Marine Weather and Tides
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 5:12AM||Sunset 9:11PM||Saturday June 24, 2017 3:31 AM PDT (10:31 UTC)||Moonrise 5:09AM||Moonset 8:44PM||Illumination 0%|
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|PZZ135 Puget Sound And Hood Canal- 256 Am Pdt Sat Jun 24 2017 |
Today..N wind 5 to 15 kt. Wind waves 2 ft or less.
Tonight..N wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..N wind to 10 kt. Wind waves 1 ft or less.
Sun night..N wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Mon..S wind to 10 kt becoming sw in the afternoon. Wind waves 2 ft or less.
Mon night..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Tue..SW wind 5 to 15 kt becoming variable. Wind waves 2 ft or less.
Wed..S wind to 10 kt. Wind waves 1 ft or less.
|PZZ100 256 Am Pdt Sat Jun 24 2017 |
Synopsis for the northern and central washington coastal and inland waters..Weak offshore flow will prevail until Sunday morning, with a diurnal pickup in northerly gradients this afternoon and evening. Onshore flow will begin on Sunday afternoon and persist through next week. Onshore flow will become strong for a time on Monday evening.
7 Day Forecast for Marine Location Near Federal Way, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 240959|
area forecast discussion
national weather service seattle wa
259 am pdt Sat jun 24 2017
Synopsis High pressure aloft and low level offshore flow will
bring record breaking high temperatures to the area this weekend.
The upper level ridge will move east on Sunday with the low level
flow turning onshore late in the day cooling the coast down a few
degrees. Sunday will be the warmest day in the interior. Onshore
flow will strengthen Monday with temperatures cooling back to near
normal with some night and morning clouds. Temperatures will warm
a bit later next week as high pressure aloft rebuilds over the
Short term The heat is on. Satellite imagery shows there is not
a cloud in the sky over western washington early this morning.
With the clear skies a wide range of temperatures at 2 am, near 50
in the san juan islands to the mid 60s in the seattle area.
Record breaking high temperatures this weekend. The heat advisory
from the seattle area southward including the foothills will
remain in effect. Upper level ridge over western washington
today. Thermally induced surface trough expanding north along the
oregon coast today reaching the washington coast later this
afternoon into this evening. Surface gradients are already
offshore for the most part. Only the cross cascades gradients are
slightly positive at 09z 2am this morning but they are also
trending toward offshore. Temperatures aloft warming with model
850 mb temperatures ending up near plus 20c by 00z Sunday. Winds
at 850 mb and 925 mb also turning easterly today. End result
record breaking high temperatures along the coast today with a few
record highs over the interior. High temperatures in the 90s will
be common from about seattle southward and along the coast. North
of seattle highs will mostly be in the 80s with some 70s right
near the water.
Little change in the pattern tonight. Lows will be warm in the
seattle metro area with a record high minimum temperature possible
Sunday morning ( record 62 in 2006 ) as temperatures only drop
into the lower to mid 60s. For the remainder of the area 50s will
Small changes to the pattern on Sunday. The upper level ridge
over western washington shifts into eastern washington. The
thermally induced surface trough moves inland during the afternoon
with the low level flow turning onshore along the coast. High
temperatures will be tricky for the coast with a couple hour
difference in the transition to onshore flow meaning a 5 to 10
degree difference in the high temperature. With the thermally
induced surface trough still near the coast in the morning will
only go for 5 to 10 degrees of cooling leaving highs in the 80s.
For the interior Sunday will be the warmest day with model 850 mb
temperatures a couple of degrees warmer versus Saturday. With the
thermally induced trough over the area in the afternoon surface
gradients winds will be light. Expect up to 5 degrees of warming
versus Saturday's highs for the interior with the hottest
locations in the southwest interior push 100 degrees. Highs
elsewhere will range from the mid 80s to mid 90s. Record highs are
forecast for all of the climate stations in western washington on
Sunday. The forecast high of 95 degrees in seattle is just one
degree short of the all-time warmest june day ( see climate
section below ).
Onshore flow increasing Sunday night and continuing into Monday.
Upper level ridge well to the east. The resulting push of marine
air Sunday night into Monday morning will bring clouds to the
coast with the low clouds making as far as the seattle area. The
clouds will burn off over the interior in the afternoon. Even with
the sunshine the transition to low level onshore flow will cool
high temperatures on Monday for the interior as much as 25
degrees with 70s common across the area.
Long term Extended models in good agreement with low level
onshore flow continuing through the period. Weak trofiness over
the area into Thursday before 500 mb heights start to increase as
an upper level ridge begins to build offshore. High temperature
near normal into Thursday with highs in the 60s to mid 70s.
Temperatures warming a few degrees on Friday with highs in the
upper 60s to near 80. Felton
Aviation A strong upper level ridge axis is off the coast early
this morning, and it will move east across western washington
late today. Moderate northwest flow aloft will become light this
afternoon, and weak low-level northerly offshore flow will prevail.
The air mass will be dry and stable through today, then some mid-
level instability will develop tonight. Clear skies throughout
western washington through Saturday night.
Ksea... Clear skies and northerly flow through the next 30 hours.
Marine A weak thermal pressure trough is located along the
washington coast this morning. It will remain in place until
Sunday morning, maintaining weak northerly and offshore winds. A
diurnal pickup in northerly wind is expected this afternoon, with
localized winds in excess of 21 knots over the coastal waters this
A turn to onshore flow will occur on Sunday afternoon. By Monday
evening, onshore flow will be strong, with westerly gales possible
in the strait. Moderate onshore flow will then continue for much
of next week. Haner
Climate The last time seattle had back to back 90 degree plus
days in june was june 28th and 29th, 2008. Since records started
at seattle-tacoma airport in 1945 there have only been 2 days with
highs 95 degrees or more in june, june 30th 1995 and june 9th,
1955. Both days the high was 96 degrees.
Sew watches warnings advisories
Wa... Heat advisory from noon today to 9 pm pdt Sunday for bellevue
and vicinity-bremerton and vicinity-east puget sound
lowlands-hood canal area-seattle and vicinity-southwest
Pz... Small craft advisory from 3 pm this afternoon to 10 pm pdt this
evening 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.
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||6 mi||50 min||62°F||53°F||1020.7 hPa|
|TCMW1 - 9446482 - Tacoma Met, WA||6 mi||44 min||Calm G 1.9|
|EBSW1 - 9447130 - Seattle, WA||19 mi||44 min||S 1 G 1.9||60°F||53°F||1020.7 hPa|
|46121||21 mi||35 min||5.8||57°F||1019.6 hPa||51°F|
|WPOW1 - West Point, WA||23 mi||32 min||NE 8 G 8.9||58°F||1020.9 hPa (+0.0)||50°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||39 min||NNE 5||10.00 mi||Fair||64°F||46°F||54%||1021.3 hPa|
|Tacoma, Tacoma Narrows Airport, WA||13 mi||39 min||N 0||10.00 mi||Fair||57°F||48°F||72%||1020.7 hPa|
|Renton Municipal Airport, WA||13 mi||39 min||N 0||10.00 mi||Fair||63°F||54°F||73%||1021 hPa|
|Tacoma / McChord Air Force Base, WA||14 mi||34 min||S 4||10.00 mi||Fair||50°F||49°F||99%||1020.9 hPa|
|Boeing Field - King County International Airport, WA||14 mi||39 min||N 0||10.00 mi||Fair||64°F||50°F||60%||1020.5 hPa|
|Pierce County-Thun Field, WA||16 mi||37 min||N 0||10.00 mi||Fair||54°F||53°F||100%||1021 hPa|
|Fort Lewis / Gray U. S. Army Airfield, WA||21 mi||34 min||E 3||10.00 mi||Fair||53°F||50°F||89%||1020.9 hPa|
Wind History from SEA (wind in knots)
|1 day ago||Calm||N||N||N||N||N||NE||NE||N||NE|
|2 days ago||NE||NE||NE||NE||NE||NE||N||NW||N||NW||W||NW||W||N||NE||N||N||N||N||N||NE||NE||NE |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Des Moines |
Click for Map
Sat -- 04:33 AM PDT 11.95 feet High Tide
Sat -- 05:13 AM PDT Sunrise
Sat -- 06:08 AM PDT Moonrise
Sat -- 11:50 AM PDT -3.49 feet Low Tide
Sat -- 07:09 PM PDT 12.81 feet High Tide
Sat -- 09:10 PM PDT Sunset
Sat -- 09:43 PM PDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Skagit Bay |
Click for Map
Sat -- 02:32 AM PDT -0.07 knots Slack
Sat -- 05:14 AM PDT Sunrise
Sat -- 05:55 AM PDT -1.61 knots Max Ebb
Sat -- 06:09 AM PDT Moonrise
Sat -- 08:55 AM PDT 0.00 knots Slack
Sat -- 11:57 AM PDT 2.19 knots Max Flood
Sat -- 04:07 PM PDT -0.00 knots Slack
Sat -- 06:46 PM PDT -1.47 knots Max Ebb
Sat -- 09:10 PM PDT Sunset
Sat -- 09:44 PM PDT Moonset
Sat -- 10:01 PM PDT 0.06 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 (6,6,7,8)(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.