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 5:11AM||Sunset 9:05PM||Tuesday May 30, 2017 2:17 AM PDT (09:17 UTC)||Moonrise 9:46AM||Moonset 12:00AM||Illumination 23%|
EDIT (on/off)  Help
|PZZ133 Northern Inland Waters Including The San Juan Islands- 900 Pm Pdt Mon May 29 2017 |
.small craft advisory in effect until 2 am pdt Tuesday...
Tonight..S wind 15 to 25 kt easing to 10 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 1 or 2 ft. A chance of showers after midnight.
Tue..S wind 10 to 20 kt. Wind waves 1 to 3 ft. A chance of showers in the morning then a chance of tstms in the afternoon.
Tue night..SW 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. A chance of tstms in the evening then a chance of showers after midnight.
Wed..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Wed night..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Thu..S wind to 10 kt becoming sw 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Thu night..W wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..SE wind to 10 kt becoming w. Wind waves 1 ft or less.
Sat..NW wind to 10 kt becoming sw 20 to 30 kt. Wind waves 1 ft or less building to 3 to 5 ft.
|PZZ100 900 Pm Pdt Mon May 29 2017 |
Synopsis for the northern and central washington coastal and inland waters..Onshore flow will increase each afternoon and evening this week. At times gale or near gale force west winds are possible in the strait. Small craft advisory winds are likely over waters adjacent to the strait.
7 Day Forecast for Marine Location Near Bay View, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 300358|
area forecast discussion
national weather service seattle wa
858 pm pdt Mon may 29 2017
Synopsis A weak upper trough will bring a chance of showers
and possibly some thunderstorms to western washington on Tuesday.
Onshore flow will peak on Tuesday then gradually ease the rest of
the week. Weak weather disturbances will keep clouds and a chance of
some showers in the forecast through the end of the week. Dry and
somewhat warmer weather may arrive by the weekend.
Short term Thunderstorms popped up over the oregon cascades
this afternoon with one cell drifting over the dalles. This cell
should weaken and remain S SE of the cwa. Otherwise, skies are
clear except for stratus clouds along the coast. An onshore push
will bring stratus clouds farther inland overnight and cover most
of the interior by morning.
The upper level ridge that brought warm, dry and stable weather
to the region will push east on Tuesday. Tuesday will be cooler
with the increase in low level stratus clouds - highs mainly in
the 60s. An upper level short wave trough will swing N NE through
w wa in the afternoon which may trigger a few thunderstorms.
These storms will be high based and most likely affect the
cascades where instability is the greatest. T-storm activity
should diminish over the late evening.
An upper level low will spin off central southern b.C. On
Wednesday then send a weak front inland on Thursday for a chance
of showers. Temperatures will remain close to normal. 33
Long term Previous discussion... The GFS brings one more
disturbance through the area around Friday. This will keep some
clouds and a few showers around and probably hold high
temperatures back from reaching the 70s.
Both the GFS and ECMWF show more ridging by the weekend. A system
will brush the area but precipitation mostly should stay north of
the area. Kept the lowlands generally dry and indicated a slight
warming trend into the low 70s. The mountain may see a few showers
as a trough just barely brushes the area but is not expected to
amount to much. Mercer
Aviation A strong upper level ridge over eastern washington will
slowly shift east tonight and Tuesday. Flow aloft will become
southerly and allow upper level moisture into the area Tuesday. An
upper level shortwave approaching from the SW will cause the air
mass to become slightly unstable 12z-23z Tuesday for isolated
thunderstorms. The convection is expected to be elevated, which
means it would be occuring above the stable surface-based marine
The air mass over the interior is dry and stable, but marine stratus
on the coast has intruded as far as kshn at 03z. Moderate to strong
onshore surface flow will bring marine stratus into the interior
tonight. Widespread MVFR ceilings below 2500 ft are likely to cover
the lowlands after 10z. Local ifr ceilings are possible. Ceilings
are expected to become MVFR lowVFR levels after 21z but most areas
will probably not clear out.
Ksea... Discussion above applies. Stratus ceilings below 2k ft are
expected after 10z. Some improvement is likely in the afternoon
withVFR ceilings and some breaks in the overcast. Surface winds
will remain southwesterly 7-10 kt. Chb
Marine Currently solid westerly gales are occurring in the
central and east strait. Outflow winds are keeping admiralty inlet
and the northern inland waters in small craft advisories. All these
winds will taper later tonight.
Onshore flow will continue through the week. Gale force winds are
possible in the strait at times, along with small craft advisory
level winds on the coast and near the strait. After tonight, the
strongest winds appear to be around Thursday. Chb
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 2 am pdt Tuesday for northern inland
waters including the san juan islands.
Small craft advisory until 11 pm pdt this evening for admiralty
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|
|PBFW1 - Padilla Bay Reserve, WA||3 mi||48 min||SSW 2.9||49°F||1015 hPa||48°F|
|46118||17 mi||93 min||SE 21||54°F||1012.6 hPa||51°F|
|SISW1 - Smith Island, WA||20 mi||78 min||WSW 21 G 24||50°F||1014.1 hPa (+0.8)|
|FRDW1 - 9449880 - Friday Harbor, WA||26 mi||48 min||SW 24 G 28||52°F||50°F||1013.6 hPa|
|PTWW1 - 9444900 - Port Townsend, WA||28 mi||48 min||WSW 5.1 G 7||51°F||50°F||1015.3 hPa|
|CHYW1 - 9449424 - Cherry Point, WA||29 mi||48 min||SE 9.9 G 17||1012.9 hPa|
|CPMW1||29 mi||48 min||SE 13 G 16||55°F|
Wind History for Friday Harbor, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Burlington/Mount Vernon, Skagit Regional Airport, WA||6 mi||43 min||SSE 4||7.00 mi||Fair||50°F||48°F||94%||1014.9 hPa|
|Whidbey Island, Naval Air Station, WA||10 mi||82 min||WSW 8||10.00 mi||Partly Cloudy||52°F||46°F||80%||1015.8 hPa|
|Bellingham, Bellingham International Airport, WA||21 mi||25 min||SSE 13 G 18||10.00 mi||Fair||55°F||51°F||87%||1014.3 hPa|
Wind History from BVS (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||S||Calm||S||S||Calm||Calm||NW||NW||NW||W||W||Calm||Calm||Calm||Calm||Calm||S||Calm|
|2 days ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NW||NW||NW||NW||NW||W||NW||W||W||Calm||Calm||Calm||Calm||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Swinomish Channel Entrance |
Click for Map
Tue -- 12:46 AM PDT Moonset
Tue -- 04:21 AM PDT 5.64 feet Low Tide
Tue -- 05:13 AM PDT Sunrise
Tue -- 08:10 AM PDT 6.95 feet High Tide
Tue -- 10:45 AM PDT Moonrise
Tue -- 03:38 PM PDT -1.22 feet Low Tide
Tue -- 09:01 PM PDT Sunset
Tue -- 11:02 PM PDT 9.21 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Guemes Channel |
Click for MapFlood direction 95° true
Ebb direction 255° true
Tue -- 12:47 AM PDT Moonset
Tue -- 12:55 AM PDT -1.73 knots Max Ebb
Tue -- 04:56 AM PDT 0.00 knots Slack
Tue -- 05:14 AM PDT Sunrise
Tue -- 06:00 AM PDT 0.39 knots Max Flood
Tue -- 06:30 AM PDT -0.00 knots Slack
Tue -- 10:46 AM PDT Moonrise
Tue -- 12:11 PM PDT -2.88 knots Max Ebb
Tue -- 04:15 PM PDT 0.00 knots Slack
Tue -- 06:53 PM PDT 1.88 knots Max Flood
Tue -- 09:02 PM PDT Sunset
Tue -- 09:55 PM PDT -0.00 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 (5,6,7,8)(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.