Friday, July21, 2017 L-36.com


Marine Weather and Tides
Altoona, WA

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 9:38 PM PDT (04:38 UTC) Moonrise 2:05AMMoonset 5:24PM Illumination 7% 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- 822 Pm Pdt Thu Jul 20 2017
In the main channel..Combined seas 1 to 3 ft tonight and Fri. Seas temporarily build to 4 ft with the very strong ebb around 330 am tonight. A second ebb occurs at 4 pm Friday.
PZZ200 822 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 Altoona, WA
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location: 46.27, -123.65     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 210339
afdpqr
area forecast discussion
national weather service portland or
838 pm pdt Thu jul 20 2017

Synopsis Clouds will continue to dissipate across the area this
evening though a few may reform briefly late tonight and early
Friday. Otherwise high pressure will build in behind this system for
less clouds and warming 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 Tonight through Sunday... After a few hundredths of an
inch of rain along the coast earlier today, and spotty light amounts
inland, skies were clearing this evening as the responsible system
was moving well east of our forecast area. The models indicate some
low clouds are possible late tonight and early Friday though they may
be overdone. Best chances could be near the coast and along the
cascade foothills, but they may not be very solid. Some patchy fog is
possible also especially near the coast.

Otherwise sufficient higher pressure will build in for clearer skies
and warmer daytime temps. Temps will be around or just above normal
inland Friday, then close to 90 on Saturday. A system in the SE gulf
of alaska may give the north coast some clouds going into Saturday
but very little elsewhere.

Sunday will be an interesting day meteorologically as we will be in
between a passing system to our north across southern b.C. And a weak
low approaching the northern california coast. This will still be a
pretty warm day inland, and perhaps not bad at the coast as the
onshore flow may not increase until Sunday night and Monday. The low
to our south may get close enough for some late day thunder in our
southern cascade forecast zones. Tolleson

Long term No changes. Previous discussion follows...

Sunday night through Thursday... 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 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 continuing until midday Friday.

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

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 7 to 9 ft, with relatively short
periods, by late Sunday morning. Bowen

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
ASTO3 - 9439040 - Astoria, OR 8 mi51 min W 6 G 8 63°F 70°F1020.4 hPa
46243 - Clatsop Spit, OR - 162 26 mi39 min 60°F2 ft
46096 26 mi129 min NW 3.9 G 3.9 59°F 58°F1021.3 hPa
TOKW1 - 9440910 - Toke Point, WA 35 mi51 min W 2.9 G 4.1 61°F 63°F1021 hPa
LOPW1 - 9440422 - Longview, WA 39 mi51 min 70°F1020.1 hPa
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 45 mi49 min NNW 1.9 G 1.9 61°F 60°F2 ft1020.8 hPa (-0.8)57°F

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR14 mi44 minWNW 410.00 miFair60°F53°F78%1020.5 hPa

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Last 24hrSW5S4S3S3CalmS8S5S6S5SE5S4SW5SW6W9S6SW7W11SW8SW9SW7W5W5W4W4
1 day agoSW4SW5CalmCalmS3CalmSE4SE3SE3SE3SE3Calm3N4N6N8NW9W7W7W7SW8SW9W9SW5
2 days agoNW13NW13NW8W4CalmSE4SE3S4CalmS4Calm5NW6NW7W8NW10NW11NW13NW9NW11NW9NW8NW9NW6

Tide / Current Tables for Harrington Point, Columbia River, Washington
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Harrington Point
Click for Map
Fri -- 04:00 AM PDT     Moonrise
Fri -- 05:44 AM PDT     Sunrise
Fri -- 07:35 AM PDT     -1.54 feet Low Tide
Fri -- 01:24 PM PDT     6.15 feet High Tide
Fri -- 07:18 PM PDT     1.89 feet Low Tide
Fri -- 07:27 PM PDT     Moonset
Fri -- 08:57 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.37.76.44.62.70.9-0.5-1.4-1.4-0.51.33.35.16.165.34.33.32.41.92.13.35.16.9

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Fri -- 04:00 AM PDT     Moonrise
Fri -- 05:44 AM PDT     Sunrise
Fri -- 07:41 AM PDT     -1.15 feet Low Tide
Fri -- 01:32 PM PDT     6.74 feet High Tide
Fri -- 07:24 PM PDT     1.79 feet Low Tide
Fri -- 07:27 PM PDT     Moonset
Fri -- 08:56 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.88.47.15.33.31.50-0.9-1.1-0.21.53.65.46.66.75.94.83.52.51.923.25.17.1

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 (0,6,7,8)
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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.