Monday, August21, 2017 L-36.com


Marine Weather and Tides
Clatskanie, OR

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:18AMSunset 8:10PM Monday August 21, 2017 8:55 AM PDT (15:55 UTC) Moonrise 5:10AMMoonset 7:21PM Illumination 0% Phase: New Moon; Moon at 29 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- 812 Am Pdt Mon Aug 21 2017
.small craft advisory for rough columbia river bar in effect from late tonight through Tuesday morning...
In the main channel..Combined seas 3 to 5 ft today and tonight. However, seas will temporarily build to around 6 ft during the ebb around 530 pm Monday evening and to 7 ft with breakers likely during the very strong ebb around 545 am Tuesday morning.
PZZ200 812 Am Pdt Mon Aug 21 2017
Synopsis for southern washington and northern oregon coast.. There will be little change in the marine weather through the next week as high pressure persists over the ne pacific and a thermal trough remains across the southern oregon coast.

7 Day Forecast for Marine Location Near Clatskanie, OR
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location: 46.17, -123.23     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 211540
afdpqr
area forecast discussion
national weather service portland or
840 am pdt Mon aug 21 2017

Synopsis Onshore flow will produce varying degrees of morning
clouds, afternoon sunshine, with inland temperatures in the 70s and
80s for much of the next week. Monday and Tuesday will likely be the
warmest days of the work week as a flat upper ridge moves through. A
weak system will bring significant cooling to the forecast area late
Wednesday and Thursday, as well as more clouds and a few light
showers to the forecast area Wednesday night and Thursday. Expect
drying as temperatures warm back to well above seasonal normals
levels next weekend.

Short term Today through Thursday... Fog channel and early visible
satellite imagery shows the fog and low clouds fairly solid along the
coast, with inland pushes to around kelso along the columbia river,
as well as into and through tillamook, siletz, and yaquina bays.

There are some thins spots near and north of manzanita, near road's
end, and near yachats. The clouds and fog along the coast may not
clear much until the end of the eclipse or early afternoon, but
probably not too far offshore in the afternoon. Inland south of
kelso is mostly clear, though some light east wind is starting to
cause smoke from the whitewater fire east of detroit and the fires
in eastern lane county to drift westward toward the valley. For the
most part, the eclipse will be easily visible inland except close to
the fires. The afternoon will be sunny inland except for some areas
smoke. A warming air mass from a building upper ridge will cause
temperatures to rise into the upper 80s to around 90 except mid 80s
near kelso.

The upper ridge shifts east a bit tonight and Tuesday with some
southwest flow aloft developing. This will cause the marine clouds
and fog to spread back onshore along the coast this evening and
tonight, but the inland penetration will be limited Tuesday morning.

The clouds will clear back to near the coastline Tuesday afternoon,
while inland areas will be mostly sunny Tuesday except for local
smoke around. The flow turns onshore inland Tuesday afternoon which
should help decrease the smoke after that. Inland temperatures will
again be very warm Tuesday, in the upper 80s to around 90.

Southwest flow increase Tuesday night and Wednesday as an offshore
system approaches. This will keep the marine layer solid along the
coast, but the models all say there should be a decent push of low
clouds inland Wednesday morning, especially along the columbia river
into the northern valley areas, and possibly in the southern coastal
gap areas into and around eugene. The inland clouds should burn off
in the afternoon, but expect the temperatures inland to cool off and
be closer to 80.

The system that approaches Wednesday moves through our forecast area
Wednesday night and Thursday for increasing clouds, cooler
temperatures, and a few showers. Temperatures will cool off to below
seasonal normals, with 70s common inland. Tolleson

Long term Thursday night through Monday... Shortwave ridging should
build over the pacific northwest and bring a return to more sunshine
and warming temperatures Friday and Saturday. In fact, some models
suggest another hot spell and dangerous fire weather conditions are
possible late in the weekend and or early next week, but still too
early to say much more than that at this point. Neuman

Aviation No changes... Stratus deck has filled in along the coast
now with ceilings between 200 and 400 feet. Kast has briefly broken
out of the stratus, but expect the stratus to return and remain
through the morning. The biggest question will be how quickly the
stratus clears. Given that 925 and 850 winds are slowly becoming more
ne between now and 18z, expect the stratus to clear quite
quickly... Possibly even in time for the eclipse. However, given the
slower daytime heating due to the eclipse, this may also limit mixing
and cause the stratus to linger longer than otherwise expected.

Kpdx and approaches...VFR conditions through the period. Still a
small possibility of a few scattered clouds this morning near the
terminal, but expect mostly clear skies. Bentley

Marine No changes... A persistent weather pattern will result in
little change in the marine weather the next several days. High
pressure will continue over the NE pacific with a thermal trough of
varying strength along the south oregon coast. This will lead to
small craft strength winds again today in central waters. Winds
should be below small craft strength through the remainder of the
week before northerlies strengthen again by the weekend as the
thermal trough strengthens again.

Seas will remain small but steep through the period. Dominant periods
will remain between 8 and 10 seconds. A rough bar is in effect for
the very strong ebb this morning. Otherwise, no sea driven headlines
should be needed this week. Bentley

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for winds until 11 pm pdt this evening for
coastal waters from cascade head or to florence or out 60
nm.

Small craft advisory for rough columbia river bar until 7 am
pdt this morning.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 15 mi37 min 70°F1019.2 hPa
ASTO3 - 9439040 - Astoria, OR 29 mi37 min SE 1 G 1.9 59°F 69°F1018.9 hPa
46243 - Clatsop Spit, OR - 162 48 mi25 min 58°F4 ft
46096 48 mi85 min N 7.8 G 7.8 49°F 55°F1020.2 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA18 mi59 minNW 310.00 miFair59°F55°F90%1019.8 hPa

Wind History from KLS (wind in knots)
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Last 24hrNW5NW4--65W8W85W8W10W55CalmCalmNW4CalmNW3N3N3N3CalmN3CalmNW3
1 day agoCalm3Calm566W8NW6W13W13
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4CalmNW3N4CalmCalmCalm33N4N4NW5
2 days ago3W5W6W6NW7W7W10
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W8W83CalmCalmCalmW3NW44CalmCalm3N4

Tide / Current Tables for Eagle Cliff, Washington - IGNORE HEIGHTS
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Eagle Cliff
Click for MapNote: The Columbia River is subject to annual freshets. Short range predictions are available at local river forecast centers. The data for stations above Harrington Point apply only during low river stages. There is a tidal influence along most of the

Mon -- 02:53 AM PDT     8.92 feet High Tide
Mon -- 06:09 AM PDT     Moonrise
Mon -- 06:20 AM PDT     Sunrise
Mon -- 11:06 AM PDT     -1.43 feet Low Tide
Mon -- 11:31 AM PDT     New Moon
Mon -- 04:04 PM PDT     7.86 feet High Tide
Mon -- 08:10 PM PDT     Sunset
Mon -- 08:20 PM PDT     Moonset
Mon -- 11:09 PM PDT     1.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.86.28.28.98.47.25.63.71.90.3-0.9-1.4-0.71.54.46.87.97.56.65.33.92.61.61.1

Tide / Current Tables for Stella, Washington - IGNORE HEIGHTS
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Stella
Click for MapNote: The Columbia River is subject to annual freshets. Short range predictions are available at local river forecast centers. The data for stations above Harrington Point apply only during low river stages. There is a tidal influence along most of the

Mon -- 03:12 AM PDT     8.92 feet High Tide
Mon -- 06:09 AM PDT     Moonrise
Mon -- 06:19 AM PDT     Sunrise
Mon -- 11:31 AM PDT     New Moon
Mon -- 11:35 AM PDT     -1.43 feet Low Tide
Mon -- 04:22 PM PDT     7.86 feet High Tide
Mon -- 08:10 PM PDT     Sunset
Mon -- 08:20 PM PDT     Moonset
Mon -- 11:38 PM PDT     1.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.85.37.68.98.77.76.24.42.60.9-0.5-1.3-1.30.53.36.17.77.775.84.43.121.2

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Portland, OR (11,2,3,4)
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Ground Weather Radar Station Portland, OR
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Disclaimer:
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.