Saturday, September23, 2017 L-36.com


Marine Weather and Tides
Onalaska, 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 5:51 AM PDT (12:51 UTC) Moonrise 9:33AMMoonset 8:12PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 235 Am Pdt Sat Sep 23 2017
In the main channel..Combined seas will be around 4 ft through Sat evening. However, seas will temporarily build to 6 ft during the ebb around 730 am Sat. Seas to 6 ft, with breakers possible, are expected with the ebb around 745 pm Sat.
PZZ200 235 Am Pdt Sat Sep 23 2017
Synopsis for southern washington and northern oregon coast.. A weak low pres system will move into N waters Sat. High pres will then build over the waters Sat night and Sun. A warm front moves across the washington and N oregon waters Mon. High pres returns Tue and is expected to last through much of next week.

7 Day Forecast for Marine Location Near Onalaska, WA
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location: 46.51, -122.63     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 231014
afdsew
area forecast discussion
national weather service seattle wa
315 am pdt Sat sep 23 2017

Synopsis A weak north to south moving weather system will brush
the coast today with clouds and a threat of light rain for the coast
and olympics. Another weak system Sunday night and Monday moving
into british columbia should bring more clouds and a chance of light
rain to mainly northern portions of the area. Higher pressure aloft
is expected to build offshore Tuesday into mid week for a return to
sunshine and warmer temperatures.

Short term Current radar shows some showers along the coast this
early morning... Along with a little blob of showers passing over the
san juans at the time of this writing. Models have been pretty
consistent in keeping this activity west of puget sound and aside
for the minor deviation that is the aforementioned blob over the san
juans... Would expect activity today to be limited to the coast and
the olympics. Current satellite reveals nothing in the way of
surprises as the area is pretty socked in with clouds.

Feels weird to say that this is all associated with a slow moving
upper level ridge nudging its way into the area... But there it
is... A dirty ridge if there ever was one. Enough moisture looks to
be over the area for a generally cloudy weekend... Although some
breaks of Sun look to emerge this afternoon east of the sound.

Sunday will see a return of widespread clouds as an embedded
shortwave within the ridge looks to move through the area on
Monday... Bringing with it a returning chance of showers for most of
the area.

But a ridge is still a ridge... Which means the steady warming trend
that models have been advertising the past several runs looks to
remain on track. Widespread highs in the 60s today... With some
locations possibly hitting 70... Will continue to gradually increase
a degree or two for Sunday. The aforementioned shortwave looks to
knock temps down slightly for Monday... But even then high temps in
the mid 60s will be pretty widespread. Although this is slightly
below normal... All in all a pretty cozy start to fall. Smr

Long term It is pretty safe to say that Tuesday is where the
ridge gets its groove back and sheds the dirty moniker. While clouds
will gradually erode throughout the day... The standout will be the
high temperatures as they rise once more to around the 70 mark for
many locations. With clear skies holding court over W wa for the
remainder of the work week... Conditions will continue to warm with
temps peaking on Thursday as many locations find themselves in the
upper 70s. The ridge exits soon afterward and W wa as models start
to coalesce on a solution for Friday and into the weekend of an
upper level trough starting to enter the area. This will bring temps
back down to around 70 in most spots. Models still disagree with
whether or not this will result in precip though... As the GFS proves
the wetter solution bringing precip area-wide while the ECMWF limits
any pops to the northernmost portions of the area. Leaning toward
ecmwf solution at this time. Smr

Aviation Western wa lies in between a trough over the
intermountain west and a ridge offshore. The flow aloft is
northerly. The air mass is dry and stable with mainly mid-high
level clouds over the region. Patchy fog or low clouds may form
early this morning, mainly in the valleys and along the coast.

Light rain is possible along the coast where there is weak warm
air advection. The interior will remain dry. The ridge will shift
inland tonight for dry conditions. 33
ksea... Patchy low clouds or stratus may form early this morning
for brief MVFR conditions. Otherwise, light south winds andVFR
with dry conditions. Surface winds will flip to light northerly
03-06z tonight. 33

Marine High pressure over the NE pacific will maintain light
onshore flow this weekend. A warm front will clip the area on
Monday with possible small craft advisory winds over the coastal
waters. The flow will turn offshore by midweek as a thermal trough
forms along the coast. 33

Sew watches warnings advisories
Wa... None.

Pz... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 33 mi51 min 65°F1018.4 hPa (-0.0)
TCNW1 - 9446484 - Tacoma, WA 54 mi51 min 56°F 56°F1018.2 hPa (+0.4)
TCMW1 - 9446482 - Tacoma Met, WA 54 mi51 min SE 1.9 G 4.1

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chehalis-Centralia Airport, WA22 mi56 minSSW 410.00 miOvercast52°F50°F94%1018.3 hPa

Wind History from CLS (wind in knots)
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Last 24hrCalmS3CalmCalmCalmCalmCalmCalm444CalmNW4NW3CalmCalmCalmCalmCalmCalmSW3SW5SW5SW4
1 day agoSW3CalmS5S6S3SW3CalmCalmCalm3E6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3SW4
2 days agoCalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4CalmSW3S5SW3SW4

Tide / Current Tables for Longview, Washington - IGNORE HEIGHTS
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Longview
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

Sat -- 02:18 AM PDT     -0.04 feet Low Tide
Sat -- 06:34 AM PDT     7.52 feet High Tide
Sat -- 07:00 AM PDT     Sunrise
Sat -- 10:33 AM PDT     Moonrise
Sat -- 02:20 PM PDT     0.94 feet Low Tide
Sat -- 06:33 PM PDT     8.17 feet High Tide
Sat -- 07:06 PM PDT     Sunset
Sat -- 09:14 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.5-00.52.75.37.27.56.95.94.73.42.31.411.43.56.17.98.17.56.453.5

Tide / Current Tables for Longview, Columbia River, Washington
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Longview
Click for Map
Sat -- 01:33 AM PDT     -0.45 feet Low Tide
Sat -- 06:10 AM PDT     3.21 feet High Tide
Sat -- 07:00 AM PDT     Sunrise
Sat -- 10:33 AM PDT     Moonrise
Sat -- 01:11 PM PDT     -0.36 feet Low Tide
Sat -- 06:06 PM PDT     3.98 feet High Tide
Sat -- 07:06 PM PDT     Sunset
Sat -- 09:14 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.4-0.40.31.52.73.22.92.21.50.90.4-0.1-0.3-0.20.82.23.443.62.71.81.20.8

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 Seattle, WA (8,2,3,4)
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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.