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 5:15AM||Sunset 8:57PM||Monday May 29, 2017 8:07 AM PDT (15:07 UTC)||Moonrise 8:37AM||Moonset 11:43PM||Illumination 17%|
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|PZZ135 Puget Sound And Hood Canal- 300 Am Pdt Mon May 29 2017 |
Today..S wind 5 to 15 kt becoming variable. Wind waves 2 ft or less.
Tonight..NW wind 5 to 15 kt becoming s. Wind waves 2 ft or less. A slight chance of showers.
Tue..S wind 5 to 15 kt. Wind waves 2 ft or less. A chance of showers or tstms.
Tue night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Wed..S wind 10 kt or less becoming nw. Wind waves 1 ft or less.
Wed night..NW wind 5 to 15 kt becoming s. Wind waves 2 ft or less.
Thu..S wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..Variable wind 5 to 15 kt. Wind waves 2 ft or less.
|PZZ100 300 Am Pdt Mon May 29 2017 |
Synopsis for the northern and central washington coastal and inland waters..High pres offshore along with lowering pres E of the cascades will result in strengthening onshore flow through tonight. The flow will weaken Tue as the offshore high shifts east...eventually reaching the washington coast Tue evening. Light onshore flow will prevail on Wed.
7 Day Forecast for Marine Location Near Kent, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 291111|
area forecast discussion
national weather service seattle wa
411 am pdt Mon may 29 2017
Synopsis Onshore flow will increase through Tuesday as upper
ridging exits to the east. Marine moisture, in the form of low
clouds will push further inland and persist longer each day. An
upper trough and southerly flow aloft will bring an increasing
chance of showers and a few thunderstorms, mainly Tuesday and
Tuesday night. Weak weather disturbances will keep clouds and a
chance of showers in the forecast through the end of the week
Short term This weekend's warm and dry upper ridge will exit
east today toward the northern rockies, with increasing southwest
flow aloft. This has already opened the door to cooler marine air
spreading inland overnight, along with low marine clouds. ASOS obs
and derived fog imagery show low clouds have already pushed inland
through the strait to near pae, and up from the southwest to pwt
and sea. By sunrise, marine clouds should fill in further over the
lowlands. As a result of the well-defined albeit shallow marine
air, today's afternoon temperatures will be down 10 or more
degrees over the puget sound lowlands from Sunday. Otherwise, a
few showers may pop up this afternoon over the cascade crest and
the interior of the olympic mtns, but weak wind profiles and
plenty of convective inhibition suggests that any showers will be
short-lived, just a quick pulse.
On Tuesday, we will be eyeing a disturbance that will swing up
from the southwest. Mid-level lapse rates will steepen with the
approach of this feature, with large-scale lift helping showers to
blossom over western washington on Tuesday. The marine layer will
deepen, and marine clouds are likely to be stubborn, leading to a
cool day with below normal temperatures. Owing to a cool and
stable boundary layer but unstable mid-levels, convection on
Tuesday will be elevated, instead of surface-based. The mid-level
wind profile will have quite a bit of directional and speed shear,
so some organization into a few clusters of thunderstorms seems
plausible. The focus of any thunderstorms will shift from the
olympic peninsula late in the morning to the cascades by early tue
evening, passing across the seattle metro area during the
afternoon. With low-hanging marine clouds, sky watchers will not
be able to see the convective clouds above.
An upper low off the b.C. Coast and w-sw flow aloft will continue
to deepen the marine air on Wednesday. Precip chances go down on
wed due to less large-scale lift, but orographic lift with the
onshore flow pattern and moist boundary layer could lead to a few
light showers. Haner
Long term Thursday and Friday will feature onshore flow and
broad upper troughing over the pac nw. This will favor near or
slightly below normal temperatures along with a few light showers,|
mainly on windward mountain slopes and in a puget sound
convergence zone. The ECMWF basically maintains this pattern
Saturday and possibly into next Sunday, while the GFS becomes a
bit more zonal with 500 mb heights rising above 570 decameters.
This will mainly affect the inland extent of marine clouds and
would make a few degrees difference in high temperatures, but
nothing more impactful than that. Haner
Aviation Wrn wa will remain btwn an upper level trof offshore and
a ridge of high pres over the interior w. SW flow aloft will become
more sly with time.
Meanwhile, expect wdsprd ifr CIGS over the coast, puget sound region
swd, and areas adjacent to the strait of juan de fuca this morning,
with areas of ifr CIGS from whidbey island nwd. There will be areas
of lifr CIGS vsbys over the interior lowlands. CIGS will lift into
the MVFR category range and the fog will dissipate by 1900 utc.
Expect the clouds to scatter out over the interior btwn 1800 and
2000 utc; however, stratus will linger over the coast all day.
Ksea... The stratus was moving in from the south at this time. Expect
ifr CIGS to lift into the MVFR category range (1-2k ft) by late this
morning. There will likely be fog reducing the surface visibility to
5 sm, possibly as low as 2sm, this morning. Expect the clouds to
scatter out between 11 am and noon. Winds will be southerly 5-10
knots, becoming westerly this afternoon.
High pressure offshore coupled with lowering pressure east of the
cascades will result in strengthening onshore flow through tonight.
The flow will weaken Tuesday as the offshore high shifts east,
eventually reaching the wa coast Tue evening. A 1014 mb high on the
wa coast with lower pressure east of the cascades will result in
light onshore flow on Wednesday.
Sew watches warnings advisories
Pz... Gale warning until 5 am pdt Tuesday for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.
Small craft advisory until 5 am pdt Tuesday for northern inland
waters including the san juan islands-west entrance u.S.
Waters strait of juan de fuca.
Small craft advisory until 3 am pdt Tuesday for admiralty inlet.
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||11 mi||50 min||W 2.9 G 5.1|
|TCNW1 - 9446484 - Tacoma, WA||12 mi||56 min||54°F||51°F||1019 hPa|
|EBSW1 - 9447130 - Seattle, WA||15 mi||50 min||SSW 2.9 G 4.1||53°F||51°F||1018.9 hPa|
|WPOW1 - West Point, WA||21 mi||68 min||SSW 6 G 8||52°F||1018.9 hPa (+0.0)||51°F|
|46121||26 mi||1431 min||5.8||52°F||1018.3 hPa||49°F|
|46120||27 mi||51 min||WNW 5.8||52°F||1018 hPa||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||4 mi||75 min||SSW 4||1.00 mi||Fog/Mist||52°F||51°F||97%||1019.4 hPa|
|Renton, Renton Municipal Airport, WA||8 mi||75 min||SSW 3||7.00 mi||Overcast||54°F||52°F||93%||1019.4 hPa|
|Seattle, Seattle Boeing Field, WA||10 mi||75 min||N 0||10.00 mi||Overcast||53°F||52°F||96%||1019 hPa|
|Tacoma, Tacoma Narrows Airport, WA||19 mi||75 min||N 0||10.00 mi||Overcast||51°F||50°F||96%||1019 hPa|
|Pierce County-Thun Field, WA||20 mi||73 min||N 0||10.00 mi||54°F||53°F||100%||1019 hPa|
|Tacoma / McChord Air Force Base, WA||20 mi||70 min||N 0||10.00 mi||Overcast||52°F||52°F||99%||1019.2 hPa|
Wind History from SEA (wind in knots)
|1 day ago||W||W||W||NW||W||NW||N||N||N||N||N||N||N||NW||N||Calm||N||N||NW||Calm||Calm||Calm||SW||SW|
|2 days ago||W||Calm||W||W||N||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Des Moines |
Click for Map
Mon -- 02:32 AM PDT 6.24 feet Low Tide
Mon -- 05:18 AM PDT Sunrise
Mon -- 07:23 AM PDT 10.63 feet High Tide
Mon -- 09:38 AM PDT Moonrise
Mon -- 02:30 PM PDT -2.26 feet Low Tide
Mon -- 08:55 PM PDT Sunset
Mon -- 09:55 PM PDT 12.84 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
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|Skagit Bay |
Click for Map
Mon -- 02:10 AM PDT 1.51 knots Max Flood
Mon -- 05:13 AM PDT -0.04 knots Slack
Mon -- 05:19 AM PDT Sunrise
Mon -- 08:39 AM PDT -1.52 knots Max Ebb
Mon -- 09:39 AM PDT Moonrise
Mon -- 11:27 AM PDT 0.05 knots Slack
Mon -- 02:40 PM PDT 2.09 knots Max Flood
Mon -- 06:48 PM PDT -0.00 knots Slack
Mon -- 08:56 PM PDT Sunset
Mon -- 09:34 PM PDT -1.43 knots Max Ebb
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 (11,2,3,4)(on/off)  Help
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