Sunday, September24, 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 7:00AMSunset 7:07PM Saturday September 23, 2017 11:54 PM PDT (06:54 UTC) Moonrise 9:37AMMoonset 8:16PM Illumination 13% Phase: Waxing Crescent; Moon at 4 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- 829 Pm Pdt Sat Sep 23 2017
In the main channel..Combined seas will be around 4 ft through Sunday. However, seas temporarily building on Sunday to 5 ft during the ebb around 8 am and to 6 feet during the ebb around 815 pm.
PZZ200 829 Pm Pdt Sat Sep 23 2017
Synopsis for southern washington and northern oregon coast.. High pressure builds over the waters tonight and Sunday. A warm front moves across the washington and northern oregon waters Monday. High pressure returns Tuesday and will persist through much of next week.

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 240343
afdpqr
area forecast discussion
national weather service portland or
842 pm pdt Sat sep 23 2017

Synopsis Expect mostly sunny skies Sunday, other than some morning
coastal stratus. The next front arrives mon, with increasing chance
of light rain. High pressure builds later tue, and remains over the
region through end of next week. This will allow for dry weather,
with above normal temperatures under some offshore flow.

Short term Tonight through Tuesday... An upper level ridge will
move onshore over the pac NW later tonight and Sunday, which will
bring a warm and dry end to the weekend. Satellite imagery shows
mostly clear skies across SW washington and NW oregon tonight.

Northerly winds and upwelling over the waters should allow for at
least some stratus formation over the coastal waters later tonight,
and expect that the coast will be mostly cloudy to start Sun morning.

Although the 00z NAM suggests some clouds over the northern interior
as well, am not nearly as confident that this will occur. However,
there will likely be pockets of radiational fog or low stratus over
the interior lowlands early Sun morning. Otherwise, expect a mostly
sunny day, with afternoon highs generally a few degrees warmer than
today.

As the ridge moves inland sun, it flattens out with a couple of weak
shortwaves moving into wa Sun night and mon. With few clouds and weak
ridging aloft, temps should warm Sun a few degrees over todays highs.

Mid level moisture spreads in Sun night, but with little apparent
lift overall. However, the low level flow turns southerly along the
south wa coast to inject a some low level moisture as the surface
ridge sinks south, so will keep a slight chance for some light rain
there late Sun night. As upper level ridging rebuilds offshore mon
and the surface ridge remains extending inland over far northwest
or, the chances for rain will be slow to spread inland. Lingering
baroclinicity will keep a slight chance for rain over the northwest
part of the forecast area into Mon night.

Mon sees the building upper ridge pushing in closer to the coast. As
a thermal induced surface trough builds up the oregon coast tue,
flow turns offshore for most of the forecast area. This brings
warming temps, and decreasing clouds. Pyle

Long term Upper ridge slowly pushes inland Wed and thu, moving
east towards the northern rockies fri. Low level flow remains
offshore Wed through Fri as the inverted surface trough drifts
offshore and weakens. This will bring warmer than normal temps to
the region including the coast, with the warmest days likely to be
wed and thu. By Fri night models in general agreement with pushing a
weak shortwave through the pacific nw, pushing down upper heights
and allowing a weak cold front to move in. While still likely too
dry to carry any sort of mentionable pop, the flattened flow should
still allow some clouds back in, while cooling temps down a few
degrees.

Aviation Vfr across the region tonight. Return of stratus to
the coastal area will bring return to ifr CIGS to by 07z with
potential for lifr by 09z as winds ease. Weak onshore push will
bring CIGS to around kkls and maybe as far as kpdx. Otherwise,
expect only patchy local stratus at best. WidespreadVFR inland
by 18z, withVFR returning to coast closer to 20z.

Kpdx and approaches...VFR this evening and early tonight, but
about a 35 percent chance of lower MVFR CIGS developing at the
terminal after 15z as stratus pushes up the columbia river.

Cullen

Marine Light north winds continue across the waters Sunday
under high pressure. A front will cross the waters on Monday with
a shift to south winds but speeds generally 15 knots or less.

High pressure then develops over the waters towards midweek, with
a return of north winds and the potential for advisory strength
winds returning by Tuesday night south of cascade head. Seas
remain generally 4 to 6 feet through the first half of next week.

Cullen

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 mi54 min E 1.9 G 2.9 58°F 65°F1019.5 hPa (+0.4)
46243 - Clatsop Spit, OR - 162 26 mi54 min 59°F4 ft
46096 26 mi144 min N 3.9 G 5.8 51°F 58°F1020.2 hPa
TOKW1 - 9440910 - Toke Point, WA 35 mi54 min NNW 1 G 1.9 55°F 61°F1020.1 hPa (+0.0)
LOPW1 - 9440422 - Longview, WA 39 mi54 min 65°F1019.9 hPa (+1.2)
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 45 mi64 min N 5.8 G 5.8 58°F 58°F4 ft1020 hPa (+0.3)56°F

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR14 mi59 minN 010.00 miFair52°F48°F89%1019.6 hPa

Wind History from AST (wind in knots)
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Last 24hrCalmSE3SE3CalmSE3SE3E4E3CalmS3S5CalmSW5N5W8W8W7W8W6W3SW4CalmSE3Calm
1 day agoSE3CalmS3SE5SE4SE4SE5SE4SE3SE3CalmCalmNW4N4W9W8W7W8W7W5SW4SW3SW3S3
2 days agoSE5E3SE4SE4CalmE4SE3E3CalmE4CalmCalmN36SW8NW7NW6N7N5NW4SW4SW3E4SE3

Tide / Current Tables for Harrington Point, Columbia River, Washington
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Harrington Point
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Sun -- 05:13 AM PDT     6.17 feet High Tide
Sun -- 07:04 AM PDT     Sunrise
Sun -- 11:33 AM PDT     1.18 feet Low Tide
Sun -- 11:37 AM PDT     Moonrise
Sun -- 04:57 PM PDT     7.03 feet High Tide
Sun -- 07:07 PM PDT     Sunset
Sun -- 09:48 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.72.44.15.56.165.242.81.91.31.32.23.85.46.676.65.64.22.71.40.5

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Sun -- 05:21 AM PDT     6.76 feet High Tide
Sun -- 07:04 AM PDT     Sunrise
Sun -- 11:36 AM PDT     Moonrise
Sun -- 11:39 AM PDT     1.19 feet Low Tide
Sun -- 05:05 PM PDT     7.59 feet High Tide
Sun -- 07:07 PM PDT     Sunset
Sun -- 09:48 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
00.92.54.45.96.76.65.84.53.221.31.22.13.85.677.67.36.34.83.21.80.7

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 (2,6,7,8)
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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.