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 4:58 AM PDT (11:58 UTC) Moonrise 5:10AMMoonset 7:21PM Illumination 1% 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- 249 Am Pdt Mon Aug 21 2017
.small craft advisory for rough columbia river bar in effect until 7 am pdt this morning...
In the main channel..Combined seas 3 to 3 ft through Monday. However, seas will temporarily build to around 7 ft with breakers during the very strong ebb around 5 am Monday morning and to 7 ft during the ebb around 530 pm Monday evening.
PZZ200 249 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 211032
afdpqr
area forecast discussion
national weather service portland or
324 am pdt Mon aug 21 2017

Synopsis Onshore flow will produce varying degrees of morning
clouds, afternoon sunshine and inland temperatures in the 70s and
80s for much of the next week. The coolest temperatures will likely
be late Wednesday and Thursday as a weak storm system brings a chance
for a few light showers to the area.

Short term Today through Thursday... Fog product reveals marine
stratus congealing over the waters and pushing onto much of the
oregon and washington coastline. This stratus field is quite shallow
with CIGS generally hovering a couple hundred feet agl. This should
prevent too much inland penetration, but nonetheless, should see some
marine clouds into at least the kelso-longview area by daybreak... And
perhaps even into the eastern pdx metro towards 7-8am. Given little
change in the pressure pattern, wind fields and the solar eclipse
should begin to limit solar insolation around the time stratus
typically begins to dissipate along the coast, suspect those along
the coast that are currently cloudy will remain so through the
duration of the eclipse. The good news is that away from the columbia
river and willapa bay, the marine stratus should not extend more than
a few miles inland. It should be noted that there will be a few
passing high clouds this morning for areas that are not socked in the
marine clouds. However, these clouds should be considerably thinner
and more transparent than the mid-high level clouds observed
yesterday.

Otherwise, expect inland high temperatures to top out in the mid to
upper 80s today and Tuesday. Thunder chances look to remain south and
east of the region Tuesday and Wednesday afternoon and evening. The
next front will approach the region Wednesday and bring cooler
temperatures, increased cloud cover and a chance for some light rain
showers Wednesday night and Thursday. Neuman

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 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 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 mi41 min 71°F1018.8 hPa
ASTO3 - 9439040 - Astoria, OR 29 mi41 min ENE 1.9 G 4.1 60°F 67°F1018.9 hPa
46243 - Clatsop Spit, OR - 162 48 mi29 min 54°F4 ft
46096 48 mi89 min N 14 G 16 51°F 58°F1020.5 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA18 mi63 minNNW 310.00 miFair59°F57°F93%1019.5 hPa

Wind History from KLS (wind in knots)
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Last 24hr3N4N4NW5NW5NW4--65W8W85W8W10W55CalmCalmNW4CalmNW3N3N3N3
1 day agoCalmCalm3N4Calm3Calm566W8NW6W13W13
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2 days agoCalmCalmCalmN43W5W6W6NW7W7W10
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W8W83CalmCalmCalmW3NW44

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 (7,2,3,4)
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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.