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Marine Weather and Tides
Version 3.4 |
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported. 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 6:08AM | Sunset 8:14PM | Friday August 18, 2017 10:33 PM PDT (05:33 UTC) | Moonrise 1:35AM | Moonset 5:10PM | Illumination 10% |  |
Marine Forecasts
EDIT (on/off) Help| PZZ135 Puget Sound And Hood Canal- 900 Pm Pdt Fri Aug 18 2017 Tonight..NW wind 5 to 15 kt becoming ne after midnight. Wind waves 2 ft or less. Sat..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less. Sat night..N wind to 10 kt becoming ne after midnight. Wind waves 1 ft or less. Sun..N wind to 10 kt. Wind waves 1 ft or less. Sun night..NE wind to 10 kt. Wind waves 1 ft or less. Mon..N wind to 10 kt. Wind waves 1 ft or less. Mon night..N wind to 10 kt. Wind waves 1 ft or less. Tue..NW wind to 10 kt becoming variable. Wind waves 1 ft or less. Wed..Light wind becoming N to 10 kt. Wind waves 1 ft or less. | PZZ100 900 Pm Pdt Fri Aug 18 2017 Synopsis for the northern and central washington coastal and inland waters..A typical august pattern will prevail through the middle of next week. Expect onshore flow of varying strength to persist due to high pres offshore and lower pres east of the cascades. |
7 Day Forecast for Marine Location Near Issaquah, WA
Hourly EDIT Helplocation: 47.54, -122.02 debug
Area Discussion for - Seattle, WA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 ksew 190416 afdsew area forecast discussion national weather service seattle wa 915 pm pdt Fri aug 18 2017 Synopsis A few light showers were falling around western washington this evening. Clouds will decrease on Saturday. Another weak system will move by to the north of the area on Sunday. High pressure at the surface and aloft will give dry and warmer weather to the area Monday and Tuesday. Another weak system will move across mainly the northern portions of the area later Wednesday through Thursday night. Short term Onshore flow will continue as a weak system moves by to the north of the area and higher pressure builds in from the west. A few light showers were falling here and there around the puget sound area. Ridging offshore will deflect another weakening frontal system to the north of the area Sunday. Some light showers could fall on the northwestern olympic peninsula but mainly there will be more clouds in the north and on the coast. Sunday high temperatures will likely be near or slightly higher than Saturday. Ridging aloft will build offshore Sunday night and will move east across the area later Monday and Monday night. The ridging will result in clearing late Sunday night into Monday morning and a warming trend. With the ridging and warming aloft, highs on Monday may reach 80 in the interior from seattle southward. On Tuesday, we will see the offshore ridge shift eastward into western montana by late in the afternoon. The eastward movement of the upper ridge will induce an increase in onshore flow, so it will be cooler on the coast. Long term The ECMWF is showing better run to run consistency than the gfs, and the latest GFS solutions are trending toward the ecmwf. The extended period will feature the transit of an upper level low or trough to the north of the area during the latter half of next week. This will result in an increase in onshore flow and clouds and will give cooler daytime high temperatures. Even the weaker ECMWF shows a possibility of showers across the area later Wednesday through Thursday night, so they were included in today's extended forecast. The GFS appears to be backing away from its solution of a deep upper low moving across the region mid to late week. Some ridging is possible beginning next Friday or Saturday, for dry and warmer weather. The GFS is more extreme with the ridging; a model blend about 2 3 toward the ECMWF was used for the forecast fields for next Friday and beyond. Albrecht Aviation West to northwest flow aloft over western washington will continue tonight and Saturday, as the upper trough over |
british columbia moves east and an upper ridge builds offshore. Surface high pressure remains offshore with lower pressure east of the cascades, and moderately strong onshore flow will prevail. Ceilings below 1000 feet this evening along the coast. Over the interior scattered to broken layer near 3500 feet with a broken cloud layer near 6000 feet. Little change for the next few hours. Low level onshore flow combined with some convergence will lower ceilings in the central puget sound area down to 1000-2000 feet after 11z Saturday morning. Ceilings will improve all areas Saturday afternoon. Ksea... Ceilings near 6000 feet with scattered layer near 4000 feet going broken at times through early Saturday morning. Lower stratus moving into the terminal around 11z with ceilings lowering down to near 1000 feet. Ceilings improving late morning with clouds scattering out by noon. Northerly wind 6 to 10 knots. Felton Marine Kuil-kbli gradient near plus 3 mb this evening. Winds have not hit gale yet in the central and eastern strait of juan de fuca but with the gradient this high will keep the gales going into the early morning hours. Small craft advisories for admiralty inlet and the northern inland waters will also remain in effect. After tonight, a typical august pattern will prevail through the middle of next week; onshore flow of varying strength will persist due to high pressure offshore and lower pressure east of the cascades. Small craft advisory westerlies are possible in the central and eastern strait of juan de fuca in the evening and early morning hours beginning Saturday evening and continuing into the middle of next week. Felton Sew watches warnings advisories Wa... None. Pz... Small craft advisory until noon pdt Saturday for coastal waters from CAPE flattery to james island 10 to 60 nm-coastal waters from james island to point grenville 10 to 60 nm- coastal waters from point grenville to CAPE shoalwater 10 to 60 nm. Gale warning until 3 am pdt Saturday for central u.S. Waters strait of juan de fuca-east entrance u.S. Waters strait of juan de fuca. Small craft advisory until 3 am pdt Saturday for admiralty inlet- northern inland waters including the san juan islands. |
Weather Reporting Stations
EDIT (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 |
| EBSW1 - 9447130 - Seattle, WA | 17 mi | 46 min | S 1.9 G 4.1 | 68°F | 57°F | 1020.4 hPa | ||
| WPOW1 - West Point, WA | 24 mi | 34 min | N 12 G 13 | 62°F | 1020.7 hPa (+0.4) | 57°F | ||
| 46120 | 25 mi | 40 min | SW 7.8 | 63°F | 1019.8 hPa | 56°F | ||
| TCNW1 - 9446484 - Tacoma, WA | 28 mi | 52 min | 67°F | 56°F | 1020.6 hPa | |||
| TCMW1 - 9446482 - Tacoma Met, WA | 28 mi | 46 min | NW 4.1 G 5.1 | |||||
| 46121 | 42 mi | 36 min | 3.9 | 66°F | 1019.6 hPa | 58°F |
Wind History for Seattle, Puget Sound, WA, WA
(wind in knots) EDIT (on/off) Help| 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | -12 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | |
| Last 24hr | N G9 | W | SW | -- | -- | -- | NW | NE | SW | W | NW | NW | -- | NW | W | NW | NW G7 | NW | NW | N G7 | NW | N | E G5 | |
| 1 day ago | SW | SW | NW | NW | E | -- | E G7 | SE | SE | NW | NW | NW | NW | NW | -- | NW | NW | NW | NW | NW | NW | W | NE | |
| 2 days ago | NW | S | SE | W | NW | NW | N G5 | NW | NW G4 | NW | NW G7 | NW | W | NW | N G4 | SE | W G9 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Renton Municipal Airport, WA | 11 mi | 41 min | N 0 | 10.00 mi | Overcast | 69°F | 57°F | 68% | 1020.7 hPa |
| Boeing Field - King County International Airport, WA | 15 mi | 41 min | N 4 | 10.00 mi | Overcast | 69°F | 60°F | 73% | 1020.2 hPa |
| Seattle, Seattle-Tacoma International Airport, WA | 17 mi | 41 min | NNE 9 | 10.00 mi | Mostly Cloudy | 69°F | 55°F | 63% | 1021.1 hPa |
Wind History from RNT (wind in knots)
| 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | |
| Last 24hr | NW | NW | NW | NW | Calm | Calm | Calm | Calm | SE | S | SE | SE | Calm | S | S G15 | S G18 | SW | SW | N | Calm | N | Calm | ||
| 1 day ago | Calm | SE | S | Calm | SE | S | S | S | S | S | Calm | E | NW | NW | N | NW | NW | NW | NW | NW | W | NW | NW | |
| 2 days ago | N | NW | NW | NW | Calm | Calm | Calm | SE | Calm | SE | S | SE | SE | N | N | NW | NW | SW | NW |
Tide / Current Tables for Duwamish Waterway, Washington
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Duwamish Waterway Click for Map Sat -- 02:22 AM PDT 10.38 feet High Tide Sat -- 03:41 AM PDT Moonrise Sat -- 06:11 AM PDT Sunrise Sat -- 09:47 AM PDT -1.54 feet Low Tide Sat -- 04:57 PM PDT 11.06 feet High Tide Sat -- 07:00 PM PDT Moonset Sat -- 08:13 PM PDT Sunset Sat -- 10:25 PM PDT 5.61 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 8.2 | 9.5 | 10.3 | 10.2 | 9.2 | 7.5 | 5.3 | 2.7 | 0.4 | -1.1 | -1.5 | -0.6 | 1.4 | 4.1 | 6.9 | 9.2 | 10.6 | 11.1 | 10.6 | 9.4 | 7.8 | 6.4 | 5.7 | 5.8 |
Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
EDIT (on/off) Help One Week of Data| Restoration Point Click for Map Sat -- 02:28 AM PDT -0.00 knots Slack Sat -- 03:41 AM PDT Moonrise Sat -- 06:11 AM PDT Sunrise Sat -- 06:42 AM PDT -1.09 knots Max Ebb Sat -- 10:32 AM PDT 0.01 knots Slack Sat -- 01:02 PM PDT 0.85 knots Max Flood Sat -- 05:00 PM PDT -0.00 knots Slack Sat -- 07:01 PM PDT Moonset Sat -- 07:55 PM PDT -0.69 knots Max Ebb Sat -- 08:14 PM PDT Sunset Sat -- 11:24 PM PDT 0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.3 | 0.2 | 0.1 | -0.2 | -0.5 | -0.8 | -1 | -1.1 | -0.9 | -0.6 | -0.2 | 0.3 | 0.7 | 0.8 | 0.8 | 0.6 | 0.3 | 0 | -0.4 | -0.6 | -0.7 | -0.6 | -0.4 | -0.1 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of PacificNorthwest EDIT  |
Wind Forecast for Seattle, WA (1,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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Disclaimer: 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. |