Thursday, July16, 2020
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Marine Weather and Tides
Olympia, 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 5:31AMSunset 9:03PM Thursday July 16, 2020 10:46 AM PDT (17:46 UTC) Moonrise 1:13AMMoonset 4:38PM Illumination 14% Phase: Waning Crescent; Moon at 26 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- 852 Am Pdt Thu Jul 16 2020
Today..NW wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less. A slight chance of showers in the afternoon.
Tonight..N wind 10 to 20 kt becoming se 5 to 15 kt after midnight. Wind waves 1 to 3 ft. A chance of showers.
Fri..NE wind 5 to 15 kt. Wind waves 2 ft or less. A chance of showers in the morning then a slight chance of showers in the afternoon.
Fri night..N wind 5 to 15 kt easing to 10 kt after midnight. Wind waves 2 ft or less.
Sat..NW wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less.
Sat night..NE wind to 10 kt becoming N after midnight. Wind waves 1 ft or less.
Sun..N wind to 10 kt. Wind waves 1 ft or less.
Mon..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
PZZ100 852 Am Pdt Thu Jul 16 2020
Synopsis for the northern and central washington coastal and inland waters..Offshore high pressure through the week with low pressure to the south along the south oregon coast will maintain persistent northwesterly winds over the coastal waters. Strengthening onshore flow this afternoon and evening will result in gale conditions through the central and east strait.


7 Day Forecast for Marine Location Near Olympia, WA
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location: 47.08, -123.01     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 161613 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 913 AM PDT Thu Jul 16 2020

SYNOPSIS. Marine layer clouds will spread across the lowlands of Western Washington today ahead of an approaching trough. Friday will be cool and cloudy with some areas of showers or drizzle as the trough moves eastward. An upper ridge will build over the weekend and into early next week for a period of sunny warm weather before another marine push by the middle of next week.

SHORT TERM /TODAY THROUGH SATURDAY/. A shallow marine layer continues to advance into Puget Sound from both north and south, with low stratus and areas of fog continuing for the next couple of hours. With diurnal heating, the lower clouds should begin to mix out, but increasing mid level clouds will advance into Western Washington through the day. Afternoon high temperatures will run 6 to 10 degrees cooler than Wednesday across much of the region. The marine layer will deepen tonight as onshore flow increases with some areas of drizzle or light showers developing overnight into Friday morning. Friday will be the coolest day of the next several, but clouds should break up by late afternoon as upper ridging begins to build back into the area. Heights continue to rise on Saturday as upper ridging gains amplitude offshore. After some brief areas of morning clouds, sunshine returns for Saturday with temperatures bouncing back to near or a little above normal with upper 60s coast and 75 to 80 for much of the interior lowlands.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. The offshore ridge continues to strengthen to round out the weekend. Low level flow will only be weakly onshore on Sunday and this will keep morning clouds limited to the coast. High temperatures will continue their climb with 70s coastal areas and mid 70s to mid 80s interior. By Monday, strong ridging remains in place aloft and thermally induced low pressure at the surface will extend northward from Oregon's Willamette Valley into the Western Washington interior lowlands. Areas from Seattle southward should reach the mid to upper 80s. Tuesday could be much the same as Monday, but low level onshore will be increasing by late in the day. That'll cool the coastal areas, but it's likely to remain quite warm inland. A system passing well to our north will induce a marine push around the middle of next week. Temperatures will cool somewhat with more prevalent morning clouds. But unlike the recent past, we'll see temperatures merely return to seasonal levels with dry conditions continuing. 27

AVIATION. Westerly flow aloft with strengthening low level onshore flow has resulted in widespread marine stratus across much of the northern and southern portions of the Sound this morning. Current conditions are a mixed bag across the terminals, with primarily IFR and even LIFR in areas of fog. Expect ceilings to lift through the day and return to VFR conditions for much of the interior by the afternoon hours, however expect ceilings along the coast to likely remain near MVFR levels through much of the day. Ceilings will lower back down to MVFR again tonight and into Friday morning, with pockets of IFR possible in areas of drizzle, especially along the coast. Onshore flow will strengthen today, so can expect a few gusty winds across the region this afternoon and evening.

KSEA . Some low clouds have crept into the terminal this morning which could lead to a brief reduction in visibility over the next 1-2 hours, however expect VFR ceilings to persist again by late morning. Winds SW 6-8 kts through this morning will strengthen through the afternoon to 8-10 kts gusting to 15 kts. Winds will then ease to 6-8 kts during the late evening and remain SW.

MARINE. Persistent offshore high pressure will remain in place for the next couple of days, with a thermally induced surface trough along the south Oregon coast. This will support persistent north to northwest flow over the coastal waters with the strongest winds during the evening hours as well as through Juan de Fuca. Onshore pressure gradients again support gale conditions developing through the central and eastern strait late this afternoon and evening. Seas over the coastal waters will remain 3 to 6 ft, building in conjunction with the stronger winds and will remain rather steep through much of the week.

HYDROLOGY. The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated as needed until then.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until noon PDT today for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Warning from noon today to midnight PDT tonight for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 4 PM this afternoon to 5 AM PDT Friday for Admiralty Inlet-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
46121 20 mi35 min 1.9 60°F 1018 hPa59°F
TCNW1 - 9446484 - Tacoma, WA 34 mi76 min 57°F
WPOW1 - West Point, WA 50 mi46 min NNE 5.1 G 5.1 60°F 1017.5 hPa (+0.0)60°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Olympia, Olympia Airport, WA9 mi52 minVar 410.00 miOvercast62°F55°F80%1018 hPa
Shelton, Shelton Sanderson Field, WA13 mi53 minW 810.00 miOvercast61°F57°F87%1017 hPa
Fort Lewis / Gray U. S. Army Airfield, WA23 mi49 minS 72.50 miFog/Mist61°F60°F100%1018.2 hPa

Link to 5 minute data for KOLM

Wind History from OLM (wind in knots)
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Last 24hr46N5CalmN73NE5N6N6N8N5N5CalmSE5S4SE4S4CalmCalmS3S3S5SW44
1 day agoNE6E9N13NE9
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NE8N5E6NE7N6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3CalmCalm
2 days ago--5--N74NW4NE5N5E9NE6N6N3CalmCalmCalmCalmCalmCalmCalmCalmCalmN5N45

Tide / Current Tables for Rocky Point, Eld Inlet, Washington
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Rocky Point
Click for Map
Thu -- 01:58 AM PDT     13.27 feet High Tide
Thu -- 02:12 AM PDT     Moonrise
Thu -- 05:33 AM PDT     Sunrise
Thu -- 09:48 AM PDT     0.39 feet Low Tide
Thu -- 05:11 PM PDT     12.52 feet High Tide
Thu -- 05:38 PM PDT     Moonset
Thu -- 09:02 PM PDT     Sunset
Thu -- 09:55 PM PDT     8.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.212.713.312.811.69.67.24.62.30.80.41.33.25.88.410.61212.512.211.19.68.488.6

Tide / Current Tables for Eld Inlet Entrance, Washington Current
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Eld Inlet Entrance
Click for Map
Thu -- 01:34 AM PDT     -0.00 knots Slack
Thu -- 02:11 AM PDT     Moonrise
Thu -- 05:33 AM PDT     Sunrise
Thu -- 05:50 AM PDT     -0.57 knots Max Ebb
Thu -- 09:38 AM PDT     0.00 knots Slack
Thu -- 12:46 PM PDT     0.92 knots Max Flood
Thu -- 04:11 PM PDT     -0.00 knots Slack
Thu -- 05:37 PM PDT     Moonset
Thu -- 07:37 PM PDT     -0.25 knots Max Ebb
Thu -- 09:02 PM PDT     Sunset
Thu -- 10:04 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0.1-0.3-0.4-0.5-0.6-0.5-0.4-0.20.20.60.90.90.70.40.1-0.1-0.2-0.2-0.2-0.2-00.3

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 (13,3,4,5)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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 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.