Thursday, June21, 2018 L-36.com


Marine Weather and Tides
Onalaska, WA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:16AMSunset 9:11PM Thursday June 21, 2018 1:03 AM PDT (08:03 UTC) Moonrise 1:38PMMoonset 1:00AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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- 218 Pm Pdt Wed Jun 20 2018
In the main channel..Combined seas 2 to 4 ft through Thursday night. However, seas temporarily building to 5 ft during the ebbs around 12 am Thursday, 1215 pm Thursday, and 1 am Friday.
PZZ200 218 Pm Pdt Wed Jun 20 2018
Synopsis for the southern washington and northern oregon coast.. High pressure over the ne pacific. A weak disturbance moves over the waters on Thursday. Stronger high pressure rebuilds on Friday and sticks around through the weekend, with thermal low pressure over northern california and southwestern oregon.

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 210329
afdsew
area forecast discussion
national weather service seattle wa
830 pm pdt Wed jun 20 2018

Synopsis Showers and thunderstorms over the mountains are
ending this evening. Onshore flow will bring cooler marine air
inland Thursday and Friday. High pressure aloft will cross the
region this weekend, followed by an upper trough early next week.

Short term Showers and thunderstorms over the mountains are
ending this evening. Marine stratus will spread inland overnight as
marine air pushes into the area. There might be some drizzle along
the coast tonight and Thursday morning. Temps will remain cool on
the coast and drop considerably for the rest of western washington,
with highs in the upper 60s and 70s along the i-5 corridor thu.

Another upper trough will move into western washington Thursday
night and Friday. This feature will be better defined, but will
only bring a chance of light showers to the area -- mainly the
coast, mountains, and eventually in the puget sound convergence
zone Friday evening. Friday will be a bit cooler yet, with highs
mainly in the mid 60s to lower 70s.

An upper level ridge will follow... Starting to impact the area
during the overnight hours Friday night and dry conditions and
warmer temperatures expected for Saturday. Temperatures will
increase only a few degrees with mid to upper 60s expected along the
coast and low to mid 70s in the interior lowlands.

Long term The aforementioned ridge does not last very long over
the area as the ridge axis exiting Saturday night and the feature
itself east of the area by late Sunday morning... Setting up the next
main weather factor over the area... An upper level trough with its
associated low situated well north of the canadian border. Models
still not really syncing up with this feature when it comes to the
details... And precip signatures with both GFS and ECMWF are pretty
weak... So while pops are present in the extended... They are confined
to the northern third of the CWA and only get as high as low-end
chance wording... While partly to mostly sunny skies are expected for
the remainder of the area. This feature will keep temps over W wa
right near seasonal normals... With lowland temps hovering right
around 70 degrees. Smr

Aviation Light southwest flow aloft tonight will become more
westerly Thursday. The air mass is moist and unstable in mid and
upper levels with thunderstorms over the cascades and olympics and
adjacent lowlands. Most convection should die out by sunset at 04z.

Thunderstorms may impact the terminals around puget sound before
then and they are carried in several tafs.

Low level onshore flow will become strong this evening and will
bring a marine layer inland across much of the interior of western
washington for ifr or low MVFR ceilings Thursday morning.

Ksea... Discussion above applies. TAF has a tempo group for thunder
23z-03z. Ceilings will beVFR until after 11z when marine stratus
will bring MVFR ceilings. Northwest wind 4-8 kt this afternoon
becoming southerly 5-10 kt overnight. Chb

Marine Strong onshore flow will develop late this afternoon and
tonight. A gale warning is in effect for the strait, with small
craft advisories for adjacent waters.

Moderate to strong onshore pressure gradients will continue each day
through the weekend. Winds of at least small craft advisory strength
are likely each day in the strait, with gale force winds possible
each day. For now have kept winds 20-30 kt each afternoon and
evening. Chb

Sew watches warnings advisories
Wa... None.

Pz... Gale warning until 5 am pdt Thursday for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisory until 3 am pdt Thursday for admiralty inlet-
northern inland waters including the san juan islands-west
entrance u.S. Waters strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 33 mi46 min 64°F1018 hPa
TCNW1 - 9446484 - Tacoma, WA 54 mi52 min 61°F 53°F1016.3 hPa
TCMW1 - 9446482 - Tacoma Met, WA 54 mi52 min SW 8.9 G 12

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chehalis-Centralia Airport, WA22 mi69 minVar 610.00 miOvercast61°F57°F88%1017.3 hPa

Wind History from CLS (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE64N9N9NW8
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SW9SW74W4W8
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1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalm43SE4E3CalmCalmCalm34CalmCalmCalmCalmCalmCalm
2 days agoCalmCalmW3SW4SW5CalmSW5S7CalmSE6S4S6SW7SW8W75NW94Calm3E5CalmCalmCalm

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

Thu -- 02:01 AM PDT     Moonset
Thu -- 05:20 AM PDT     Sunrise
Thu -- 07:09 AM PDT     1.75 feet Low Tide
Thu -- 11:11 AM PDT     6.71 feet High Tide
Thu -- 02:38 PM PDT     Moonrise
Thu -- 07:11 PM PDT     1.01 feet Low Tide
Thu -- 09:06 PM PDT     Sunset
Thu -- 11:56 PM PDT     8.46 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
87.36.25.13.92.92.11.82.345.76.76.6654321.311.53.45.77.7

Tide / Current Tables for Longview, Columbia River, Washington
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Longview
Click for Map
Thu -- 02:01 AM PDT     Moonset
Thu -- 05:20 AM PDT     Sunrise
Thu -- 05:52 AM PDT     0.45 feet Low Tide
Thu -- 10:40 AM PDT     3.08 feet High Tide
Thu -- 02:38 PM PDT     Moonrise
Thu -- 06:03 PM PDT     -0.35 feet Low Tide
Thu -- 09:06 PM PDT     Sunset
Thu -- 11:25 PM PDT     3.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.22.62.11.510.60.50.81.52.42.932.62.11.50.90.3-0.1-0.4-0.10.823.23.8

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (4,6,7,8)
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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.