a slight chance of showers toward
the middle to end of next week.
Short term Clouds have been hanging tough over the central
portions of puget sound this evening and over the cascades.
Elsewhere, clouds have cleared out today giving nice conditions.
With rather strong onshore flow this evening, expect clouds to
fill in quickly after 06z, short term models, particularly the
nam12, show some very light rain or drizzle forming along the
coast and possibly in an area of convergence over the central
puget sound area later tonight into early Saturday as the marine
layer deepens to over 5000 ft and upward vertical motion within
the moist layer develops in response to the passage of a weak
upper level trough.
The upper trough moving across the area tonight will move well
east of the area by Saturday afternoon resulting in rebounding 500
mb heights across western washington. With the marine air in
place, temperatures will rise into the 60s across the area.
However, it is expected to clear out during the afternoon hours
and onshore pressure gradients Saturday evening are expected to be
much lower than they are this evening.
Expect fewer marine clouds Saturday night and Sunday. With
sunshine, temperatures on Sunday will rise into the mid 60s along
the coast and into the lower to mid 70s inland. The warming trend
will be short-lived however as onshore flow increases again Sunday
night and marine air moves back inland late Sunday night into
Current forecasts are in good shape. No updates are required.
Long term From the previous long term discussion: Tuesday
looks similar to Monday. Something of a change in the patten
occurs for the Wednesday through Friday period, as an upper trough
sets up over the region. Heights will be lower, and there will be
a chance of showers at times. Currently the best shot at a little
rain are Wednesday and again Thursday night. Highs will be in the
60s all three days. Burke
Aviation A weak upper level trough will move across western|
washington this evening. This will help to maintain, or even
strengthen, onshore flow tonight and deepen the moist and stable
marine layer. Expect clouds to fill in between 06z and 09z tonight
with fairly widespread coverage of CIGS at or below 020 later
tonight into Saturday morning. Lift within the deepening marine
layer will produce areas of drizzle or light rain along the coast
and in the central puget sound lowlands, and the drizzle may cause
local ifr conditions in reduced CIGS and visbys.
Moderate southwest flow aloft will become light northwesterly
late tonight. Above the marine layer, the air mass will be dry and
Conditions will improve toVFR around 18z Saturday withVFR
conditions continuing throughout the area through Saturday night.
ksea... The above discussion applies. North wind this evening will
turn southerly 4-7 kt by or shortly after 06z this evening.
MVFR CIGS will fill in between 07z and 09z with CIGS below 020
expected. 3-5sm -dz is possible 09z-15z. Clouds will lift and
scatter by 21z Saturday. Albrecht
Marine Moderate to strong onshore flow tonight is giving gales
to the central and eastern portions of the strait of juan de fuca
and small craft advisory conditions to admiralty inlet and the
northern inland waters adjacent to the east entrance. The onshore
flow and wind will gradually relax late tonight into Saturday
morning. Sea breeze produced small craft advisory conditions over
the near-shore coastal waters near grays harbor will relax after 9
Onshore flow will weaken Saturday through midday Sunday as high
pressure builds into the waters. But diurnally driven sea breezes
will result in small craft advisory conditions in portions of the
strait during the late afternoon and overnight hours on Saturday.
Onshore pressure gradients are expected to increase once again
Sunday afternoon and evening. Gales are possible any evening from
Sunday through Wednesday. Albrecht
Sew watches warnings advisories
Pz... Small craft advisory until 9 pm pdt this evening for coastal
waters from point grenville to CAPE shoalwater out 10 nm-
west entrance u.S. Waters strait of juan de fuca.
Gale warning until 3 am pdt Saturday for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.
Small craft advisory until 3 am pdt Saturday for admiralty inlet-
northern inland waters including the san juan islands.
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|
|46121||11 mi||48 min||61°F||1016.8 hPa||45°F|
|TCMW1 - 9446482 - Tacoma Met, WA||12 mi||51 min||W 6 G 8|
|TCNW1 - 9446484 - Tacoma, WA||13 mi||51 min||62°F||51°F||1016.9 hPa|
|EBSW1 - 9447130 - Seattle, WA||19 mi||51 min||NNW 2.9 G 5.1||63°F||53°F||1016.6 hPa|
|WPOW1 - West Point, WA||20 mi||81 min||NNE 9.9 G 11||57°F||1016.4 hPa (+0.0)||49°F|
|46120||27 mi||47 min||SE 5.8||57°F||1016.2 hPa||49°F|
|46125||35 mi||43 min||7.8||56°F||1016.2 hPa||46°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
|Tacoma, Tacoma Narrows Airport, WA||9 mi||28 min||SSW 4||10.00 mi||Overcast||59°F||41°F||51%||1017.5 hPa|
|Bremerton, Bremerton National Airport, WA||11 mi||25 min||N 0||10.00 mi||Overcast||59°F||48°F||67%||1018.8 hPa|
|Seattle, Seattle-Tacoma International Airport, WA||15 mi||28 min||WNW 3||10.00 mi||Overcast||62°F||43°F||50%||1017.5 hPa|
|Boeing Field - King County International Airport, WA||17 mi||28 min||Var 4||10.00 mi||Overcast||63°F||44°F||50%||1016.5 hPa|
|Tacoma / McChord Air Force Base, WA||17 mi||83 min||W 7||10.00 mi||Partly Cloudy||62°F||44°F||51%||1017 hPa|
|Renton Municipal Airport, WA||20 mi||28 min||N 3||10.00 mi||Overcast||63°F||48°F||58%||1016.9 hPa|
|Fort Lewis / Gray U. S. Army Airfield, WA||21 mi||83 min||WSW 9||10.00 mi||Partly Cloudy||62°F||45°F||54%||1017 hPa|
Wind History from TIW (wind in knots)
|1 day ago||SW||SW||S||S||SW||SW||S||SW||S||S||SW||W||SW||W||W||W||W||W||SW||S||Calm|
|2 days ago||N||NE||N||NW||Calm||W||NW||E||Calm||W||W||Calm||SE||W||Calm||SW||SW||SW||SW||W||W||SW |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Sat -- 03:36 AM PDT 13.39 feet High Tide
Sat -- 04:20 AM PDT Moonset
Sat -- 05:22 AM PDT Sunrise
Sat -- 10:42 AM PDT 0.46 feet Low Tide
Sat -- 05:11 PM PDT 11.25 feet High Tide
Sat -- 05:53 PM PDT Moonrise
Sat -- 08:53 PM PDT Sunset
Sat -- 10:34 PM PDT 4.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Skagit Bay |
Click for Map
Sat -- 01:35 AM PDT -0.00 knots Slack
Sat -- 04:19 AM PDT Moonset
Sat -- 04:27 AM PDT -2.25 knots Max Ebb
Sat -- 05:21 AM PDT Sunrise
Sat -- 08:00 AM PDT 0.00 knots Slack
Sat -- 10:33 AM PDT 2.46 knots Max Flood
Sat -- 02:33 PM PDT -0.08 knots Slack
Sat -- 05:01 PM PDT -2.01 knots Max Ebb
Sat -- 05:53 PM PDT Moonrise
Sat -- 08:20 PM PDT 0.06 knots Slack
Sat -- 08:53 PM PDT Sunset
Sat -- 10:39 PM PDT 2.23 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Seattle, WA (0,6,7,8)(on/off)  Help
Ad by Google
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.