Friday, February28, 2020
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Marine Weather and Tides
Cathlamet, 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 6:51AMSunset 5:57PM Friday February 28, 2020 1:00 PM PST (21:00 UTC) Moonrise 9:21AMMoonset 11:10PM Illumination 28% 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- 257 Am Pst Fri Feb 28 2020
.small craft advisory in effect until 9 am pst this morning...
.small craft advisory in effect from this evening through Saturday morning...
In the main channel.. - general seas...around 8 ft, building to around 10 ft Friday night. - first ebb...around 730 am Friday morning. Seas to 10 ft. - second ebb...around 730 pm Friday. Seas to 13 ft. - third ebb...around 8 am Saturday. Seas to 13 ft with breakers possible.
PZZ200 257 Am Pst Fri Feb 28 2020
Synopsis for the southern washington and northern oregon coast.. High pressure over the waters weakens today as a cold front approaches the area and moves into the waters this afternoon. Unsettled conditions continue over the weekend.


7 Day Forecast for Marine Location Near Cathlamet, WA
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location: 46.2, -123.38     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 281712 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 911 AM PST Fri Feb 28 2020

SYNOPSIS. Clouds will increase today as a cold front approaches. The front will return rain to the coast later today, then rain and mountain snow inland tonight. A cold upper trough will continue showers Saturday into Sunday morning as snow levels lower to around 2000 feet. Thunderstorms and small hail is possible with the showers on Saturday. A series of surface fronts will result in chances for rain through the middle of next week.

SHORT TERM. Today through Sunday . Surface observations showing shallow patchy fog again this morning in the lowlands, likely to lift during the late morning. Some light rain has developed along the south Oregon coast at KOTH, with low clouds spread along the rest of the coast. Latest operational runs of GFS, EC and NAM all suggest a threat for rain to the entire coast today, so will expand chances for rain to coastal areas today.

Remainder of short term discussion unchanged . Satellite imagery shows a cold front developing around 500 miles off of the coast. This front will bring light rain to the coast late this afternoon that will move inland tonight. Cooler air moves in behind the front late tonight and snow levels will lower to around 2000 feet Saturday morning. An upper level trough with a -36C cold core moves over the area on Saturday continuing showers across the region with snow levels remaining around 2000 feet. Instability is sufficient enough to continue a slight chance for thunderstorms west of the Cascades for Saturday. The Cascades and the higher elevations of the coastal mountains and Cascade foothills will likely have accumulating snow tonight and Saturday, but amounts will be shy of advisory conditions and expect minimal impacts.

Showers decrease Saturday night and Sunday as an upper ridge building north of the area pushes the cold upper trough to the southeast. Onshore winds and lingering moisture will however maintain a chance of showers mainly over the higher terrain through Sunday with minimal accumulations. ~TJ

LONG TERM. No Changes Previous discussion follows. Sunday night through Thursday . Models in pretty good agreement in showing a warm front pushing east through the region Sunday night and Monday as the upper heights build behind a departing trough. Isentropic lift and onshore flow combine to bring a good chance for rain to much of the region. Through much of the rest of the week a rather flat ridge slowly moves across the region. The ridge appears flat enough to potentially allow a baroclinic zone to linger over the forecast area, and given inconsistencies with model details, will need to keep a low pop in for most of the week.

AVIATION. A front will move to the coast late this afternoon. Ahead of the front, increasing southwest flow will deepen the marine layer with ceilings expected to rise into MVFR. Coastal sites should expect MVFR criteria to begin around 21Z Fri ahead of the cold front that is expected to push onshore around 03Z Sat. KONP is expected to return to VFR in the post-frontal airmass but KAST will likely stay in MVFR as most of the moisture looks to stay contained north of Tillamook. Inland sites north of KSLE are expected to drop down into solid MVFR ceilings around 10Z. KSLE will most likely experience a mix of low end VFR to MVFR conditions and KEUG will likely stay VFR through the night.

KPDX AND APPROACHES . VFR conditions will persist through the day and into this evening. Rain develops this evening ahead of the cold front but VFR will most likely continue. MVFR criteria is expected around 10Z as the cold front continues to move inland. -BPhillips

MARINE. High pressure weakens through today as the next frontal system approaches the waters. Small craft advisory winds will spread from northwest to southeast as the front moves through the waters. The strongest winds will be in the PZZ270 zone this afternoon through evening. Post-frontal northwest wind gusts to 25 kt can be expected late Fri night through much of Sat. Wind speeds may slightly increase late Sat or Sat evening as a secondary disturbance moves over the waters.

Seas have been over-performing compared to models and expected decay from offshore buoys. Seas to remain around 10 ft so will extend the advisory through this morning. Wave heights build to 15 ft Fri evening and then hold in the 12 to 14 ft range Sat. This will bring an enhanced risk of sneaker waves on the weekend. Seas fall below 10 ft late Sun night, but then reach 10 ft again Tue. The latest wave guidance continue with backing off on the 20+ ft seas that were advertised for late Tue or Tue night. Instead, guidance now shows generally 10 to 12 ft. Weishaar

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 9 AM PST this morning for Columbia River Bar.

Small Craft Advisory from 6 PM this evening to 10 AM PST Saturday 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 21 mi49 min SSW 6 G 12 46°F 44°F1017.8 hPa
LOPW1 - 9440422 - Longview, WA 23 mi49 min 43°F1018.8 hPa
46243 - Clatsop Spit, OR - 162 40 mi31 min 48°F7 ft
TOKW1 - 9440910 - Toke Point, WA 47 mi49 min S 15 G 19 46°F 49°F1017.3 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KKLS

Wind History from KLS (wind in knots)
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Last 24hrCalmN3NW3W4W3W4W3SW3W4W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3N3Calm
1 day agoCalmCalmCalm3CalmSW4CalmCalmNW4NW3NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days ago----------3S5CalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalmCalm

Tide / Current Tables for Cathlamet, Washington - 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 Skamokawa, Steamboat Slough, Columbia River, 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (16,3,4,5)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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.