Thursday, May24, 2018 L-36.com


Marine Weather and Tides
Westport, 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 2:36 PM PDT (21:36 UTC) Moonrise 2:41PMMoonset 2:31AM Illumination 75% 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 Westport CDP, OR
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location: 46.15, -123.31     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 241632
afdpqr
area forecast discussion
national weather service portland or
931 am 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 today under a south to southwest flow aloft. This pattern
has also resulted in a deep marine layer over southwest washington
and northwest oregon that will be slow to clear today. The low will
move onshore into california tonight and Friday, maintaining the
onshore flow and deep marine layer over the forecast area, and
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 Today through Saturday... A low developing off the
california coast and an upper trough off the b.C. And washington
coasts have resulted in strong onshore flow and a deepening marine
layer with clouds well up into the west slopes of the cascades this
morning. Expect these clouds to be slow to clear inland today, though
they should break up some in the late afternoon and evening. The low
off california will still spread some moisture and instability
northward into the cascades this afternoon and 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, and 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. Temperatures are expected to rise
into the 70s inland on Sunday afternoon. Tolleson

Long term No changes. Previous discussion follows...

Saturday night through Wednesday... The models are in good agreement
with a positive tilt upper ridge over the pacific northwest Sunday in
the wake of the system moving eastward from Saturday, with the
pattern continuing into Monday. The net result is afternoon sunshine
after areas of night and morning low clouds. Temps will likely trend
back toward or perhaps slightly above normal. The models then show a
weak trough moving through after that, the ECMWF possibly getting it
here late on memorial day and Tuesday with the GFS focusing on
Tuesday and Wednesday. This will increase the onshore flow and marine
layer again, with some spotty precipitation possible. Tolleson

Aviation A deep marine layer will result in MVFR CIGS slowly
lifting and scattering out intoVFR thresholds between 19z and 22z
Thursday. There is a chance MVFR CIGS could return to the region
between 09-18z Friday, but models generally suggest the threat is a
bit lower than expected across most of the region.

Kpdx and approaches... A deep marine layer will result in MVFR cigs
slowly lifting and scattering out intoVFR thresholds between 19z and
22z Thursday. There is a chance MVFR CIGS could return between 12-18z
Friday, but models generally suggest the threat is a bit lower than
expected. 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
in the 10 to 20 kt range 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 steeper and larger
seas. 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 19 mi67 min 58°F1017.9 hPa
ASTO3 - 9439040 - Astoria, OR 25 mi67 min NW 2.9 G 6 60°F 60°F1019 hPa
46243 - Clatsop Spit, OR - 162 44 mi67 min 56°F5 ft

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA22 mi41 minVar 610.00 miA Few Clouds68°F55°F63%1018.3 hPa

Wind History from KLS (wind in knots)
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Last 24hrW8W9W115
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6CalmW5W53W3N34CalmNW3NW3NW3CalmW4CalmW546
1 day ago3W7W7W13
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6NW84NW7CalmNE4CalmN3N3NW3CalmCalmNW3NW4CalmNW75NW7W95
2 days agoN10
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N7N3CalmCalmNE3CalmCalmCalmCalmCalmCalmCalmNW44N7NW736N7

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 Skamokawa, Steamboat Slough, Washington - IGNORE HEIGHTS
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Skamokawa
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 -- 03:31 AM PDT     Moonset
Thu -- 05:31 AM PDT     Sunrise
Thu -- 06:10 AM PDT     1.66 feet Low Tide
Thu -- 11:12 AM PDT     7.04 feet High Tide
Thu -- 03:41 PM PDT     Moonrise
Thu -- 06:17 PM PDT     0.91 feet Low Tide
Thu -- 08:50 PM PDT     Sunset
Thu -- 11:53 PM PDT     8.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.975.84.43.12.11.72.13.34.86.376.86.14.93.72.51.50.91.22.54.56.58.1

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 (17,4,5,8)
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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.