Wednesday, December11, 2019
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Marine Weather and Tides
Portland, 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 4:28PM Tuesday December 10, 2019 9:40 PM PST (05:40 UTC) Moonrise 3:46PMMoonset 5:52AM Illumination 100% Phase: Full Moon; Moon at 14 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- 228 Pm Pst Tue Dec 10 2019
.small craft advisory in effect through Wednesday afternoon...
In the main channel.. - general seas...seas around 9 ft Tuesday night then increasing to be between 12 to 15 ft through Wednesday. - first ebb...strong ebb around 330 pm Tuesday. Seas near 12 ft with breakers likely. - second ebb...around 4 am Wednesday, with seas near 14 ft. - third ebb...strong ebb around 4 pm Wednesday. Seas near 17 ft with breakers likely.
PZZ200 228 Pm Pst Tue Dec 10 2019
Synopsis for the southern washington and northern oregon coast.. A front will move through the waters today with a stronger front on Wed bringing gale force winds. The active weather pattern continues through mid week with the possibility of a break late in the week.


7 Day Forecast for Marine Location Near Portland, OR
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location: 45.53, -122.68     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 102305 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 305 PM PST Tue Dec 10 2019

SYNOPSIS. A series of fronts will push across the region over the next several days for rather wet weather with few extended breaks. Snow levels are expected to stay above the Cascade passes through Thursday.

SHORT TERM. This afternoon through Friday . The first of a series of fronts is making its way through the forecast area this afternoon, bringing steady rain and finally increasing vertical mixing enough to rid us of the stagnant air. Rain expected to turn to showers tonight behind the front, creating some breaks in precipitation. There is still a rather large discrepancy in PoPs overnight with some models showing high shower coverage and others indicating a drier period. Although the current trough moves through rather quickly this evening, the next one is right on its heels, so have trended towards slightly higher PoPs.

The next system begins to swing onshore around midday Wednesday with steady rain again spreading inland Wednesday afternoon. The 36 hours between Wednesday afternoon and Thursday evening look like a guaranteed soaker and the most rain we've seen locally in a while. However, with as dry as it's been recently, don't expect any river flooding.

Beachgoers should note that there will be an enhanced threat for sneaker waves Wednesday night through Thursday and conditions may meet criteria for high surf. The impacts of these threats will be rough beach conditions, with general wave run up farther than usual and occasional unexpected individual wave run up even farther. Wednesday night and Thursday won't be good times to be on the beaches or jetties.

Kept a slight chance of thunder in the forecast for Thursday afternoon and expanded it a little bit inland, to the east slopes of the Coast Range. It's not a high confidence thunderstorm pattern, but instability looks decent. Hope to refine thunder threat over the next couple of shifts.

Snow levels are expected to remain above the Cascade passes through Thursday. However, they are likely to drop Thursday night into Friday behind the front. Any need for winter weather headlines in the Cascades will be dependent on when the snow levels drop. Right now snow amounts are marginal for all elevations below 6000 ft except the South Washington Cascades through Friday. Again, will be refining the details over the next couple of shifts. Bowen

LONG TERM. Friday night through Tuesday . The upper air patters remains progressive through the weekend, but without any significant individual systems, expect continuing showers. Snow levels continue to drop, settling at around 2500 ft for Saturday and Sunday. Operational runs of the models seem to be in decent agreement that upper ridging will move over the area starting Monday. From there, there is also general agreement that the ridge won't become the semi-permanent type we've seen over the recent weeks, but the question is how quickly it moves out and the next system approaches. Expect to see about a 24 hour dry period sometime between Monday and Wednesday, followed by a continuing active pattern. Bowen

AVIATION. Widespread stratus will continue through this evening as a front with accompanying rain passes through. Ceilings and visibilities will continue to be a mix of MVFR-IFR through this evening and into tomorrow morning. Winds will shift from easterly to southerly throughout the night. Increased wind gusts around 21Z Wed for the coastal and northern TAF sites. Fog is not expected overnight.

KPDX AND APPROACHES . Current MVFR conditions will continue for KPDX and KTTD as the front passes with rain this evening. VFR visibilities should return late tonight with increasing southerly winds. -BPhillips

MARINE. A cold front will move across the waters today bringing southerly winds gusting to 25 kt. Winds will subside overnight for a brief period of time with seas continuing to stay between 9 to 11 ft until tomorrow afternoon which will continue to the Small Craft Advisory through Wednesday afternoon. Winds will ramp-up Wednesday morning as a strong surface front from a Gulf of Alaska low swings across the waters bringing Gale force winds between 40 to 45 kt Wednesday evening.

There is a general consensus between models that the primary swell will be between 17 to 19 ft between 15 and 17s. Combined wave heights may reach 20 ft in some areas. Seas will generally stay at or above 10 ft through the weekend. Long period swells pose an increased risk for hazardous beaches, please refer to short- term discussion for more information. -BPhillips

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 1 PM PST Wednesday for coastal waters from Cape Shoalwater WA to Florence OR out 60 NM.

Gale Warning from 1 PM Wednesday to 1 AM PST Thursday for coastal waters from Cape Shoalwater WA to Florence OR out 60 NM.

Small Craft Advisory until 4 PM PST Wednesday for Columbia River Bar.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 42 mi59 min 46°F1019.7 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 66 mi59 min 47°F1019.2 hPa
ASTO3 - 9439040 - Astoria, OR 74 mi59 min N 5.1 G 8 43°F 46°F1018.5 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA6 mi48 minVar 54.00 miLight Rain Fog/Mist42°F39°F89%1020.3 hPa
Portland, Portland International Airport, OR7 mi48 minESE 910.00 miOvercast42°F39°F92%1020.3 hPa
Portland-Hillsboro Airport, OR14 mi48 minN 03.00 miLight Rain Fog/Mist44°F42°F93%1019.9 hPa
Portland, Portland-Troutdale Airport, OR15 mi48 minE 137.00 miLight Rain41°F37°F86%1020.4 hPa
Scappoose Industrial Airpark, OR19 mi48 minSSE 54.00 miLight Rain Fog/Mist41°F39°F96%1019.9 hPa
Aurora State Airport, OR20 mi48 minN 05.00 miFog/Mist44°F42°F93%1020.2 hPa

Link to 5 minute data for KPDX

Wind History from PDX (wind in knots)
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Last 24hrCalmSE8SE7SE6S8SE11SE11S5E10E7SE5E6CalmCalmSE5E7E10S6SE9SE8SE9E9SE9SE9
1 day agoCalmNE3CalmCalmE3E3E4SE6E4SE4E7E7E3N3CalmCalmNW6NW5W8CalmSW3CalmSE5SE4
2 days agoCalmE4E4E3CalmCalmE3CalmCalmE4E5E5E8E3NE4N3CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Portland, Willamette River, Oregon - IGNORE HEIGHTS
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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 Vancouver, Washington - IGNORE HEIGHTS
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (0,6,7,8)
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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.