Monday, September21, 2020
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Marine Weather and Tides
Troutdale, OR

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:09PM Monday September 21, 2020 8:55 PM PDT (03:55 UTC) Moonrise 11:16AMMoonset 8:53PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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- 212 Pm Pdt Mon Sep 21 2020
In the main channel.. - general seas...around 4 ft this afternoon through Tue. - first ebb...strong ebb around 845 pm Monday, with seas to 8 ft. - second ebb...around 915 am Tue, with seas near 6 ft. - third ebb...strong ebb around 930 pm Tue, with seas to 8 ft.
PZZ200 212 Pm Pdt Mon Sep 21 2020
Synopsis for the southern washington and northern oregon coast.. High pres over the region will push inland on Tue. Rather broad area of strong low pres over the gulf of alaska will send a series of fronts into the pac nw this week. First will arrive on Wed, with southerly gales expected. Another front will arrive on Fri.


7 Day Forecast for Marine Location Near Troutdale, OR
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location: 45.5, -122.39     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 220316 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 814 PM PDT Mon Sep 21 2020

Updated Aviation Discussion

SYNOPSIS. Expect fairly seasonable and mainly dry weather through Tuesday before a more active storm track brings a period of wet weather beginning Wednesday and continuing through at least the end of the work week.

SHORT TERM. Tonight through Thursday . Water vapor satellite imagery shows a weak upper shortwave near 130W moving towards the OR/CA coast. A weak surface trough along the OR/wA coast will push inland this evening as heights build over the waters tonight. There is a slight chance this may provide a few areas with light rain along the northern OR/southwest WA coast and northern parts of the Willamette Valley and Cascade foothills through tonight. Most likely will only see midlevel clouds associated with the upper wave. Expect clouds to continue to increase Tuesday limiting sunshine as temperatures likely will only reach the mid 60s to low 70s.

The first fall weather system for our region this year is expected Wednesday. A strong upper low can be seen in water vapor satellite imagery developing in the southern Gulf of Alaska. Models are in good agreement a strong front will drop southeastward across the area Wednesday bringing gusty winds and heavy rain at times. Recent model runs have slowed the arrival of the frontal system. Rain will likely begin along the north coast late Tuesday with the heaviest rain there expected Wednesday morning into early afternoon. Rain will likely push into the Portland Metro area by Wednesday morning with the higher rainfall rates occurring late Wednesday afternoon through the evening. The rain will continue to move southeast reaching Lane county by Wednesday night. Rainfall amounts will vary across the area with the highest amounts expected across the higher terrain of the Coast Range and parts of the Cascades. Ensemble products are also increasing confidence in a heavy rain event to occur mid-week. NAEFS IVT values around 750 kg/ms coinciding with max precipitable water values around 1.0 to 1.5 inches between 00- 06Z indicate high probability of an atmospheric river with strong upper level synoptic support as well. The front accompanying the atmospheric river will weaken as it shifts southeastward across the area and will be rather transient, so no major hydrology issues are anticipated. Guidance suggests 1-2" of rainfall likely along the coast with the coastal mountains up to 3" or possibly 4" in spots. Valley locations should see at least 0.5 to 1", with some locations up to 1.5".

Along with the front gusty southerly to southwesterly winds will develop ahead of the front Tuesday night into Wednesday morning. Very breezy conditions are expected along the coast with the strongest winds expected Wednesday morning with gusts of 25 to 45 mph expected. While surface pressure gradients are not too impressive, models indicate low level winds around 925mb could mix down with some locations along the coast receiving wind gusts of 45 to 55 mph Wednesday morning through Wednesday afternoon. Behind the front cold air aloft will allow for more convective showers to develop and continued wet conditions. A broad upper level shortwave trough will move towards the Pacific Northwest Wednesday night into Thursday morning. Some deeper instability could result in a few thunderstorms across the waters and along the northern coast during this time.

LONG TERM. Thursday night through Monday . The upper level jet will begin to lift Friday morning as broad upper ridge builds over the Pacific Northwest. A reinforcing shortwave trough will likely result in another round of more widespread showers Friday. Models suggest a compact surface low will move east toward the Oregon coast Friday with more rain and showers expected. Shortwave ridging gradually shifts eastward across the Pacific Northwest over the weekend. This will result in showers decreasing Friday night into Saturday across the area. Sunday looks more to be mostly dry with high temperatures climbing back into the 70s. High pressure will continue to build Monday as temperatures continue to warm. /DDH

AVIATION. Moist southwesterly flow aloft continues overnight, with variable mid and high level clouds. Breaks in the clouds tonight will result in some patchy fog and low level cloud development. Suspect these conditions are more likely along the coast resulting in IFR/LIFR conditions, and inland areas south of Salem resulting in IFR vis, where mid/high clouds will not be as solid. Coastal areas expected to improve to VFR after 19Z Tuesday. Areas south of Salem that develop lower flight conditions will improve after 15Z Tuesday.

Refer to http://weather.gov/zse for detailed regional aviation weather and hazard information.

KPDX AND APPROACHES . Moist southwest flow aloft, with variable mid and high clouds through tonight. Lower VFR CIGS likely later tonight, with moderate potential of MVFR deck around 1500 to 2500 ft between 11Z and 18Z Tuesday. /42

MARINE. Surface pressure gradients not too strong, and with high pressure over the coastal waters, will see winds 10 kt or less tonight into Tue. Seas generally stay at 4 to 6 ft.

Broad area of low pressure over the Gulf of Alaska this week. This will send a series of fronts across the coastal waters and into the Pac NW. First up arrives later Tue night and Wed. Winds gradually pick up over the waters Tue afternoon, with strongest winds not arriving until later Tue night or Wed morning. Good bet will see gusts 30 to 40 kt on the waters at that time. But, would like to wait a tad longer before pulling string on Gale Warning. So, for now, will have Small Craft Advisory on the waters for Tue afternoon and evening, starting on the outer waters first. Then, maintain Gale Watch later Tue night and Wed, again, starting on the outer waters first. Seas build gradually as the wind picks up, with seas to 10 ft later Tue night, and around 15 ft on Wed.

Winds ease back behind the front Wed night, but will maintain breezy conditions at times through Thu. Another front will arrive on Fri, with another round of breezy southerly winds and higher seas. A large westerly swell looks to then move across the waters later this week, which will keep seas in the mid teens and bring a high threat for sneaker waters. /Rockey

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Gale Watch from Tuesday evening through Wednesday evening for coastal waters from Cape Shoalwater WA to Florence OR from 10 to 60 NM.

Small Craft Advisory from 2 PM to 11 PM PDT Tuesday for coastal waters from Cape Shoalwater WA to Florence OR from 10 to 60 NM.

Gale Watch from late Tuesday night through Wednesday evening for coastal waters from Cape Shoalwater WA to Florence OR out 10 NM.

Small Craft Advisory from 8 PM Tuesday to 5 AM PDT Wednesday for coastal waters from Cape Shoalwater WA to Florence OR out 10 NM.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 51 mi61 min 67°F1014.8 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 81 mi61 min 52°F1016.1 hPa
ASTO3 - 9439040 - Astoria, OR 88 mi61 min SSW 8 G 9.9 61°F 65°F1015.1 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland-Troutdale Airport, OR3 mi62 minN 010.00 miSmoke67°F57°F71%1013.8 hPa
Portland, Portland International Airport, OR13 mi62 minNNW 510.00 miMostly Cloudy69°F57°F68%1014.1 hPa
Pearson Airfield, WA17 mi62 minVar 510.00 miPartly Cloudy69°F57°F66%1013.9 hPa

Link to 5 minute data for KTTD

Wind History from TTD (wind in knots)
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Last 24hrCalmCalmSE5E5SE4CalmE3CalmCalmCalmE5CalmE3E3CalmCalmNW53NW4N3NE4CalmE3Calm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm33W4NW453W4W3Calm
2 days agoCalmCalmNE3E3E3CalmCalmCalmCalmCalmCalmCalmCalmSE3SW3Calm3N3NE5E6Calm4CalmCalm

Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
Click for Map
Mon -- 06:23 AM PDT     -0.20 feet Low Tide
Mon -- 06:57 AM PDT     Sunrise
Mon -- 11:01 AM PDT     1.53 feet High Tide
Mon -- 12:17 PM PDT     Moonrise
Mon -- 06:32 PM PDT     0.28 feet Low Tide
Mon -- 07:09 PM PDT     Sunset
Mon -- 09:53 PM PDT     Moonset
Mon -- 11:06 PM PDT     1.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.10.70.50.30-0.2-0.10.30.81.31.51.41.10.80.70.60.50.30.30.61.21.71.9

Tide / Current Tables for Tillamook, Hoquarten Slough, Oregon
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Tillamook
Click for Map
Mon -- 12:12 AM PDT     -0.16 feet Low Tide
Mon -- 05:08 AM PDT     5.95 feet High Tide
Mon -- 07:01 AM PDT     Sunrise
Mon -- 12:10 PM PDT     1.01 feet Low Tide
Mon -- 12:22 PM PDT     Moonrise
Mon -- 04:56 PM PDT     7.12 feet High Tide
Mon -- 07:13 PM PDT     Sunset
Mon -- 09:59 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.10.31.73.65.25.95.85.14.23.12.11.311.42.94.96.57.16.86.14.93.52.21

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
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.