Saturday, February29, 2020
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Marine Weather and Tides
Chinook, 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 6:55AMSunset 6:00PM Friday February 28, 2020 10:42 PM PST (06:42 UTC) Moonrise 9:23AMMoonset 11:12PM Illumination 32% Phase: Waxing Crescent; Moon at 6 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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PZZ210 Columbia River Bar- 222 Pm Pst Fri Feb 28 2020
.small craft advisory in effect from 6 pm pst this evening through Saturday evening...
In the main channel.. - general seas...around 8 ft, building to around 10 ft Friday night into Saturday morning. - first ebb...around 730 pm Friday. Seas to 11 ft. - second ebb...around 8 am Saturday. Seas to 13 ft with breakers possible. - third ebb...around 815 pm Saturday. Seas to 14 ft with breakers possible.
PZZ200 222 Pm Pst Fri Feb 28 2020
Synopsis for the southern washington and northern oregon coast.. Cold front approaches the area this evening bringing gusty conditions and a chance of Thunderstorms. High pressure builds Monday.


7 Day Forecast for Marine Location Near Chinook, WA
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location: 46.27, -123.95     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 290545 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 944 PM PST Fri Feb 28 2020

Updated aviation/marine

SYNOPSIS. A cold front will move southeast through western Washington and Oregon Friday evening bringing a period of rain and a cooler air mass. Showers, and possibly a few thunderstorms will follow later tonight through Saturday night as a cold trough of low pressure aloft moves across the region. A lingering frontal boundary will result in a continued chance for rain through the middle of next week.

SHORT TERM. Tonight through Sunday . Radar and satellite showed a cold front approaching the coast Friday afternoon, which is expected to move across the forecast area this evening. While fairly narrow, there appears to be deep enough low level moisture to stick with high pops for a several hour period during frontal passage. The following upper trough is rather cold and expected to move across the region late Saturday and Saturday night. Model soundings continue to show a rather deep layer of instability extending up above 500 mb as the cold core passes through, with lapse rates suggesting a chance for thunderstorms and small hail across much of the region. Snow levels expected to drop down into the range of the Coast Range and Cascade Foothills early Saturday, and remain low into Sunday. While some snow accumulations appear likely, amounts generally expected to fall short of any sort of winter weather advisory criteria as the low level flow quickly weakens and turns northerly limiting orographic effects.

By Sunday the depth of the unstable layer is much reduced as subsidence begins under ridging aloft. This will greatly reduce chances for showers, restricting chances primarily to the Cascades and Coast Range. Sunday night and Monday sees the approach of a warm front and a return to a stable onshore flow, bringing an increase in clouds and chances for rain. Model time-height cross sections continue to show moisture primarily in the low levels below 850 mb, with best isentropic lift evident along the 290K isentrope.

LONG TERM. Monday night through Friday . Models tending to keep a baroclinic zone over the region through Wednesday night under a zonal flow aloft, so will need to keep a chance for rain through midweek. Best chances will tend to be across the northern parts of the forecast area. By Thursday models still in fairly good agreement with the general pattern, which is shown amplifying in response to a digging trough near 140W. This appears likely to result in a drier and warmer day on Thursday, followed by increasing chances for rain by Friday as the trough approaches the coast and pushes a cold front inland.

AVIATION. A cold front moving across the area this evening is pushing in a cooler and more showery airmass that will generally bring VFR conditions with temporary and generally brief bouts of MVFR conditions through 06z Sunday. There is a slight chance of a thunderstorm at just about any taf site Saturday, but the highest chances will be across the inland taf sites between 20z Saturday and 02z Sunday.

KPDX AND APPROACHES . An increasingly cold and unstable airmass will bring predominantly VFR conditions with occasional showers through 06z Sunday. Occasional and temporary MVFR conditions will be possible throughout much of the taf period, but these should generally be tough to predict much in advance and will generally be limited in duration. There is a slight chance of a short-lived thunderstorm impacting the terminal primarily between 20z Saturday and 02z Sunday. /Neuman

MARINE. Small craft advisory level wind gusts of 20 to 30 kt will gradually wane from south to north across the waters late tonight and Saturday. Will keep the Small Craft Advisory going through 12z Sunday, though, as seas are expected to build into the mid teens later tonight before gradually fading down into the 10-12 ft range Saturday night. Wind gusts may temporarily spike up again Saturday night into Sunday, but there's some uncertainty if they will exceed 20 kt. The more likely scenario is that seas will continue to remain near or above 10 ft through Sunday before eventually subsiding below 10 ft Sunday evening. While there will likely be a lull in winds and seas early next week, the next approaching storm system appears likely to push seas back up into the teens Tuesday or Wednesday. /Neuman

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 4 AM PST Sunday for coastal waters from Cape Shoalwater WA to Florence OR out 60 NM.

Small Craft Advisory until 10 PM PST Saturday for Columbia River Bar.



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This discussion is for Northwest oregon and Southwest Washington from the Cascade crest to 60 nm offshore. This area is commonly referred to as the forecast area.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46243 - Clatsop Spit, OR - 162 10 mi43 min 46°F11 ft
ASTO3 - 9439040 - Astoria, OR 11 mi61 min SSW 14 G 22 45°F 44°F1016.2 hPa
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 30 mi53 min W 21 G 27 47°F 48°F11 ft1016.3 hPa (+0.0)40°F
TOKW1 - 9440910 - Toke Point, WA 30 mi61 min W 14 G 23 47°F 48°F1014.9 hPa
46248 - Astoria Canyon, OR (179) 38 mi43 min 49°F12 ft
46211 - Grays Harbor, WA (036) 44 mi43 min 48°F12 ft
WPTW1 - 9441102 - Westport, WA 45 mi67 min WSW 28 G 34 46°F 48°F1013.7 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 49 mi55 min 50°F1019.2 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR8 mi1.8 hrsSSW 1110.00 miOvercast47°F39°F77%1016.3 hPa

Link to 5 minute data for KAST

Wind History from AST (wind in knots)
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Last 24hrW4NW3W4N3CalmNW4CalmSE3SE4SE6SE4E3E3S8--SW15
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1 day ago3N3CalmE3N5CalmNE4E5--CalmCalm3CalmN7N8N6W7W6W5NW6W8W9W3W6
2 days agoE3SE4SE6CalmSE3CalmCalmCalmCalmCalmSE3E4N6CalmNE4N6N5N4N6N4W4W5NW5S3

Tide / Current Tables for Chinook, Baker Bay, Washington
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Columbia River entrance (N. Jetty), Washington
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Columbia River entrance (N. Jetty)
Click for Map
Sat -- 03:41 AM PST     7.26 feet High Tide
Sat -- 06:56 AM PST     Sunrise
Sat -- 09:46 AM PST     Moonrise
Sat -- 10:06 AM PST     1.56 feet Low Tide
Sat -- 04:31 PM PST     5.50 feet High Tide
Sat -- 06:01 PM PST     Sunset
Sat -- 09:48 PM PST     2.44 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.95.36.47.17.26.75.542.71.91.61.72.43.34.355.45.454.13.22.62.42.8

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (1,6,7,8)
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Ground Weather Radar Station Portland, OR
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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.