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Marine Weather and Tides
Version 3.4 |
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. 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. |
| Sunrise 6:00AM | Sunset 8:11PM | Monday April 23, 2018 7:53 PM PDT (02:53 UTC) | Moonrise 11:59AM | Moonset 2:12AM | Illumination 63% |  |
Marine Forecasts
EDIT (on/off) Help| PZZ135 Puget Sound And Hood Canal- 323 Pm Pdt Mon Apr 23 2018...updated .small craft advisory in effect til 9 pm this evening... Tonight..N wind 15 to 25 kt easing to 5 to 15 late this evening. Wind waves 2 to 4 ft subsiding to 1 or 2 ft. Tue..N wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less. Tue night..N wind 10 to 20 kt easing to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less after midnight. Wed..N wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less. Wed night..N wind 5 to 15 kt in the evening becoming light. Wind waves 2 ft or less. Thu..Light wind. Wind waves less than 1 ft. Thu night..NW wind to 10 kt becoming S after midnight. Wind waves 1 ft or less. Fri..SW wind to 10 kt. Wind waves 1 ft or less. Sat..S wind to 10 kt becoming sw 5 to 15 kt. Wind waves 2 ft or less. | PZZ100 224 Pm Pdt Mon Apr 23 2018 Synopsis for the northern and central washington coastal and inland waters..High pressure inland with thermally induced low pressure along the oregon and washington coasts will persist until about Thursday morning. The thermal low pressure will move inland on Thursday with onshore flow developing Thursday night and Friday. |
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 232247 aaa afdsew area forecast discussion national weather service seattle wa 345 pm pdt Mon apr 23 2018... Updated updated marine headlines. Synopsis A ridge aloft will move into eastern washington tonight and persist into Thursday. Surface high pressure over southeastern british columbia combined with a developing thermal trough of low pressure along the coast will give low-level offshore flow. The ridge aloft and offshore flow at lower levels will give highs into the 70s across much of the area Tuesday and Wednesday, and highs will reach into the lower 80s in some locations on Thursday. An upper level low will approach from the southwest late in the week bringing a return to seasonably cool temperatures and a chance of showers Friday through next weekend. Short term Other than a few cirrus, conditions are clear across the region and temperatures are warming rapidly as offshore flow develops. To varying degrees, high pressure aloft and low level offshore flow will give very nice weather to the area through Thursday! after highs near 70 today, we will see highs into the 70s on Tuesday (about 5 degrees higher than today) with a possible lower 80 in the far south interior. Low temperatures tonight will fall into the 30s in the typically coldest locations (like arlington and olympia airport), but will generally be about 5 degrees warmer than this morning. Low temperatures will warm further on Tuesday night as the air mass continues to warm. The high temperature forecast for Wednesday is a bit trickier than the one for Tuesday. A weak shortwave trough will be moving over the top of the west coast ridge Tuesday night allowing heights to fall a bit and offshore flow to relax somewhat. Low level thickness forecasts from all of the models, however, show a slight increase by Wednesday afternoon as ridging and offshore flow strengthens. So, temperatures on Wednesday are likely to be the same or a degree or two higher than on Tuesday. High temperatures Tuesday and Wednesday will threaten the record daily maxima at many locations, but will likely fall just short. Thursday will be the warmest day of this upcoming warm spell and will be the warmest of the year so far. Current thinking is for in the mid 70s to lower 80s across the interior and potentially on the coast as the upper level ridge rebounds over the area and offshore flow peaks. Daily record highs are a bit warmer on Thursday, so again records will be threatened - but temperatures will likely fall just short. Forecast temperatures are a blend of the previous forecast and a mean of the various short-term models. Albrecht Long term There continues to be rather large differences between the GFS solution and the ECMWF canadian solutions today. |
All models agree that a marine push will begin Thursday evening, but the ECMWF canadian solutions hold most of the precipitation just to the south of the forecast area as a weaker shortwave trough rotates around a low that will move inland over the southern half of oregon. The GFS is much more robust with the strength of the shortwave trough and is farther north with its track. The GFS develops a rather heavy rain band with a deformation zone over western washington Friday through Saturday night. The GFS total precipitation amounts are well over an inch at seatac and some solutions are wetter still. The ECMWF is much, much more tame. At this time, a model blend was used to populate the forecasts and were weighted more heavily toward the ecmwf. The models are all showing good continuity with their previous solutions; maybe one of them will 'give in' on the next couple of forecast cycles. One sure bet for the upcoming weekend will be much cooler temperatures. Temperatures will fall significantly on Friday. A model blend would suggest upper 50s for highs on Friday while the ECMWF would suggest highs more into the mid 60s. A weighted blend toward the ECMWF was used today. After Friday, temperatures fall to a few degrees below for the weekend as deeper cloud cover and precipitation chances increase and the air mass aloft continues to cool. Albrecht Aviation An upper level ridge is over the region with dry stable air. At the surface there is high pressure centered over southeast british columbia and thermally induced low pressure extending north along the oregon coast. Ksea... Clear skies and a northerly breeze. Marine High pressure inland and thermally induced low pressure along the oregon and washington coast will persist until about Thursday morning. Northerly flow down puget sound should peak around 20kt this afternoon and evening but overall the flow should become become more easterly for some areas. Small craft advisory strength easterlies are forecast at the west entrance of the strait of juan de fuca around CAPE flattery. The thermally induced low pressure will move inland on Thursday with onshore flow developing Thursday night and Friday. Sew watches warnings advisories Wa... None. Pz... Small craft advisory in effect til noon pdt Tuesday for the coastal waters from CAPE flattery to james island out 10 nm and the west entrance u.S. Waters strait of juan de fuca. Small craft advisory in effect until 900 pm pdt this evening for puget sound and hood canal. |
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 | 53 min | WNW 7 G 8.9 | 63°F | 49°F | 1023.2 hPa (-1.2) | ||
| WPOW1 - West Point, WA | 24 mi | 53 min | NNE 12 G 12 | 55°F | 1023.3 hPa (-1.5) | 42°F | ||
| 46120 | 25 mi | 52 min | N 12 | 57°F | 1023 hPa | 43°F | ||
| TCNW1 - 9446484 - Tacoma, WA | 28 mi | 53 min | 63°F | 50°F | 1022.3 hPa (-1.8) | |||
| TCMW1 - 9446482 - Tacoma Met, WA | 28 mi | 53 min | N 22 G 27 | |||||
| 46121 | 42 mi | 49 min | 60°F | 1022.3 hPa | 39°F |
Wind History for Seattle, Puget Sound, WA, WA
(wind in knots) EDIT (on/off) Help| 7 PM | 8 PM | 9 PM | 10 PM | 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 | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | NW G10 | NW | NW G8 | NW | N | SW G4 | W | -- | NW | -- | N | SE | S | NE G5 | NW | NW | NW G9 | NW | N G9 | NW G12 | N G15 | NW G17 | NW G14 | NW G13 |
| 1 day ago | E G8 | -- | S | S | SW | SW | S | S | SE | SW | SW | SE | N | NW | NW | NW G7 | NW G9 | NW G12 | NW G13 | NW G13 | NW G10 | NW G13 | NW G16 | N G13 |
| 2 days ago | SW | SW | SW G11 | S G9 | SW G12 | S G11 | SW G13 | S G12 | S G17 | S G16 | SW G11 | SW G15 | SW G10 | S G8 | SW G13 | SW | SW | SW | NW | SW G11 | NE | E G8 | NW | SE |
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 | 60 min | NW 12 | 10.00 mi | Fair | 65°F | 39°F | 39% | 1023.1 hPa |
| Boeing Field - King County International Airport, WA | 15 mi | 60 min | NNW 6 | 10.00 mi | Fair | 65°F | 35°F | 33% | 1022.9 hPa |
| Seattle, Seattle-Tacoma International Airport, WA | 17 mi | 60 min | N 13 | 10.00 mi | A Few Clouds | 65°F | 37°F | 36% | 1023.6 hPa |
Wind History from RNT (wind in knots)
| 8 PM | 9 PM | 10 PM | 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 | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | |
| Last 24hr | NW | W | NW | Calm | Calm | Calm | N | Calm | Calm | Calm | Calm | Calm | NW | N | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW |
| 1 day ago | N | N | N | NW | NW | Calm | Calm | N | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | ||||||
| 2 days ago | SE | S | S | S | SE | S G17 | SE | SE | SE | S | SE | S | S | S | SW G17 | S | SE | S | NW | N | NW | NW | 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 Mon -- 12:34 AM PDT 11.00 feet High Tide Mon -- 03:13 AM PDT Moonset Mon -- 06:05 AM PDT Sunrise Mon -- 06:32 AM PDT 6.04 feet Low Tide Mon -- 11:03 AM PDT 8.49 feet High Tide Mon -- 01:00 PM PDT Moonrise Mon -- 06:15 PM PDT 0.27 feet Low Tide Mon -- 08:10 PM PDT Sunset 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 |
| 10.9 | 10.9 | 10.3 | 9.2 | 7.9 | 6.7 | 6.1 | 6.1 | 6.6 | 7.4 | 8.1 | 8.5 | 8.2 | 7.3 | 5.9 | 4.2 | 2.5 | 1 | 0.3 | 0.6 | 1.8 | 3.7 | 6 | 8.3 |
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 Mon -- 12:34 AM PDT -0.00 knots Slack Mon -- 03:14 AM PDT Moonset Mon -- 03:46 AM PDT -0.62 knots Max Ebb Mon -- 06:06 AM PDT Sunrise Mon -- 07:58 AM PDT 0.00 knots Slack Mon -- 08:50 AM PDT 0.12 knots Max Flood Mon -- 10:55 AM PDT -0.00 knots Slack Mon -- 01:00 PM PDT Moonrise Mon -- 03:20 PM PDT -0.78 knots Max Ebb Mon -- 07:05 PM PDT 0.00 knots Slack Mon -- 08:10 PM PDT Sunset Mon -- 09:40 PM PDT 0.66 knots Max Flood 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 |
| 0.1 | -0.1 | -0.4 | -0.6 | -0.6 | -0.5 | -0.4 | -0.2 | 0 | 0.1 | 0.1 | -0 | -0.2 | -0.5 | -0.7 | -0.8 | -0.7 | -0.6 | -0.3 | -0 | 0.3 | 0.6 | 0.7 | 0.6 |
Weather Map and Satellite Images
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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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Seattle, WA (22,6,7,8)
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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. |