Friday, February21, 2020
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Marine Weather and Tides
Redmond, WA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:02AMSunset 5:41PM Friday February 21, 2020 5:03 PM PST (01:03 UTC) Moonrise 6:34AMMoonset 3:42PM Illumination 3% Phase: Waning Crescent; Moon at 28 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ135 Puget Sound And Hood Canal- 235 Pm Pst Fri Feb 21 2020
Tonight..Variable wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less. A slight chance of rain after midnight.
Sat..S wind 5 to 15 kt in the morning becoming light. Wind waves 2 ft or less. A chance of rain in the morning then a slight chance of rain in the afternoon.
Sat night..Light wind becoming S 5 to 15 kt after midnight. Wind waves 2 ft or less. A chance of rain after midnight.
Sun..S wind 15 to 25 kt becoming sw 20 to 30 kt in the afternoon. Wind waves 2 to 5 ft.
Sun night..SW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Mon..SW wind to 10 kt in the morning becoming light. Wind waves 1 ft or less.
Mon night..Light wind. Wind waves less than 1 ft.
Tue..Light wind. Wind waves less than 1 ft.
Wed..Light wind. Wind waves less than 1 ft.
PZZ100 235 Pm Pst Fri Feb 21 2020
Synopsis for the northern and central washington coastal and inland waters..A weak front will move through the area tonight and Saturday. A stronger front and vigorous low pressure system will arrive Sunday. Onshore flow will ease Monday and Tuesday. Another weak front will reach the area on Wednesday.


7 Day Forecast for Marine Location Near Redmond, WA
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location: 47.68, -122.1     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 212224 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 224 PM PST Fri Feb 21 2020

SYNOPSIS. A weak frontal system will bring increasing clouds and a chance of showers tonight and Saturday. A stronger and wetter system will bring more rain, gusty winds and mountain snow on Sunday. Rain and snow will gradually taper Monday, allowing for a generally benign week of weather next week.

SHORT TERM /TONIGHT THROUGH MONDAY/. We're seeing one last fine day across western WA with temps in the 50s and skies mostly sunny. But our dry streak will come to an end as a weak Pacific frontal system moves inland tonight and Saturday. Most of the showers will be along the coast and in the mountains as this system passes through. Rainfall amounts in the interior will be generally light (under 0.10"). Temperatures will be a few degrees cooler on Saturday with highs in the upper 40s. We'll see a brief break in the weather Saturday night as this system exits.

A stronger and wetter frontal system is slated for Sunday. This system will bring more rain, gusty winds and possibly heavy mountain snow to the area. Snow levels will remain low, around 2500 ft, with accumulating snow expected at the higher passes (like Stevens and White Pass). Snoqualmie Pass may see a rain/snow mix at times. Winds will be gusty (out of the S/SW) as the cold front moves through the interior Sunday afternoon - gusts to 30 to 40 mph expected. Showers will mostly impact the Cascades Sunday night under post-frontal onshore flow. Will likely see a convergence zone develop which may bring more heavy snow to the central Cascades (including Stevens and Snoqualmie Passes).

Showers will linger into Monday as onshore flow continues but it looks like most of the activity will remain in the Cascades. We should see drier conditions toward the afternoon and evening as a ridge moves inland. 33

LONG TERM /TUESDAY THROUGH FRIDAY/. High pressure will remain over the Pac NW on Tuesday for dry and mild weather across western WA. The ridge will weaken/flatten Tuesday night or Wednesday as a weak frontal system moves into southern B.C. and clips western WA. The ridge may rebuild over the region late in the week for another brief dry spell. 33

AVIATION. Westerly flow aloft tonight and Saturday. A weak front will move into the area tonight then break up over the area on Saturday. The air mass is stable with low clouds at the immediate coast and thin high clouds elsewhere. Ceilings will lower tonight with low clouds by Saturday morning as a weak front moves into the area.

KSEA . High clouds at times this evening. Ceilings will gradually lower tonight with low clouds developing Saturday morning as a weak front moves into the area. Southerly wind 4-8 knots. Schneider

MARINE. A weak front will reach the area late tonight then fall apart on Saturday. There could be a few hours of small craft advisory strength southerly winds Saturday morning for the northernmost inner Coastal Waters zone as well as the West Entrance Strait of Juan de Fuca, and Northern Inland Waters but it looks pretty marginal.

A stronger frontal system will cross the area Saturday night and Sunday. This system should bring gale force southerly winds to the Coastal Waters. Gales force southerly winds are also possible for the entrances to the Strait and Northern Inland Waters but this looks more marginal.

Strong onshore flow will follow the front later Sunday and Sunday night with gale force west winds for the Coastal Waters, the Strait, and Admiralty Inlet with small craft advisory strength winds all other waters. Seas over the Coastal Waters will briefly build to 20-24 feet Sunday afternoon or early Sunday evening.

Onshore flow will ease on Monday then become light southeasterly on Tuesday in advance of a weak front. The aforementioned weak front will move into the area around Tuesday night then fall apart on Wednesday as it moves inland. Schneider

HYDROLOGY. No river flooding is expected over the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory from 10 PM this evening to 9 AM PST Saturday for Northern Inland Waters Including The San Juan Islands.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 18 mi63 min S 5.1 G 6 49°F 1020.6 hPa (-1.6)38°F
TCNW1 - 9446484 - Tacoma, WA 33 mi57 min 56°F 48°F1021 hPa
TCMW1 - 9446482 - Tacoma Met, WA 33 mi45 min NNE 1 G 1.9
PTWW1 - 9444900 - Port Townsend, WA 46 mi45 min WSW 2.9 G 4.1 49°F 47°F1021.4 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA14 mi70 minS 710.00 miFair55°F30°F38%1021.1 hPa
Boeing Field - King County International Airport, WA15 mi70 minS 510.00 miPartly Cloudy55°F30°F38%1020.5 hPa
Everett Snohomish County, WA19 mi70 minSW 610.00 miFair50°F32°F50%1020.8 hPa
Seattle, Seattle-Tacoma International Airport, WA20 mi70 minSSW 710.00 miMostly Cloudy53°F32°F45%1021.3 hPa

Link to 5 minute data for KRNT

Wind History from RNT (wind in knots)
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Last 24hrCalmCalmS4N3CalmCalmS4CalmSE3CalmS3CalmS3SE5SE3S4S5S4SE3S65S4S7SW3
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SE53CalmCalmN5NW5N4NW5NW5N5NW7N7N6N6N4NW7NW6NW3
2 days agoN9N7N7N6N9NW6CalmNE3CalmCalmCalmCalmCalmCalmCalmN3NW7NW8N5N74SE6SE7SE6
G15

Tide / Current Tables for Seattle, Washington
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Seattle
Click for Map
Fri -- 04:44 AM PST     11.86 feet High Tide
Fri -- 06:34 AM PST     Moonrise
Fri -- 07:05 AM PST     Sunrise
Fri -- 10:08 AM PST     6.70 feet Low Tide
Fri -- 02:54 PM PST     9.93 feet High Tide
Fri -- 03:43 PM PST     Moonset
Fri -- 05:41 PM PST     Sunset
Fri -- 09:54 PM PST     -0.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.468.510.411.611.811.19.88.37.26.76.97.78.89.69.99.58.36.33.91.6-0-0.50.2

Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Fri -- 12:38 AM PST     0.76 knots Max Flood
Fri -- 04:31 AM PST     -0.00 knots Slack
Fri -- 06:34 AM PST     Moonrise
Fri -- 07:05 AM PST     Sunrise
Fri -- 07:08 AM PST     -0.41 knots Max Ebb
Fri -- 10:46 AM PST     0.00 knots Slack
Fri -- 12:26 PM PST     0.21 knots Max Flood
Fri -- 02:40 PM PST     -0.00 knots Slack
Fri -- 03:43 PM PST     Moonset
Fri -- 05:41 PM PST     Sunset
Fri -- 06:35 PM PST     -0.65 knots Max Ebb
Fri -- 10:18 PM PST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.80.60.40.1-0.1-0.3-0.4-0.4-0.3-0.10.10.20.20.1-0.1-0.3-0.5-0.6-0.6-0.5-0.3-0.10.3

Weather Map
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wmap_P
GEOS 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 (20,4,5,8)
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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 numerous 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.