Monday, August21, 2017 L-36.com


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 6:19AMSunset 8:09PM Monday August 21, 2017 6:38 PM PDT (01:38 UTC) Moonrise 5:09AMMoonset 7:19PM Illumination 0% Phase: New Moon; Moon at 29 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- 212 Pm Pdt Mon Aug 21 2017
.small craft advisory for rough columbia river bar in effect from late tonight through Tuesday morning...
In the main channel..Combined seas 3 to 5 ft the rest of today and tonight. However, seas will temporarily build to around 5 ft during the ebb around 530 pm Monday evening and to 7 ft with breakers likely during the very strong ebb around 545 am Tuesday morning.
PZZ200 212 Pm Pdt Mon Aug 21 2017
Synopsis for southern washington and northern oregon coast.. There will be little change in the marine weather through the next week as high pressure persists over the ne pacific and a thermal trough remains across the southern oregon coast.

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 212105
afdpqr
area forecast discussion
national weather service portland or
204 pm pdt Mon aug 21 2017

Synopsis Onshore flow will produce varying degrees of morning
clouds, afternoon sunshine, with inland temperatures in the 70s and
80s for much of this week. Today and Tuesday will likely be the
warmest days of the work week as a flat upper ridge moves through. A
weak system will bring significant cooling to the forecast area late
Wednesday and Thursday, as well as more clouds and a few light
showers to the forecast area Wednesday night and Thursday. Expect
drying as temperatures warm back to well above seasonal normals
levels next weekend, possibly up into the 90s inland.

Short term Tonight through Thursday... Things settling down after
the eclipse. We posted nice loop of the shadow from goes-16 imagery
on facebook and twitter as it moved through oregon.

Skies are mostly clear this afternoon with some low clouds and fog
hugging part of the coast. Some light offshore flow is transporting
the smoke from the whitewater fire and the fires in eastern lane
county to the southwest into the willamette valley south of about
salem. An upper ridge building into the area will push temps into the
upper 80s to near 90 inland.

The upper ridge shifts east a bit tonight and Tuesday with some
southwest flow aloft developing. This will cause the marine clouds
and fog to spread back onshore along the coast this evening and
tonight, but the inland penetration will be limited Tuesday morning.

The clouds will clear back to near the coastline Tuesday afternoon,
while inland areas will be mostly sunny Tuesday except for local
smoke around. The flow turns onshore inland Tuesday afternoon which
should help decrease the smoke after that. Inland temperatures will
again be very warm Tuesday, in the upper 80s to around 90.

Southwest flow increases Tuesday night and Wednesday as an offshore
system approaches. This will keep the marine layer solid along the
coast, but the models all say there should be a decent push of low
clouds inland Wednesday morning, especially along the columbia river
into the northern valley areas, and possibly in the southern coastal
gap areas into and around eugene. The inland clouds should burn off
in the afternoon, but expect the temperatures inland to cool off
closer to 80.

The system that approaches Wednesday moves through our forecast area
Wednesday night and Thursday for increasing clouds, cooler
temperatures, and a few showers. Temperatures will cool off to below
seasonal normals, with 70s common inland. Tolleson

Long term Thursday night through Monday... Friday will be a
transition day of drying and warming as westerly flow aloft with
slowly building 500 mb heights spreads in, bringing plenty of
sunshine to the area after areas of morning low clouds. The upper
ridge builds over the weekend and should push inland temperatures up
into the 90s over the weekend and possibly into early next week.

Tolleson

Aviation Satellite and surface observations showVFR conditions
inland and the coast this afternoon, which will persist into the
early evening. Models indicate the marine stratus will move back into
the coastal region in the 03-05z time frame with ifr CIGS and vsby
through early tues morning. The inland penetration of the marine
stratus will be similar to this morning, up the columbia river to
near kelso and partially up some coastal river drainages. The stratus
along the coast should retreat back to the coastline mid to late
morning on tues.

Kpdx and approaches...VFR conditions tonight and Tuesday.

Marine A persistent weather pattern will result in little change
in the marine weather the next few days. High pressure will continue
over the NE pacific. Models show winds in the 20-25 kt winds near the
surface this afternoon into early evening. Once we get past this
evening, winds should be below small craft strength through the
remainder of the week before northerlies strengthen again by the
weekend as the thermal trough strengthens again. Seas will remain
small but steep through the period. Dominant periods will remain
between 8 and 10 seconds. Rough bar conditions expected on the
columbia river bar again Tuesday morning with the very strong ebb. Tw

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for winds until 11 pm pdt this evening for
coastal waters from CAPE shoalwater wa to florence or out
60 nm.

Small craft advisory for rough columbia river bar from 4 am to
8 am pdt Tuesday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 56 mi51 min 53°F1015 hPa
ASTO3 - 9439040 - Astoria, OR 59 mi51 min W 1 G 2.9 75°F 69°F1014.7 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scappoose Industrial Airpark, OR5 mi46 minNNW 1110.00 miFair88°F52°F29%1012.8 hPa
Portland-Hillsboro Airport, OR12 mi46 minNE 610.00 miFair92°F54°F28%1012.4 hPa
Pearson Airfield, WA12 mi46 minNW 1010.00 miFair89°F55°F33%1012.5 hPa
Portland, Portland International Airport, OR16 mi46 minNW 1210.00 miPartly Cloudy89°F57°F34%1012.5 hPa

Wind History from SPB (wind in knots)
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Last 24hrNW8NW9NW6NW7NW6NW7NW7NW6N5N4N4N6N7N12N11N9N5N11--N7N9NW11NW12NW11
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2 days agoN10NW11N6N6NW7N5N433CalmNW34NE3N66N8N4N9N8NW7N8
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Tide / Current Tables for Rocky Point, Multnomah Channel, Oregon
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Rocky Point
Click for Map
Mon -- 12:51 AM PDT     0.53 feet Low Tide
Mon -- 05:30 AM PDT     3.00 feet High Tide
Mon -- 06:09 AM PDT     Moonrise
Mon -- 06:19 AM PDT     Sunrise
Mon -- 11:31 AM PDT     New Moon
Mon -- 02:09 PM PDT     -0.27 feet Low Tide
Mon -- 06:43 PM PDT     2.28 feet High Tide
Mon -- 08:08 PM PDT     Sunset
Mon -- 08:18 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.50.81.52.42.92.92.62.11.81.51.20.70.1-0.3-00.71.62.22.32.11.81.51.3

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

Mon -- 02:32 AM PDT     1.47 feet Low Tide
Mon -- 06:09 AM PDT     Moonrise
Mon -- 06:19 AM PDT     Sunrise
Mon -- 06:36 AM PDT     8.92 feet High Tide
Mon -- 11:31 AM PDT     New Moon
Mon -- 03:21 PM PDT     -1.43 feet Low Tide
Mon -- 07:47 PM PDT     7.86 feet High Tide
Mon -- 08:08 PM PDT     Sunset
Mon -- 08:17 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.12.11.61.73.76.48.58.98.275.43.720.4-0.8-1.4-0.91.44.67.17.87.46.45.2

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 (21,6,7,8)
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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.