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 9:01PM||Thursday May 24, 2018 7:02 AM PDT (14:02 UTC)||Moonrise 2:44PM||Moonset 2:35AM||Illumination 73%|
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|PZZ130 West Entrance U.s. Waters Strait Of Juan De Fuca- 205 Am Pdt Thu May 24 2018 |
Today..SW wind to 10 kt becoming W 5 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 6 ft at 11 seconds. Isolated showers in the morning.
Tonight..W wind 15 to 20 kt becoming 10 to 20 kt after midnight. Wind waves 1 to 3 ft. W swell 6 ft at 11 seconds.
Fri..W wind 10 to 20 kt rising to 15 to 25 kt in the afternoon. Wind waves 2 to 4 ft. W swell 5 ft at 10 seconds.
Fri night..W wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 2 ft or less after midnight. W swell 5 ft at 10 seconds.
Sat..W wind to 10 kt rising to 15 to 25 kt in the afternoon. Wind waves 1 ft or less building to 2 to 4 ft in the afternoon. W swell 4 ft at 9 seconds.
Sat night..W wind 10 to 20 kt becoming sw to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less after midnight. W swell 4 ft at 10 seconds.
Sun..W wind 5 to 15 kt. Wind waves 2 ft or less. W swell 4 ft building to 6 ft.
Mon..W wind 10 to 20 kt rising to 15 to 25 kt. Wind waves 2 to 4 ft. W swell 6 ft.
|PZZ100 205 Am Pdt Thu May 24 2018 |
Synopsis for the northern and central washington coastal and inland waters..High pressure offshore combined with lower pressure inland will give strong onshore flow through the weekend. NEar gale to gale conditions are expected, mainly during the late afternoon and overnight hours, over the eastern two thirds of the strait of juan de fuca. Small craft advisory conditions are expected during the late afternoon and overnight hours over the inland waters near the east entrance to the strait of juan de fuca, and over the southern third of the washington coastal waters.
7 Day Forecast for Marine Location Near Sekiu, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 241033|
area forecast discussion
national weather service seattle wa
333 am pdt Thu may 24 2018
Synopsis High pressure aloft will shift east tonight. Look for
an approaching low pressure system on Friday to move across the
area Friday night. The main impact will be a deeper marine layer
and stronger onshore flow, leading to a few degrees of cooling on
Saturday. The outlook for the rest of the memorial day weekend
calls for dry weather with slightly above normal temperatures.
There were a few showers, some briefly heavy, over the CWA at
this time. Expect the shower threat to persist this morning before
ending this afternoon as drier air and subsidence sets in.
Meanwhile, the marine layer deepened overnight, thanks to strong
low level onshore flow. This allowed stratus to surge inland. Much
of the lowlands will be blanketed by a solid low overcast by
sunrise. The clouds will burn off over most areas this afternoon.
Max temps across the interior lowlands will be 5-10 degrees
cooler, on average, than yesterday.
An upper level ridge will prevail over the region today before
shifting east tonight, allowing an upper level trof to approach
from the northwest. This system will move across the region
Friday night. The main impacts from this system will be a
deepening layer and a stronger onshore pressure gradient, which
will lead to additional cooling on Saturday. There will also be a
threat of light showers over the cascades, near the crest, Friday
afternoon and evening as the upper trof approaches. Otherwise,
anticipate patchy light drizzle on the lowlands, especially on
the coast and parts of the puget sound region, late Friday night
through Saturday morning.
Temperatures during this period (Thursday-Saturday) will be near
or slightly above normal.
High pressure aloft or nearly zonal flow aloft will prevail over
the region Sunday and memorial day. This combined with weaker
surface onshore flow will result in temps being a few degrees
Beyond memorial day, confidence in the forecast was not high due
to timing differences in the medium range models concerning a
strong upper level trof. This trof may impact the pacific
northwest about the middle of next week. Have chosen to
compromise between the slower (gfs canadian) and faster (ecmwf)
solutions. With that in mind, anticipate the upper level trof to
approach the region on Tuesday and initiate a marine push.
Cloudier and cooler conditions, along with a chance of showers,
are anticipated on Wednesday. Temps on Wednesday are currently
forecast to be below normal. The snow levels are forecast to
lower into 5500 (west) to 7500 feet (east) range.
Aviation Stratus surging inland early this morning with
ceilings in the 1000-1500 foot range with local areas of ceilings
below 1000 feet. Ceilings will begin to improve mid morning with the
ceilings below 1000 feet gone by 18z. Ceilings in the 1500-2500 foot
range with scatter out over the interior in the 19z-21z time frame.
MVFR ceilings will continue along the coast. Ceilings in the 1000-
2000 foot range will redevelop between 08z and 12z overnight.
Ksea... Ceilings below 1000 feet early this morning lifting to 1000-
2000 feet around 16z. Ceilings scattering out early this afternoon
with MVFR ceilings once again early Friday morning. Southwest wind 4
to 8 knots becoming northwesterly late in the afternoon through the
evening hours. Felton
Marine Strong onshore continues this morning with high pressure
offshore and lower pressure inland and east of the cascades.
A slight decrease in onshore flow this afternoon and tonight as
compared to Wednesday night will likely result in winds that are
a few knots lighter over the inland waters. However, an increased
northwesterly pressure gradient will give small craft advisory
conditions to the southern third of the washington coastal waters
late this afternoon and tonight.
Onshore flow is expected to increase Friday afternoon and evening
as an upper level feature moves across the region. Winds are
likely to reach gale force again over the eastern two thirds of
the strait of juan de fuca during the late afternoon and overnight
hours, and small craft advisory conditions are expected over most
of the remaining waters except for puget sound and hood canal.
The rather strong onshore flow pattern is expected to persist over
the weekend. Albrecht
Sew watches warnings advisories
Pz... Small craft advisory from 5 pm this afternoon to 6 am pdt Friday
for 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 4 pm this afternoon to 4 pm pdt Friday
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.
Gale warning until 7 am pdt this morning for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.
Small craft advisory until 7 am pdt this morning for northern
inland waters including the san juan islands.
Small craft advisory from 4 pm this afternoon to 4 am pdt Friday
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|
|NEAW1 - 9443090 - Neah Bay, WA||19 mi||45 min||53°F||1016.6 hPa|
|46087 - Neah Bay, WA (Traffic Separation Lighted Buoy)||27 mi||73 min||WSW 5.8 G 9.7||51°F||51°F||8 ft||1016.8 hPa (+1.0)||51°F|
|LAPW1 - 9442396 - La Push, WA||36 mi||87 min||49°F||1016.8 hPa|
|PTAW1 - 9444090 - Port Angeles, WA||45 mi||87 min||4.1 G 5.1||53°F||51°F||1015.9 hPa|
|DESW1 - Destruction Island, WA||48 mi||63 min||51°F||1017 hPa (+0.8)|
Wind History for Neah Bay, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Quillayute, Quillayute State Airport, WA||31 mi||70 min||WNW 4||10.00 mi||Overcast||51°F||50°F||96%||1016.7 hPa|
Wind History from UIL (wind in knots)
|1 day ago||NW||SW||W||W||W||W||NW||NW||NW||NW||NW||NW||Calm||Calm||Calm||Calm||NW||N||N||N|
|2 days ago||Calm||NW||N||W|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Thu -- 03:35 AM PDT Moonset
Thu -- 04:44 AM PDT 2.74 meters Low Tide
Thu -- 05:27 AM PDT Sunrise
Thu -- 10:05 AM PDT 3.57 meters High Tide
Thu -- 03:44 PM PDT Moonrise
Thu -- 04:15 PM PDT 2.49 meters Low Tide
Thu -- 09:01 PM PDT Sunset
Thu -- 10:55 PM PDT 4.19 meters High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Strait of Juan de Fuca Entrance |
Click for Map
Thu -- 12:46 AM PDT -0.00 knots Slack
Thu -- 03:37 AM PDT Moonset
Thu -- 04:59 AM PDT -1.75 knots Max Ebb
Thu -- 05:27 AM PDT Sunrise
Thu -- 09:32 AM PDT 0.00 knots Slack
Thu -- 11:21 AM PDT 0.39 knots Max Flood
Thu -- 01:14 PM PDT -0.00 knots Slack
Thu -- 03:46 PM PDT Moonrise
Thu -- 05:12 PM PDT -1.27 knots Max Ebb
Thu -- 08:56 PM PDT 0.00 knots Slack
Thu -- 09:03 PM PDT Sunset
Thu -- 11:16 PM PDT 0.63 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 (10,2,3,4)(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.