Thursday, May24, 2018 L-36.com


Marine Weather and Tides
Clatskanie, OR

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:27AMSunset 8:50PM Thursday May 24, 2018 4:30 PM PDT (23:30 UTC) Moonrise 2:40PMMoonset 2:30AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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- 218 Pm Pdt Thu May 24 2018
In the main channel..Combined seas 3 to 5 ft through Friday night. However, seas will temporarily build to near 7 ft during the ebb around 230 am Friday and to near 6 ft during the ebbs around 245 pm Friday and 315 am Saturday.
PZZ200 218 Pm Pdt Thu May 24 2018
Synopsis for the southern washington and northern oregon coast.. High pressure over the northeast pacific and lower pressure over northern california will maintain northerly winds over the waters for much of the next week.

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 242144
afdpqr
area forecast discussion
national weather service portland or
243 pm pdt Thu may 24 2018

Synopsis A low developing off the california coast will continue
to spread some moisture and instability northward into the oregon
cascades this afternoon and evening under a south to southwest flow
aloft. This pattern has also resulted in a deep marine layer over
southwest washington and northwest oregon that was slowly clearing
inland this afternoon. The low will move onshore into california
tonight and Friday, maintaining the onshore flow and deep marine
layer over the forecast area, pushing the threat of thunder east of
the cascades, though some showers will still be possible over the
oregon cascades. Onshore flow will continue Saturday as a weak system
passes by to the north and produces some spotty drizzle, then a
return to dry weather and slightly above normal daytime temperatures
can be expected Sunday into early next week with a more seasonal
night and morning clouds regime. The next weak upper trough is
expected mainly after Monday.

Short term Tonight through Sunday... A low developing off the
california coast and an upper trough off the b.C. And washington
coasts resulted in strong onshore flow and a deepening marine layer
with clouds well up into the west slopes of the cascades that are
slowly clearing inland this afternoon. The low off california was
still spreading some moisture and instability northward into the
cascades this afternoon that will continue this evening.

The low off california will move onshore into california later
tonight and Friday, maintaining the strong onshore flow over
southwest washington and northwest oregon. The main result will be
continued strong onshore flow and marine clouds over the forecast
area Friday. This should also push the threat of thunder east of the
cascades on Friday, though some showers may still work their way
northward into the oregon cascades.

The california low will drift slowly eastward through Saturday as a
piece of the upper trough along the b.C. Coast moves onshore. This
will keep the onshore flow going, with the models show some spotty
precipitation, perhaps drizzle or some light showers, over the
northern part of the forecast are on Saturday, including inland
areas. Suspect this is due to the remains of an associated
dissipating frontal boundary. Saturday will probably only see highs
in the 60s around the area, with the marine clouds likely persisting
through the day.

The low to the south and the weak upper trough move east Saturday
night and Sunday, resulting in some clearing Sunday afternoon after
areas of low clouds Sunday morning under a positive tilt upper ridge
that moves in. Temperatures are expected to rise into the 70s inland
on Sunday afternoon. Tolleson

Long term Sunday night through Thursday... The models are in good
agreement with a positive tilt upper ridge over the pacific northwest
from Sunday continuing over the forecast area on Monday. The net
result will be afternoon sunshine after areas of night and morning
low clouds. Temperatures will likely trend back toward or perhaps
slightly above normal. The models then show an upper trough swinging
through in the mid week period with increased onshore flow, possibly
some spotty light precipitation, and temperatures again dropping a
bit below normal. Tolleson

Aviation A deep marine layer has resulted in a slow dissipation of
MVFR CIGS this afternoon. Onshore flow and a stabilizing lower
atmosphere should allow lower ceilings to congeal overnight with MVFR
conditions probable at many TAF sites after 09z Friday. Coastal taf
sites will likely have the most prolonged period of MVFR conditions
with ifr conditions possible.

Kpdx and approaches... Onshore flow and a stabilizing lower atmosphere
should allow marine clouds to congeal overnight with a good chance
that a period of MVFR conditions will develop between ~12-18z Friday.

Neuman

Marine High pressure over the northeast pacific and lower pressure
over northern california will maintain northerly winds across the
waters for much of the next week. Wind gusts should generally remain
between 10 to 20 kt and seas in the 4 to 7 ft range through the
weekend. Northerly winds will likely increase during the early to
middle part of next week, which will likely create steep and larger
seas approaching 10 ft. Neuman

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 15 mi42 min 59°F1016.9 hPa
ASTO3 - 9439040 - Astoria, OR 29 mi42 min NW 8 G 8.9 59°F 60°F1018.7 hPa
46243 - Clatsop Spit, OR - 162 48 mi30 min 59°F5 ft

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA18 mi34 minWNW 910.00 miFair71°F57°F63%1017.4 hPa

Wind History from KLS (wind in knots)
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Last 24hrW115
G16
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6CalmW5W53W3N34CalmNW3NW3NW3CalmW4CalmW5466W9
1 day agoW7W13
G18
6NW84NW7CalmNE4CalmN3N3NW3CalmCalmNW3NW4CalmNW75NW7W95W8W9
2 days agoN11
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N7N3CalmCalmNE3CalmCalmCalmCalmCalmCalmCalmNW44N7NW736N73W7

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

Thu -- 03:30 AM PDT     Moonset
Thu -- 05:30 AM PDT     Sunrise
Thu -- 07:25 AM PDT     1.66 feet Low Tide
Thu -- 11:59 AM PDT     7.04 feet High Tide
Thu -- 03:40 PM PDT     Moonrise
Thu -- 07:33 PM PDT     0.91 feet Low Tide
Thu -- 08:49 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.27.86.95.84.53.22.31.71.93.14.96.476.864.93.72.61.6112.34.46.6

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

Thu -- 12:09 AM PDT     8.24 feet High Tide
Thu -- 03:30 AM PDT     Moonset
Thu -- 05:30 AM PDT     Sunrise
Thu -- 07:54 AM PDT     1.66 feet Low Tide
Thu -- 12:17 PM PDT     7.04 feet High Tide
Thu -- 03:40 PM PDT     Moonrise
Thu -- 08:02 PM PDT     0.91 feet Low Tide
Thu -- 08:48 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.287.36.253.72.61.91.72.54.25.976.96.35.34.2321.20.91.63.55.8

Weather Map and Satellite Images
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wmap_P
GOES 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.
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Wind Forecast for Portland, OR (19,4,5,8)
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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.