Monday, January20, 2020
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Marine Weather and Tides
Astoria, OR

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 7:44AMSunset 5:00PM Monday January 20, 2020 3:11 AM PST (11:11 UTC) Moonrise 4:07AMMoonset 1:33PM Illumination 23% Phase: Waning Crescent; Moon at 25 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- 248 Am Pst Mon Jan 20 2020
.small craft advisory in effect through Tuesday evening...
In the main channel.. - general seas....8 to 10 ft building to 12 ft Tuesday morning. - first ebb...around 115 pm Monday. Seas to 13 ft with breakers possible. - second ebb...around 145 am Tuesday. Seas to 16 ft with breakers possible. - third ebb...strong ebb around 215 pm. Seas to 18 ft.
PZZ200 248 Am Pst Mon Jan 20 2020
Synopsis for the southern washington and northern oregon coast.. A cold front ahead of a 985 mb low in the gulf of alaska will move over the waters Mon evening through Tue producing gale force winds. A second frontal system is expected to move across the waters Wednesday. Active weather remains during the week.


7 Day Forecast for Marine Location Near Astoria, OR
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location: 46.19, -123.85     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 201045 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 245 AM PST Mon Jan 20 2020

SYNOPSIS. A weak cold front will bring a chance of rain mainly to coastal areas today. A stronger front arriving Tuesday will bring more widespread rain tonight and Tuesday, along with some gusty winds. A series of fronts through rest of the week will keep the pattern wet with snow in the Cascades.

SHORT TERM. Today through Wednesday . A shortwave was seen in water vapor pictures this morning lifting north-northeast along 140W off the Washington coast. Area radars showed the main area of rain associated with the shortwave and weak surface front about 50 nm off the Washington and north Oregon coast. With the system bringing just a glancing blow to the northwest part of the forecast area, will tend to limit the chances for rain today to the Coast Range and westward, with diminishing chances in the afternoon as the system lifts north.

The next system, a much better organized low that was centered in water vapor imagery near 45N 142W early this morning, is expected to swing east towards the region today and tonight before lifting northeast into British Columbia Tuesday. Models suggest the surface cold front and leading edge of the cold pool aloft reaching the coast before dawn Tuesday, the moving across the forecast area in the morning. Lift is expected to be mostly from the cold front and trough aloft, which coupled with relatively deep moisture should spread an area of rain inland tonight and into Tuesday morning, sufficient to justify categorical pops. Low level moisture and cool air aloft will couple with onshore flow behind the front Tuesday to bring widespread showers to the region, with the most favorable conditions to the orographically favored west slopes of the Coast Range and Cascades. NAM forecast soundings continue to indicate deep enough instability behind the cold front Tuesday to include a slight chance of thunderstorms to the Coast Range and westward. The cold front will lower snow levels again below Cascade passes. The south Washington Cascades will be most favored for significant snowfall Tuesday thanks to orographics associated with a southwest flow, probably not enough to justify a winter storm watch at this point, but ultimately may wind up with advisory level amounts. Chances for showers persist into Tuesday night, but are expected to decrease as the unstable air mass lifts away to the northeast and the areas begins to see some ridging aloft.

Later Tuesday night and into Wednesday a warm front is expected to approach the region from the west, and eventually may push inland late in the day. Models indicate deep moisture and deep layer isentropic lift in the lower and mid levels suggest high pops in order across the forecast area. Snow levels expected to remain below Cascade pass levels most of wednesday, but may begin to rise late in the day as the warm front approaches.

LONG TERM. Wednesday night through Sunday . No changes. Previous discussion follows. Rather progressive pattern with fronts shifting across the region from time to time. This will maintain periods of rain and Cascades snow, though timing of when heavier bands occur still somewhat in question. Overall, a wet period, with snow levels staying between 5000 and 6000 feet. Temperatures stay near seasonal range for mid to late January, with inland highs in the upper 40s to near 50.

AVIATION. Generally VFR with some low stratus sticking around in the southern/central Willamette Valley today. While fog has persisted near KSLE and KEUG, elsewhere, the dewpoint depression is quite large which has kept fog at bay. Winds are continuing to trend more easterly through the northern valley and gorge, however the pressure gradient is beginning to weaken and winds will shift southerly. The high pressure ridge that brought all of the nice weather is beginning to erode as a front ahead of of a closed low in the southern Gulf of Alaska makes its way towards the coast. By 09Z Tue, the frond should arrive increasing winds along the coast and bringing in stratus and precip. At that time, conditions should reduce to MVFR. The increasing pressure gradient through the valley will causing offshore winds to ramp up again creating gusty conditions around the gorge and Portland- Metro around 10Z Mon.

KPDX AND APPROACHES . VFR through 00Z as the front approaches the coast. Cigs should reduce to high MVFR as moisture enters the area. Expect winds to remain offshore with a generally constant speed. Rain is expected with the frontal passage towards the end of the 24-hr forecast period. -Muessle

MARINE. High pressure is eroding as a strong cold front advances towards the coast. This front lies on the leading edge of a 985 mb closed low in the Gulf of Alaska. This system will cause winds to increase to Gale Force Winds starting in the outer waters Mon afternoon, moving over the inner waters (out to 10 NM) by Mon night. A Gale warning has been issued for this system. The strong south-southeasterly flow around the low will increase the wind waves from the south. Much of the significant wave height is going to be wind wave driven with this front.

The most energetic portion of the storm will reach the waters Tue afternoon increasing the westerly swell to 18 ft with a 16 second period. Winds at this time will diminish to small craft level but seas will remain on the high side through Wed morning. In the post frontal environment Wed, zonal flow will take over with westerly winds around 20-25 kt or so. Another round of active weather is in store Wed afternoon through Thu morning with the potential for gale force winds again, specifically in the central waters west of 10 NM. -Muessle

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 4 PM PST this afternoon for coastal waters from Cape Shoalwater WA to Florence OR from 10 to 60 NM.

Gale Warning from 4 PM this afternoon to 10 PM PST Tuesday for coastal waters from Cape Shoalwater WA to Florence OR from 10 to 60 NM.

Small Craft Advisory until 6 PM PST this evening for coastal waters from Cape Shoalwater WA to Florence OR out 10 NM.

Gale Warning from 6 PM this evening to 10 PM PST Tuesday for coastal waters from Cape Shoalwater WA to Florence OR out 10 NM.

Small Craft Advisory until 8 PM PST Tuesday for Columbia River Bar.



Interact with us via social media: www.facebook.com/NWSPortland www.twitter.com/NWSPortland

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
ASTO3 - 9439040 - Astoria, OR 5 mi60 min 48°F 43°F1013.8 hPa
46243 - Clatsop Spit, OR - 162 15 mi42 min 49°F7 ft
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 34 mi82 min SSE 18 G 21 52°F 49°F9 ft1012.7 hPa (-0.6)47°F
TOKW1 - 9440910 - Toke Point, WA 36 mi60 min 49°F 46°F1013.5 hPa
46248 - Astoria Canyon, OR (179) 42 mi42 min 49°F10 ft
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 44 mi60 min 49°F1014.9 hPa
LOPW1 - 9440422 - Longview, WA 48 mi60 min 43°F1015.1 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR3 mi17 minE 410.00 miOvercast48°F41°F77%1013.7 hPa

Link to 5 minute data for KAST

Wind History from AST (wind in knots)
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Last 24hrE6E5E4E7E7E7E7E7E9E8NE7E6E5E3E6SE6E5SE7SE8SE8SE4E4SE3E4
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2 days agoE5NE9E5SE7E5E6E5CalmE5E7SE6S5SE7SE9SE9SE10SE10E10E9SE11SE9SE9E8E5

Tide / Current Tables for Astoria (Youngs Bay), Columbia River, Oregon
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Astoria (Youngs Bay)
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Mon -- 02:49 AM PST     3.12 feet Low Tide
Mon -- 04:07 AM PST     Moonrise
Mon -- 07:50 AM PST     Sunrise
Mon -- 09:07 AM PST     9.40 feet High Tide
Mon -- 01:32 PM PST     Moonset
Mon -- 04:24 PM PST     0.26 feet Low Tide
Mon -- 05:02 PM PST     Sunset
Mon -- 10:40 PM PST     7.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.14.13.43.13.64.86.37.88.99.49.17.96.24.42.61.10.30.41.32.74.35.86.87

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.


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 Portland, OR (6,6,7,8)
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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.