Monday, September25, 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 7:01AMSunset 7:05PM Sunday September 24, 2017 9:20 PM PDT (04:20 UTC) Moonrise 10:37AMMoonset 8:48PM Illumination 21% 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- 817 Pm Pdt Sun Sep 24 2017
In the main channel..Combined seas 4 ft tonight and Monday. However, seas temporarily building to 5 ft during the ebb around 815 pm Sunday and to 6 ft during the ebb around 830 am Monday.
PZZ200 817 Pm Pdt Sun Sep 24 2017
Synopsis for southern washington and northern oregon coast.. High pressure remains over the waters tonight. A warm front moves across the washington and northern oregon waters Monday. High pressure then returns Tuesday and will persist through much of the 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 250353
afdpqr
area forecast discussion
national weather service portland or
853 pm pdt Sun sep 24 2017

Synopsis A weak front arrives Monday, with light rain
brushing southwest washington and far northwest oregon. High
pressure builds later Tuesday and remains over the region through
Thursday and possibly next weekend. Temperatures will peak in the
mid-80s under offshore flow.

Short term Tonight through Wednesday... Strong high pressure over
the NE pac is nosing toward the pac NW and will eventually build into
the region later this week. However, a weak frontal system will ride
over the top of the ridge and move onshore tonight and mon. Satellite
imagery shows broken high clouds now streaming onshore. The fcst
models indicate a weak warm front and associated isentropic lift will
move onto the coast overnight, bringing a very slight chance of rain
or drizzle to the north coast and coastal mountains. Expect clouds
will increase through the day, with the remnants of the cold front
coming onshore in the afternoon and evening. The fcst models suggest
a little better chance of rain with the cold front, with the
potential for some light precipitation spreading east of the coast
range. But the best chances will again be for the coast and coast
range. Areas that do see rainfall will see very light totals, on the
order of a trace to a few hundredths of an inch at most.

The upper ridge continues to build north Tuesday then continues to
drift east Wednesday. A thermal trough pushes north along the
cascades Tuesday then drifts westward Tuesday night becoming
established over western oregon Wednesday. This results in easterly
flow across the cascades to the valley with a secondary node of the
thermal trough bringing weaker flow from the valley and across the
coast range to the coast. This will bring temperatures into the
upper 70s Tuesday and into the lower to mid 80s Wednesday.

Additionally, the coast will see temperatures pushing 80 Wednesday
along the north coast where the winds will be most enhanced by the
mt. Hood mt. Adams gap followed by the lower columbia gap. Pyle jbonk

Long term Wednesday night through Sunday... The upper ridge
continues getting pushed east by a high amplitude upper trough
digging well offshore. The surface thermal trough axis will likely
weaken Wednesday night but could still exert enough influence to
hold onshore flow at bay Thursday.

Southwesterly flow aloft dominates the flow by Thursday night with
the ECMWF being the most aggressive at advancing the upper trough
over the area. Both the GFS and euro swing a weak front toward the
area Thursday night and early Friday with the GFS showing the
frontal energy and associated precip dissipating before the front
hits land. Added in some low end pops for Thursday night and Friday
as a slight nod toward the non-zero rain threat, but potential qpf
remains meager at best.

A brief period of zonal flow is in play for Saturday and Sunday from
the combined lifting of the trough and a return of a building ridge
off the california coast. May get another weak shortwave or two
crossing during this time for very low end pop chances, mainly
across the north. Jbonk &&

Aviation Vfr conditions through continue through the evening.

Expect a return of ifr CIGS vsbys along the coast around 08z, but
across interior the coverage of ifr stratus likely similar to
this morning - that is, a few local areas, but lower confidence
in impacts to any particular terminal past kkls khio. Expect any
restrictions inland to return toVFR by 19z Monday, while ifr
conditions likely linger a little longer along the coastal areas.

Kpdx and approaches...VFR conditions this evening and likely
through overnight period. Only 15 percent chance for lower MVFR
to ifr CIGS developing around 12-17z Monday. Cullen

Marine Light north winds continue tonight over the waters. 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 Tuesday, with a return of north winds
and the potential for advisory strength winds returning by
Tuesday night south of cascade head and spreading north early
Wednesday. Seas remain generally 4 to 6 feet through the first
half of the 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 mi62 min ESE 1 G 1.9 60°F 65°F1019.8 hPa
46243 - Clatsop Spit, OR - 162 26 mi50 min 57°F3 ft
46096 26 mi110 min NNW 9.7 G 9.7 52°F 58°F1020.6 hPa
TOKW1 - 9440910 - Toke Point, WA 35 mi62 min NW 4.1 G 6 57°F 62°F1020.5 hPa
LOPW1 - 9440422 - Longview, WA 39 mi62 min 66°F1019.3 hPa
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 45 mi90 min N 7.8 G 9.7 59°F 59°F4 ft1020.6 hPa (-0.0)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 mi25 minWNW 810.00 miMostly Cloudy58°F54°F87%1020.1 hPa

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Last 24hrSE3CalmCalmSE3SE3SE4CalmCalmSE5CalmCalmSE3E3N3N6N7W7NW9NW11NW8NW6W5W4NW8
1 day agoSW3S3CalmSE3SE3CalmSE3SE3E4E3CalmS3S5CalmSW5N5W8W8W7W8W6W3SW4Calm
2 days agoE4SE3SE3CalmS3SE5SE4SE4SE5SE4SE3SE3CalmCalmNW4N4W9W8W7W8W7W5SW4SW3

Tide / Current Tables for Harrington Point, Columbia River, Washington
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Harrington Point
Click for Map
Mon -- 12:17 AM PDT     -0.04 feet Low Tide
Mon -- 06:00 AM PDT     5.72 feet High Tide
Mon -- 07:05 AM PDT     Sunrise
Mon -- 12:10 PM PDT     1.74 feet Low Tide
Mon -- 12:36 PM PDT     Moonrise
Mon -- 05:30 PM PDT     6.74 feet High Tide
Mon -- 07:05 PM PDT     Sunset
Mon -- 10:24 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-00.21.22.84.25.35.75.44.73.72.72.11.723.14.65.96.66.76.153.62.21.2

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Mon -- 12:23 AM PDT     0.14 feet Low Tide
Mon -- 06:08 AM PDT     6.33 feet High Tide
Mon -- 07:05 AM PDT     Sunrise
Mon -- 12:16 PM PDT     1.67 feet Low Tide
Mon -- 12:35 PM PDT     Moonrise
Mon -- 05:38 PM PDT     7.32 feet High Tide
Mon -- 07:05 PM PDT     Sunset
Mon -- 10:23 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.31.42.94.55.86.36.15.24.132.11.71.934.76.27.17.36.75.64.12.71.5

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.