Thursday, September21, 2017 L-36.com


Marine Weather and Tides
Lake Shore, 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 6:56AMSunset 7:09PM Thursday September 21, 2017 6:57 AM PDT (13:57 UTC) Moonrise 7:25AMMoonset 7:16PM Illumination 1% Phase: New Moon; 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- 243 Am Pdt Thu Sep 21 2017
In the main channel..Combined seas 6 ft overnight subsiding to 5 ft Thursday. However, seas will temporarily build to 9 ft with breakers possible during the strong ebbs around 6 am Thursday morning and 630 pm Thursday evening.
PZZ200 243 Am Pdt Thu Sep 21 2017
Synopsis for southern washington and northern oregon coast.. A weak low pressure system near vancouver island will be replaced by high pressure over the next few days and into the weekend.

7 Day Forecast for Marine Location Near Lake Shore, WA
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location: 45.65, -122.77     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 210953
afdpqr
area forecast discussion
national weather service portland or
253 am 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 Saturday... Upper trough now shifting into
eastern oregon and idaho. This is allowing for northerly flow aloft
over western oregon and washington. Will maintain some threat of
showers with the flow, as still some instability, thanks mostly in
part to the proximity of the trough axis. Best threat will remain
over the mountains.

With the cool air mass, and light winds, do have good conditions for
fog. But, still fair amount of mid and high clouds over the region,
so fog will not be widespread. Will have pockets where visibility
will be under a mile, so motorists should be prepared to slow down,
especially along creeks and rivers.

High pressure will gradually build over the region tonight and fri.

This will bring an end to the showers along with clearing skies. But,
this will allow for more extensive fog and or low clouds to form
across the region later tonight, and persisting into Fri am. Cool
nights and areas of fog will give way to mild daytime temperatures,
with mostly 60s along the coast and upper 60s to lower 70s inland.

Not much change on Sat and sun, as will maintain light winds for the
most part as high pres remains over the region. Again, expect
continued cool nights and mild days. Average highs for the interior
lowlands are mostly in the lower to mid 70s and in the 60s on the
coast. So, highs this weekend will not be that far from normal for
mid to late september. rockey.

Long term Sunday night through Wednesday... High pressure will
remain over the area, with mild days continuing. Will see light
offshore flow, which should keep most of the coastal areas free of
fog and clouds. Even inland, any fog will likely be more patchy in
nature, and relegated to the cowlitz valley and in the willamette
valley south of aurora. -bishop

Aviation Ceilings are mostlyVFR this morning with occasional
MVFR CIGS in a few locations. Ifr fog has developed at kuao,
khio, and ksle. Expect ifr fog to develop at other terminals
through the morning.VFR conditions expected by this afternoon
with occasional showers around the area.

Kpdx and approaches... Ifr fog may develop in the next few hours,
but this is highly dependent on clearing developing. Have
trended that direction with this TAF issuance, but if fog does
develop, visibilities will likely go fromVFR to ifr quickly.

Bentley

Marine Will let the final SCA for seas expire at 12z as seas
have mostly dropped below 10 feet and will continue to slowly
drop through the morning. Quiet marine weather is expected
through the rest of the week and into the weekend as typical
summertime northerlies return to the area. The stronger
northerlies associated with the building thermal trough are expected
to stay south of florence through the weekend. bentley

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for hazardous seas until 5 am pdt early
this morning for coastal waters from cascade head to
florence or out 10 nm-waters from CAPE shoalwater wa to
cascade head or from 10 to 60 nm-waters from cascade head
to florence or from 10 to 60 nm.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 33 mi57 min 66°F1012.8 hPa (+1.0)
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 61 mi57 min 55°F1012.8 hPa (+0.4)
ASTO3 - 9439040 - Astoria, OR 65 mi57 min ESE 2.9 G 4.1 53°F 64°F1011.8 hPa (+1.0)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA6 mi64 minESE 410.00 miOvercast50°F50°F100%1013 hPa
Portland, Portland International Airport, OR9 mi64 minSE 410.00 miOvercast49°F48°F97%1013.1 hPa
Scappoose Industrial Airpark, OR10 mi64 minWNW 310.00 miOvercast46°F46°F100%1012.9 hPa
Portland-Hillsboro Airport, OR12 mi64 minNW 30.50 miFog46°F45°F96%1013.1 hPa
Portland, Portland-Troutdale Airport, OR21 mi64 minSW 310.00 miMostly Cloudy51°F48°F89%1013 hPa

Wind History from VUO (wind in knots)
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Last 24hrCalm5S6SW7S9
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SW9SW7N3SE53SE33S3SE3CalmSE3CalmSE3CalmCalmSE3SE3SE5SE4
1 day ago34S7S86S7S7SW7SW8
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SW8W7W64W6Calm4SE3SE5CalmE6E3SE4E4
2 days ago5SW3S4CalmSE5S53S4S55SW8
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5SW8S7S445--4S7S6S7S63

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.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.12.61.30.40.11.44.16.98.27.975.74.22.71.40.4-0.10.73.26.28.28.37.76.5

Tide / Current Tables for Knapp Landing, Washington - IGNORE HEIGHTS
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Knapp Landing
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 -- 03:09 AM PDT     0.10 feet Low Tide
Thu -- 06:57 AM PDT     Sunrise
Thu -- 07:05 AM PDT     8.18 feet High Tide
Thu -- 08:24 AM PDT     Moonrise
Thu -- 03:24 PM PDT     -0.07 feet Low Tide
Thu -- 07:09 PM PDT     Sunset
Thu -- 07:28 PM PDT     8.43 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.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.81.50.50.113.86.78.27.97.15.84.32.91.60.5-00.42.868.18.37.76.55.1

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 (9,2,3,4)
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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.