Saturday, December7, 2019
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Marine Weather and Tides
Astoria, OR

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:38AMSunset 4:27PM Saturday December 7, 2019 8:50 PM PST (04:50 UTC) Moonrise 2:30PMMoonset 2:42AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 229 Pm Pst Sat Dec 7 2019
In the main channel.. - general seas...seas 5 to 6 ft through Monday. - first ebb...around 145 am Sunday, with seas near 8 ft. - second ebb...around 215 pm Sunday, with seas near 8 ft. - third ebb...around 230 am Monday, with seas 8 ft.
PZZ200 229 Pm Pst Sat Dec 7 2019
Synopsis for the southern washington and northern oregon coast.. High pres will build over the offshore waters tonight and Sunday. This high will shift inland over the pac nw early next week. NExt low will approach the region later next week, with increasing seas and winds.


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 080424 AAA AFDPQR

Area Forecast Discussion . Updated National Weather Service Portland OR 823 PM PST Sat Dec 7 2019

Updated Aviation Discussion

SYNOPSIS. An upper level low pressure approaching California will produce periods of light rain across the area today into tonight before drier weather and valley fog return Sunday into at least early Tuesday.

SHORT TERM. Today through Monday . Water vapor satellite imagery this morning depicts a shortwave trough sagging southeastward across the Pacific Northwest. The main closed low pressure associated with this shortwave trough is currently approaching the northern California coast. A secondary wave is dropping southeastward along the British Columbia coastline and will be main mechanism that will help to push the current wet weather southeast of the area later tonight and Sunday.

In the immediate short term, an area of mid level deformation is setting up across our northwestern zones, generally along a line extending between Newport and the southwest Washington Cascades. This will likely continue to provide a focus for light, but steady rain into this afternoon across this region. Models are in general agreement this area of mid level deformation will weaken as it slowly sags southeastward across the area late this afternoon into this evening. As a result, the inherited PoP forecast of rain chances decreasing from northwest to southeast tonight into Sunday morning looks on track.

In addition, temperatures have been hovering right around freezing in the upper Hood River valley this morning, albeit mainly just on the warm side of the freezing mark. Based on public and ODOT reports, went ahead and canceled the Winter Weather Advisory given no freezing rain impacts were observed to this point and temperatures should only moderate further today.

Otherwise, a sharp and highly amplified shortwave ridge will build northward across the eastern Pacific late Sunday before shifting eastward across the area Monday. This will likely produce strong inversions and enable plenty of valley fog and low clouds to develop. Given the weak surface winds expected, thinking some areas of the Willamette and lower Columbia River valleys may not clear and high temperatures could struggle to reach the low to mid 40s. As a result, have held Monday high temperatures a bit below most model guidance.

The next weakening front still looks on track to bring a good chance for some light rain to the area Tuesday, particularly for our coastal zones. /Neuman

LONG TERM. Tuesday night through Saturday . Another active pattern is in store as another broad low advances towards the area from the Gulf of Alaska later next week. Before that low reaches the area, a shortwave trough and associated front will move over northwest Oregon/southwest Washington Tue night. The front will cause a southerly wind shift which will bring warmer air up from the south keeping temperatures in the 40s to 50s with overcast skies. Precipitation, mainly as rain, will fall Wed afternoon into the evening with increased chances along the coast. Thur will be the brief lull between this frontal passage and the onset of the broad low. At this time, there is a lack of model consistency in the low position and intensity. While all models are depicting a fairly energetic system, models have struggled to create a well defined low center and there is a wide output spread between models and their different runs;thus after Thur, there is less confidence. /Muessle

AVIATION. Moisture left behind by the passage of the weak system today, has resulted in a mixture of MVFR, IFR and LIFR conditions. These conditions are expected to last through 20Z Sunday across the entire CWA. Areas with MVFR conditions are expected to fall to at least IFR through the next few hours, with some areas potentially developing into LIFR conditions. There should be some improvement into a mix of MVFR and VFR conditions starting around 20Z Sunday for coastal locations, and inland locations starting around 00Z Monday. However, confidence in this timing is low.

KPDX AND APPROACHES . MVFR conditions expected to fall to IFR over the next few hours. Moderate confidence in LIFR conditions developing over night, but timing of the LIFR conditions will be difficult. Improvement to MVFR and VFR conditions is expected starting around 00Z Monday, but confidence in the timing is low. /42

MARINE. Broad low pressure in the Pacific is beginning to erode as the associated front pushes inland Saturday. Seas are subsiding from near 10 ft to 6 to 8 ft through Sun. A weak high pressure ridge will build in behind the low on Sun night through Mon which will keep seas near 7 ft with a northwest swell of 6 ft 13 seconds through Wed. The next major system will start advancing towards the waters mid week. A shortwave trough and associated front will move over the waters causing gusty southerly winds to 30 kt. Seas will start to build Wed night to near 13 ft with a 10 to 12 ft westerly swell. A large low, stemming from the Gulf of Alaska, will approach the waters Wed night. At this point, seas could build up to 16 ft or so, but there is some uncertainty in the models so went a bit more reserved with conditions. -Muessle

PQR WATCHES/WARNINGS/ADVISORIES. OR . Air Stagnation Advisory until noon PST Tuesday for Cascade Foothills in Lane County-Central Willamette Valley-Greater Portland Metro Area-Lower Columbia-Northern Oregon Cascade Foothills-South Willamette Valley.

WA . Air Stagnation Advisory until noon PST Tuesday for Greater Vancouver Area-I-5 Corridor in Cowlitz County-South Washington Cascade Foothills.

PZ . None.



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 nautical miles 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 mi50 min SE 1.9 G 2.9 48°F 46°F1008.3 hPa (+1.7)
46243 - Clatsop Spit, OR - 162 15 mi50 min 48°F7 ft
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 34 mi60 min N 3.9 G 5.8 49°F 48°F8 ft1008.8 hPa (+1.6)49°F
TOKW1 - 9440910 - Toke Point, WA 36 mi50 min Calm G 0 49°F 47°F1008.9 hPa (+1.4)
46248 - Astoria Canyon, OR (179) 42 mi50 min 49°F8 ft
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 44 mi50 min 48°F1008.7 hPa (+1.8)
LOPW1 - 9440422 - Longview, WA 48 mi50 min 46°F1008.7 hPa (+1.5)

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR3 mi55 minWNW 310.00 miOvercast48°F46°F96%1008.5 hPa

Link to 5 minute data for KAST

Wind History from AST (wind in knots)
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Last 24hrE3E4E9E5E4E3E3E4SE3E3NE3CalmN3CalmNE4NE5NE6NE6E4NE4NE5CalmCalmNW3
1 day agoE6E7E5E6E6E6E9E7E6E8NE5NE6E8E8E5CalmE5E5SE4NE4E3E7CalmCalm
2 days agoCalmCalmCalmE4CalmCalmCalmCalmCalmCalmSE3CalmSE3CalmE4S6NE4NE4NE5E5SE5E7NE4E4

Tide / Current Tables for Astoria (Youngs Bay), Columbia River, Oregon
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Astoria (Youngs Bay)
Click for Map
Sat -- 02:42 AM PST     Moonset
Sat -- 03:12 AM PST     2.38 feet Low Tide
Sat -- 07:43 AM PST     Sunrise
Sat -- 09:37 AM PST     8.49 feet High Tide
Sat -- 02:30 PM PST     Moonrise
Sat -- 04:19 PM PST     1.65 feet Low Tide
Sat -- 04:29 PM PST     Sunset
Sat -- 10:17 PM PST     6.84 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.73.62.82.42.63.54.86.27.58.38.47.76.44.93.52.31.71.82.63.85.16.26.86.6

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 (23,6,7,8)
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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 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.