Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Westport, 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 5:40AMSunset 8:56PM Thursday July 20, 2017 3:40 PM PDT (22:40 UTC) Moonrise 2:04AMMoonset 5:22PM Illumination 8% Phase: Waning Crescent; Moon at 27 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- 222 Pm Pdt Thu Jul 20 2017
In the main channel..Combined seas 1 to 3 ft tonight and Fri. An ebb current occurs around 3 pm Thu afternoon, then seas temporarily build to 4 ft with the very strong ebb around 330 am tonight.
PZZ200 222 Pm Pdt Thu Jul 20 2017
Synopsis for southern washington and northern oregon coast.. High pres will remain over the coastal waters through Sat for continued benign weather. Northerly winds pick up Sat night and continue into Mon as a trough of low pres develops up the south oregon coast.

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 202158
afdpqr
area forecast discussion
national weather service portland or
258 pm pdt Thu jul 20 2017

Synopsis Clouds will continue to dissipate across the area into
the evening. High pressure will build in behind this system tonight
for less clouds and warmer temps Friday and Saturday. Strengthening
onshore flow is expected to bring a gradual cooling trend back to
near normal temps Monday and Tuesday. Longer range forecast models
hint at the potential for an upper trough with below normal temps
toward the middle of next week.

Short term Today through Saturday... Accumulating rain has been
mostly confined to the coast and higher elevations. The only
exceptions were kelso, mcminnville, and vancouver, where one
hundredth fell. The portland airport has only received a trace so far
and while an isolated shower cannot be ruled out in the next few
hours, it is unlikely, which means pdx will likely continue the dry
streak. Otherwise, the stratocumulus deck is slowly eroding from se
to NW across the area and most locations will be mostly sunny by
later this afternoon and into the evening.

High pressure will build in behind this front tonight and Friday,
while the air mass warms aloft. Flow will remain onshore Friday, but
not nearly as strong as today. The marine layer will likely become
shallower as 500 mb heights rise and compress marine inversions. As a
result, expect less in the way of low clouds Fri morning. Much of the
willamette valley may start off sunny Friday, aside from a few clouds
spreading up the columbia to near pdx. 00z 850 mb temps rise from
about +8 deg c at salem this afternoon, to +13 deg c by late fri
afternoon, and to +16 deg c Sat afternoon. The combination of warmer
temps aloft, limited morning low clouds, and weaker onshore flow
should result in significantly warmer days Friday and Saturday. Temps
will likely rise back to near normal or slightly above normal Friday,
with the warming trend continuing into Saturday for highs approaching
90 inland. Coastal areas will remain seasonably cool with more
persistent cloudiness as enough onshore gradient will remain for
afternoon and evening seabreezes. Weagle bentley

Long term Saturday night through Wednesday... Models are starting
to come into better agreement in how to handle a weak upper low that
is expected to shear off from the tail end of today's cold front in
the general vicinity of 35n 135w, though there are still small
differences in the details. Both the GFS and ECMWF now show the upper
low cutting off west of the california coast and then lifting NE into
oregon by Monday night. This will leave a slight chance of afternoon
and evening thunder Sunday and Monday for the cascades south of
around santiam pass. Flow aloft generally remains s-sw ahead of the
weak upper low trough, which should keep thunder chances limited to
the cascade crest and points east. Troughing persists through the
second half of the week which will keep temperatures at or below
normal. Weagle bentley

Aviation Clouds remained over much of NW or and SW wa early this
afternoon west of the cascades, but CIGS were improving and were
largelyVFR with just a few areas of MVFR remaining. ExpectVFR
conditions to prevail over the interior tonight and fri. Over the
coastal areasVFR conditions will dominate through early tonight,
but expect areas of ifr or low end MVFR conditions to develop after
09z as some stratus and fog develops, and continues until
midday.

Kpdx and approaches...VFR conditions tonight and fri. The chances
for MVFR CIGS to redevelop late tonight or Fri morning between 12z
and 17z are around 10 percent.

Marine A ridge of high pres over the coastal waters will persist
into sat. As a result, wind and sea conditions will remain benign
through Saturday. Northerly winds will increase with gusts into the
25 to 30 kt range Saturday night, and continue through Monday. Seas
will respond by building to 8 to 10 ft, with relatively short
periods, by late Sunday morning.

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 mi41 min 70°F1021.8 hPa (+0.0)
ASTO3 - 9439040 - Astoria, OR 25 mi41 min W 9.9 G 11 64°F 69°F1022 hPa (+0.0)
46096 43 mi131 min S 5.8 G 5.8 56°F 55°F1022.5 hPa
46243 - Clatsop Spit, OR - 162 44 mi41 min 65°F2 ft

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA22 mi45 minNNW 610.00 miOvercast67°F55°F68%1022.5 hPa

Wind History from KLS (wind in knots)
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Last 24hr5W10W10NW8NW8NW734NW4--CalmSE3CalmS4S5SE3S43S6SE4CalmE3E3NW6
1 day agoW11NW9NW11
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NW7NW6W5W4CalmNW3N4CalmCalmCalmNW3CalmCalmCalmW3W5CalmCalm3NW7
2 days agoN6
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6NW33CalmCalmNE3CalmN3NW3--CalmN3NW3333W64W9

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 -- 12:16 AM PDT     8.95 feet High Tide
Thu -- 03:04 AM PDT     Moonrise
Thu -- 05:41 AM PDT     Sunrise
Thu -- 08:48 AM PDT     -0.63 feet Low Tide
Thu -- 01:48 PM PDT     6.68 feet High Tide
Thu -- 06:21 PM PDT     Moonset
Thu -- 08:25 PM PDT     2.28 feet Low Tide
Thu -- 08:56 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.98.87.96.54.83.11.60.4-0.4-0.60.42.34.56.26.76.35.44.53.52.82.32.546.2

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 -- 03:05 AM PDT     Moonrise
Thu -- 05:42 AM PDT     Sunrise
Thu -- 07:32 AM PDT     -0.63 feet Low Tide
Thu -- 01:01 PM PDT     6.68 feet High Tide
Thu -- 06:22 PM PDT     Moonset
Thu -- 07:09 PM PDT     2.28 feet Low Tide
Thu -- 08:57 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.88.16.64.831.50.2-0.5-0.50.62.44.466.76.35.54.43.42.72.32.74.26.28

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 (18,4,5,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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.