Thursday, August24, 2017 L-36.com


Marine Weather and Tides
Maywood Park, 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 6:21AMSunset 8:02PM Thursday August 24, 2017 3:37 AM PDT (10:37 UTC) Moonrise 8:35AMMoonset 8:48PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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 Thu Aug 24 2017
In the main channel..Combined seas 3 to 5 ft through Thursday night. However, seas will temporarily build to 7 ft during the strong ebb around 715 am Thursday and during the ebb around 745 pm Thursday.
PZZ200 249 Am Pdt Thu Aug 24 2017
Synopsis for southern washington and northern oregon coast.. High pressure will build across the waters today where it will remain for much of the next week. Thermal low pressure will strengthen across northern california tonight and Friday and result in increasing northerly winds.

7 Day Forecast for Marine Location Near Maywood Park, OR
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location: 45.6, -122.55     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 241021
afdpqr
area forecast discussion
national weather service portland or
316 am pdt Thu aug 24 2017

Synopsis A weak front will bring a chance for some very light
rain, increased clouds, and cooler temperatures today. High pressure
aloft quickly rebuilds across the pacific northwest Saturday, for a
return of very warm temperatures by the end of the weekend. Very war
conditions will remain through the first portion of next week as the
upper level ridge remains in place.

Short term Today through Saturday... Cooler and cloudier for a
change today. An upper trough moving west to east across southern
bc with a trailing surface front brushing the area today. Expect
what little rain that falls to be at the coastal zones this early
this morning. If the front can hold together, it may bring
sprinkles to the northern interior lowland zones as well before the
front dissipates in the cascades. Surface and mid level ridging
quickly rebuilds offshore this afternoon. Shortwave ridging arrives
Friday and should warm temperatures closer to climatological normals
with lots of sunshine. An even warmer day in store across the
interior on Saturday as 500 mb heights climb to near 590 dam and 850
mb temperatures reach near 20 degrees c.

Smoke from fires in southwest oregon and northern california have
reached near 700 mb (~10k ft) the southwesterly flow at that level
will likely continue to bring elevated smoke layer over the se
corner of the CWA today covering mainly lane, linn and marion
counties. more westerly flow develops tonight and Friday so expect
less smoke drifting into our cwa. By later Saturday an open trough
at 700 mb approaches and backs the wind to south to southwest so if
smoke reaches that level it could drift into the CWA again this
weekend. Also 850 mb winds over the weekend turn easterly bringing
smoke from fires in the cascades westward. Mh

Long term No changes. Previous discussion follows... Saturday night
through Wednesday... Temperatures remain rather warm for the start of
next week, with at least a few days reaching into the 90s across the
interior portions of the forecast area. Models have fluctuated a bit
with respect to the placement of the thermal trough through the
weekend, but it appears likely that offshore low-level winds will
develop at some point late Saturday through Monday, which will be
responsible for additional warming. This shift in winds will also
allow some smoke from nearby wildland fires in the cascades to filter
back into the region Sunday and Monday. Have maintained a dry
forecast through the middle of the week for now, though there will
perhaps be a window for some thunderstorms to develop as the upper
level ridge breaks down around midweek.

Cullen

Aviation Building high pressure across the region will produce
primarilyVFR conditions through 12z Friday. However, a weakening
front is currently traversing the region and gradually moistening
the lower atmosphere. This may produce areas of MVFR and possibly
ifr conditions at times between 12-18z Friday. With that said,
restrictions thus far have been rather meager and short lived so
confidence in conditions deteriorating at any given TAF site is
low to moderate at best.

Kpdx and approaches... Building high pressure across the region
will produce primarilyVFR conditions through 12z Friday. In the
meantime, a weak front traversing the region may bring some lower
cigs including MVFR conditions for a few hours this morning, but
confidence is low. Neuman

Marine High pressure will build across the northeast pacific
today where it will remain for much of the next week. Thermal
low pressure strengthening over northern california and southern
oregon will result in northerly winds increasing into small craft
advisory thresholds of 25 kt Friday and Saturday. As thermal low
pressure shifts towards northwestern oregon Sunday and Monday,
winds should back off across the waters and winds in the official
forecast were held just a bit below model guidance for this time
period. Weaker pressure gradients across the waters should result
in even less wind and decreasing seas next week. 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 41 mi49 min 71°F1017.4 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 73 mi49 min 50°F1018.4 hPa
ASTO3 - 9439040 - Astoria, OR 77 mi49 min NNW 6 G 8 60°F 69°F1018.1 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Airport, OR3 mi44 minNNW 610.00 miMostly Cloudy65°F57°F78%1016.5 hPa
Pearson Airfield, WA6 mi44 minNNW 510.00 miMostly Cloudy65°F59°F81%1016.5 hPa
Portland, Portland-Troutdale Airport, OR9 mi44 minNW 510.00 miOvercast66°F57°F75%1016.3 hPa
Scappoose Industrial Airpark, OR20 mi44 minNNW 710.00 miMostly Cloudy63°F53°F70%1016.5 hPa
Portland-Hillsboro Airport, OR22 mi44 minNW 810.00 miMostly Cloudy62°F54°F75%1016.5 hPa

Wind History from PDX (wind in knots)
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Last 24hrN433N5N4CalmW3CalmCalmNE3CalmE5E5E4Calm6NW9NW7NW9NW9
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1 day agoE3E5E3SE3E3E4E3NE4N5E3N6NW6Calm4NW85N6N4N4NW5NW5NW3N4NW5
2 days agoNW53NW3NW3NW3CalmNW5N5NW7W10W11NW9NW10NW8
G14
NW12NW7NW9W9NW6W7W3NW3CalmCalm

Tide / Current Tables for Ellsworth, Washington - IGNORE HEIGHTS
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Ellsworth
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 -- 05:47 AM PDT     0.65 feet Low Tide
Thu -- 06:22 AM PDT     Sunrise
Thu -- 09:35 AM PDT     Moonrise
Thu -- 09:48 AM PDT     8.23 feet High Tide
Thu -- 06:08 PM PDT     -0.50 feet Low Tide
Thu -- 08:01 PM PDT     Sunset
Thu -- 09:48 PM PDT     Moonset
Thu -- 10:30 PM PDT     8.15 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.85.54.12.71.60.90.72.35.17.58.27.86.75.33.72.20.9-0.1-0.50.335.97.98.1

Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
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Vancouver
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 -- 05:22 AM PDT     0.65 feet Low Tide
Thu -- 06:22 AM PDT     Sunrise
Thu -- 09:22 AM PDT     8.23 feet High Tide
Thu -- 09:35 AM PDT     Moonrise
Thu -- 05:43 PM PDT     -0.50 feet Low Tide
Thu -- 08:02 PM PDT     Sunset
Thu -- 09:48 PM PDT     Moonset
Thu -- 10:04 PM PDT     8.15 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.34.93.52.21.20.71.13.46.38.18.17.46.14.63.11.60.4-0.3-0.41.34.36.98.17.9

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 (6,6,7,8)
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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.