Thursday, September21, 2017

Marine Weather and Tides
Scappoose, 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 6:57AMSunset 7:10PM Thursday September 21, 2017 2:05 PM PDT (21:05 UTC) Moonrise 7:25AMMoonset 7:17PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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- 851 Am Pdt Thu Sep 21 2017
.small craft advisory for rough columbia river bar in effect from 5 pm pdt this afternoon through this evening...
In the main channel..Combined seas 6 to 8 ft today subsiding to 4 to 6 ft tonight. However, seas will temporarily build to around 10 ft with breakers possible during the strong ebb at 630 pm this evening, and to around 8 ft with the ebb at 645 am Friday morning.
PZZ200 851 Am Pdt Thu Sep 21 2017
Synopsis for southern washington and northern oregon coast.. A weak low pressure system will move north to south across the waters through this evening. High pressure builds tonight as weak low pressure remains along the south oregon coast. However, a series of weak lows moving north of the waters will maintain a weak surface pressure gradient through Saturday.

7 Day Forecast for Marine Location Near Scappoose, OR
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location: 45.7, -122.87     debug

Area Discussion for - Portland, OR
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Fxus66 kpqr 212041
area forecast discussion
national weather service portland or
140 pm pdt Thu sep 21 2017

Synopsis Much more tranquil today, even though still have a few
showers around through this evening. High pressure builds in over the
weekend and continues into early next week for some great late
september weather in store for the region, with cool nights with
patchy fog and mild mostly sunny days.

Short term Today through Sunday... The upper level trough that
brought all this rain over the past several days is finally moving
off to the east, with the trough axis now over eastern oregon. On the
back side of the trough, we are seeing northerly flow over western
oregon and washington, maintaining some threat for showers, mainly
over the cascades and coast range. We are seeing this materialize
this afternoon, as showers are now starting to pop up. Showers should
wind down around sunset tonight, with maybe a stray shower or two
hanging around over the cascade crest overnight.

With the cool air mass and light winds tonight, we will see good
conditions for fog. With high pressure starting to build over the
area tonight, this will bring an end to the showers and clear skies
across the area. This will allow more extensive fog to develop
tonight, persisting into Friday morning. Expect pockets of denser fog
to develop as well, with visibilities possibly around 1 4 mile or
less. Motorists should be prepared to slow down tonight and Friday
morning. A cool night and extensive fog will give way to milder
daytime temperatures, with temps mostly around 60 along the coast and
in the mid 60s inland on Friday.

Not much change on Saturday and Sunday, as we maintain light winds
with high pressure over the region. Expect nighttime morning fog, and
cool nights and mild days, though temps will be gradually getting
warmer over the weekend. -mccoy

Long term Sunday night through Friday... High pressure continuing
build into the area. Snow levels will continue to rise as the week
progresses. Temperatures will also start warming back up near normal
during the week. -bishop

Aviation The chances for showers decrease through tonight.

MVFR CIGS are hanging around longer than expected this afternoon.

Satellite imagery shows clearing skies and drier air approaching
from the north, and think there will be mostlyVFR conditions
early this evening. Any clearing will result in low stratus or
radiation fog late tonight into Saturday morning with MVFR or
ifr conditions likely late tonight into Saturday morning.

Kpdx and approaches... A stray shower is possible late this
afternoon and early this evening, but the chances are dwindling.

MostlyVFR conditions expected this evening. Winds will remain
light through Saturday morning. Any clearing tonight will
provide the possibility for radiation fog and MVFR or ifr
conditions early Saturday morning. ~tj

Marine No changes and previous discussion follows... A series
of lows off of the b.C. Coast will maintain 8 to 9 ft NW seas for
the washington and oregon waters through tonight. The seas
should subside to below 6 ft Saturday morning with slight changes
in the swell direction (northwest to west) into next week.

The winds will be light and variable today as a weak low moves
north to south across the waters. Building high pressure will
return light (less than 15 kt) north-northwest winds tonight
through early next week. However, weak lows moving north of the
waters will result in light and variable winds at times, mainly
north of cascade head. The first period of these light winds will
be late Friday morning into early Friday afternoon, with another
one Friday night through Saturday. ~tj

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for rough columbia river bar from 5 pm
this afternoon to 9 pm pdt this evening.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 28 mi48 min 65°F1014.1 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 56 mi48 min 54°F1014 hPa
ASTO3 - 9439040 - Astoria, OR 59 mi48 min NW 2.9 G 4.1 59°F 66°F1013.4 hPa

Wind History for Longview, WA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scappoose Industrial Airpark, OR5 mi73 minVar 310.00 miOvercast56°F46°F72%1014.3 hPa
Portland-Hillsboro Airport, OR12 mi73 minE 410.00 miOvercast55°F48°F80%1014.2 hPa
Pearson Airfield, WA12 mi73 minN 010.00 miOvercast56°F50°F81%1014.4 hPa
Portland, Portland International Airport, OR16 mi73 minN 010.00 miMostly Cloudy56°F48°F75%1014.5 hPa

Wind History from SPB (wind in knots)
Last 24hrNE4N4N4CalmSE4SW4CalmCalmCalmCalmW3CalmCalmCalmCalmNW3CalmCalmCalmCalmSE4E53Calm
1 day agoSW8SW8SW10S9CalmCalmCalmCalmSE3SE3NW3CalmCalmSE4S3S4CalmCalmS3S5S6SW12NW5N6
2 days agoSW8SW84S8S3SE4S5S5S5S4Calm4SE3CalmS5CalmSE4SE3S3S4S6SW10SW8

Tide / Current Tables for Rocky Point, Multnomah Channel, Oregon
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Rocky Point
Click for Map
Thu -- 02:33 AM PDT     0.37 feet Low Tide
Thu -- 06:53 AM PDT     2.48 feet High Tide
Thu -- 06:57 AM PDT     Sunrise
Thu -- 08:25 AM PDT     Moonrise
Thu -- 02:38 PM PDT     0.06 feet Low Tide
Thu -- 07:10 PM PDT     Sunset
Thu -- 07:21 PM PDT     2.76 feet High Tide
Thu -- 08:16 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Kelley Point, Oregon - IGNORE HEIGHTS
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Kelley Point
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 -- 03:57 AM PDT     0.10 feet Low Tide
Thu -- 06:57 AM PDT     Sunrise
Thu -- 08:05 AM PDT     8.18 feet High Tide
Thu -- 08:24 AM PDT     Moonrise
Thu -- 04:12 PM PDT     -0.07 feet Low Tide
Thu -- 07:09 PM PDT     Sunset
Thu -- 08:16 PM PDT     Moonset
Thu -- 08:28 PM PDT     8.43 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of PacificNorthwest    EDIT

Wind Forecast for Portland, OR (17,4,5,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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 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 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.