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 5:10AM||Sunset 9:13PM||Tuesday June 19, 2018 8:47 PM PDT (03:47 UTC)||Moonrise 11:17AM||Moonset 12:06AM||Illumination 42%|
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|PZZ135 Puget Sound And Hood Canal- 824 Pm Pdt Tue Jun 19 2018 |
Tonight..N wind to 10 kt becoming nw after midnight. Wind waves 1 ft or less.
Wed..Variable wind to 10 kt becoming nw in the afternoon. Wind waves 1 ft or less.
Wed night..NW wind 5 to 15 kt becoming S during the evening. Wind waves 2 ft or less.
Thu..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..S wind to 10 kt becoming variable in the afternoon. Wind waves 1 ft or less.
Fri night..NW wind 5 to 15 kt in the evening becoming light. Wind waves 2 ft or less.
Sat..Variable wind to 10 kt becoming n. Wind waves 1 ft or less.
Sun..N wind 5 to 15 kt. Wind waves 2 ft or less.
|PZZ100 824 Pm Pdt Tue Jun 19 2018 |
Synopsis for the northern and central washington coastal and inland waters..Weak onshore flow tonight will increase and become moderate to strong late Wednesday afternoon through Wednesday night. There is a threat of gale force winds over the eastern two thirds of the strait of juan de fuca late Wednesday afternoon and Wednesday night. Onshore flow will remain strong Thursday then slowly relax on Friday. Light onshore flow is expected next weekend.
7 Day Forecast for Marine Location Near Bainbridge Island city, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 200311|
area forecast discussion
national weather service seattle wa
811 pm pdt Tue jun 19 2018
Synopsis A weak upper ridge over the cascades will push
eastward tonight and Wednesday as a weak trough over the offshore
waters shifts eastward. One more very warm day is expected in the
western washington interior on Wednesday. The upper trough will
move eastward across the area late Wednesday afternoon and
Wednesday night giving an increase in afternoon and evening
showers or thunderstorms over the mountains. Onshore flow will
bring cooler marine air inland Thursday and Friday. High pressure
aloft will cross the region Saturday, followed by an upper trough
early next week.
Short term A weak upper level ridge is sitting over the
cascades this evening while weak upper level troughs or lows sit
over montana and the offshore waters along 135w. The amplified
upper level pattern will flatten out starting later Wednesday as
the upper trough offshore moves eastward into western washington.
At the surface, light onshore flow tonight and early Wednesday
will increase Wednesday afternoon.
Scattered showers and isolated thunderstorms have fired up over
the cascades in response to daytime heating. Convection will
rapidly diminish after sunset. Showers are not seen over the
olympics, and satellite imagery shows some low stratus sneaking
into the strait of juan de fuca and increasing over the coastal
waters. Will update sky, weather and pop forecasts for tonight
through Wednesday morning to account for the short-term changes
seen on satellite imagery.
After early morning clouds burn back toward the coastline, Wednesday
promises to give one more very warm day to the interior of
western washington, particularly east of i-5. Then onshore flow
will increase late Wednesday afternoon in response to the
combination of differential heating between land and sea and the
eastward progression of upper level features. In the transition to
lower heights aloft and stronger onshore flow, models
significantly increase instability Wednesday afternoon in the
cascades. The 18z GFS brings -4 lis to the cascades with cape
values on the order of 3000 j kg. As a result, the threat of
thunderstorms Wed afternoon and evening will be quite a bit higher
than this afternoon, and some of the thunderstorms could be
rather potent. The 00z nam12 shows the low lis and high cape
values extending westward to the olympics and higher terrain near
the coast into the interior lowlands. Will assess the need to
extend pops and the TSTM threat westward through the interior
after taking a complete look at the incoming 00z guidance.
A cool marine layer will spread inland Wed night into Thu morning
resulting in cooling of 10 to 15 degrees in the interior. Another
degree or two of cooling is likely on Fri as the main upper trough
offshore swings eastward through the area. Will there be a shower
threat Friday into Friday evening, especially in the convergence
zone area of the central puget sound area and in the cascades? The
nam says yes, the GFS says only maybe, and the ECMWF is dry.
Again, will inspect the full suite of incoming 00z model solutions
before making changes. Albrecht
Long term From the previous long term discussion: as the
trough exits... Upper level ridging will build in once|
more... Moving inland Saturday and east of the cascades Sunday, for
more sunshine and somewhat warmer weather. Models coming into
better alignment with regards to follow-up trough for Monday... But
pop signatures on either model not terribly impressive... As one
would expect for summer. Like the trough discussed in the short
term forecast above though... Its main impact will be bringing
temps over the area down back into the mid 60s to around 70. Smr
Aviation A weak upper ridge centered over the cascades will
move east while a weak trough over the offshore waters will move
eastward into western washington late Wednesday afternoon and
Wednesday night. At the surface, light onshore flow will increase
Wednesday afternoon and Wednesday night. Light flow aloft will
become light south to southwest. The air mass will stabilize
overnight, then become increasingly unstable, especially over the
cascades, Wednesday afternoon and evening.
Convection that fired up over the cascades this afternoon will
rapidly dissipate after sunset. In the meantime, marine stratus is
increasing over the coastal waters, and a ribbon of stratus is
moving eastward through the strait of juan de fuca. Expect low
stratus with bases 500-1000 feet to spread inland through the
strait to around whidbey island and near kpae early Wednesday
morning and to spread eastward through the chehalis gap to around
kpwt-kshn-kolm during the morning hours. Expect the greater
seattle area and areas east of i-5 to escape the stratus
and remainVFR Wednesday morning. Stratus will burn back toward
the washington coast by midday Wednesday.
Expect more convection on Wednesday afternoon as the air mass
destabilizes. At this time the convective threat appears to be
highest over the cascades. Some models show instability extending
further westward to the olympic peninsula, and the forecast may
need to be adjusted after looking at later guidance. Albrecht
ksea...VFR conditions are likely to prevail through Wednesday
afternoon. At this time it appears that low stratus will remain
west of the terminal Wednesday morning and convection Wednesday
afternoon and evening will remain over the cascades. Light and
variable winds tonight and early Wednesday will become west to
northwest 4-8 kt Wednesday afternoon. Albrecht
Marine Weak onshore flow will become moderate to strong late
Wednesday afternoon and Wednesday night. Small craft advisories
continue until 1 am late tonight for the eastern two thirds of the
strait of juan de fuca, while a gale watch is in effect for late
Wednesday afternoon through Wednesday night.
Strong onshore pressure gradients will continue Thursday into
Thursday night, then will slowly relax on Friday. Light onshore
flow is expected next weekend. Albrecht
Sew watches warnings advisories
Pz... Gale watch from Wednesday afternoon through late Wednesday night
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.
Small craft advisory until 1 am pdt Wednesday for central u.S.
Waters strait of juan de fuca-east entrance u.S. Waters
strait of juan de fuca.
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|
|WPOW1 - West Point, WA||5 mi||48 min||NE 8 G 8.9||66°F||1015.5 hPa (-0.4)||54°F|
|EBSW1 - 9447130 - Seattle, WA||10 mi||48 min||W 1.9 G 4.1||66°F||53°F||1015.5 hPa (-0.3)|
|46125||21 mi||39 min||9.7||56°F||1015.2 hPa||54°F|
|TCMW1 - 9446482 - Tacoma Met, WA||24 mi||48 min||W 8.9 G 8.9|
|TCNW1 - 9446484 - Tacoma, WA||25 mi||48 min||75°F||53°F||1015.3 hPa (-0.5)|
|46121||26 mi||38 min||71°F||1015.1 hPa||62°F|
|PTWW1 - 9444900 - Port Townsend, WA||36 mi||48 min||WSW 6 G 8||63°F||52°F||1016.3 hPa (-0.4)|
Wind History for Seattle, Puget Sound, WA, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Boeing Field - King County International Airport, WA||13 mi||55 min||NNW 3||10.00 mi||Partly Cloudy||81°F||54°F||39%||1014.8 hPa|
|Bremerton, Bremerton National Airport, WA||16 mi||52 min||NE 7||10.00 mi||Fair||78°F||57°F||50%||1017 hPa|
|Seattle, Seattle-Tacoma International Airport, WA||17 mi||55 min||W 3||10.00 mi||Partly Cloudy||80°F||55°F||42%||1016 hPa|
|Renton Municipal Airport, WA||18 mi||55 min||NNW 4||10.00 mi||Fair||80°F||55°F||44%||1015.2 hPa|
|Everett Snohomish County, WA||24 mi||55 min||N 4||10.00 mi||Fair||76°F||48°F||39%||1016 hPa|
|Tacoma, Tacoma Narrows Airport, WA||24 mi||55 min||W 3||10.00 mi||Partly Cloudy||81°F||57°F||44%||1015.1 hPa|
Wind History from BFI (wind in knots)
|1 day ago||NW||Calm||SE||Calm||Calm||SE||Calm||SE||Calm||S||SE||SE||Calm||S||Calm||W||Calm||S||SW||S||S||SW|
|2 days ago||Calm||Calm||Calm||S||SE||Calm||NW||Calm||Calm||Calm||NE||NW||N||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Eagle Harbor |
Click for Map
Tue -- 01:05 AM PDT Moonset
Tue -- 04:47 AM PDT 5.18 feet Low Tide
Tue -- 05:11 AM PDT Sunrise
Tue -- 09:41 AM PDT 8.47 feet High Tide
Tue -- 12:16 PM PDT Moonrise
Tue -- 04:12 PM PDT 0.37 feet Low Tide
Tue -- 09:11 PM PDT Sunset
Tue -- 11:28 PM PDT 12.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Rich Passage |
Click for Map
Tue -- 01:05 AM PDT Moonset
Tue -- 02:50 AM PDT -3.01 knots Max Ebb
Tue -- 05:12 AM PDT Sunrise
Tue -- 05:54 AM PDT 0.00 knots Slack
Tue -- 07:40 AM PDT 0.58 knots Max Flood
Tue -- 10:19 AM PDT -0.00 knots Slack
Tue -- 12:17 PM PDT Moonrise
Tue -- 02:25 PM PDT -2.88 knots Max Ebb
Tue -- 04:53 PM PDT 0.00 knots Slack
Tue -- 08:05 PM PDT 1.98 knots Max Flood
Tue -- 09:11 PM PDT Sunset
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.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Seattle, WA (23,6,7,8)(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.