Sunday, March26, 2017

Marine Weather and Tides
Onalaska, WA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:00AMSunset 7:34PM Saturday March 25, 2017 10:32 PM PDT (05:32 UTC) Moonrise 4:59AMMoonset 3:55PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 915 Pm Pdt Sat Mar 25 2017
.small craft advisory for rough columbia river bar in effect from Sunday afternoon through Sunday evening...
In the main channel..Combined seas 6 to 8 ft tonight subsiding to 5 to 7 ft Sunday morning before increasing to 7 to 9 ft Sunday afternoon. However...seas will temporarily build to 9 ft with breakers possible during the ebb around 430 am...and to near 11 ft with breakers during the strong ebb around 445 pm Sunday.
PZZ200 915 Pm Pdt Sat Mar 25 2017
Synopsis for southern washington and northern oregon coast.. High pres moves east of the waters tonight. A strong cold front will arrive Sun bringing several hours of gale force winds. Weak high pres returns to the waters Sun night and Mon...followed by another frontal system Tue into Wed.

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 260425
area forecast discussion
national weather service seattle wa
925 pm pdt Sat mar 25 2017

Synopsis Isolated showers this evening will come to an end as a
weak ridge moves across western washington. Rain will spread
inland early Sunday as a front approaches the area. The front will
move across the area late Sunday. Onshore flow and showers will
follow the front Sunday night and Monday. A warm front will brush
the area Tuesday. A rather wet frontal system will reach the area
Wednesday. An upper trough and onshore flow will keep showers in
the forecast Thursday. Dry and mild weather is possible for the
end of the week.

Short term A weak short wave ridge is sitting along the
washington coast this evening. Radars show residual isolated very
light showers in the south interior and near oak harbor on whidbey
island this evening. These should dissipate by 11 pm as the
ridging moves into the area.

Infrared satellite imagery shows a frontal system that is
associated with a deep low in the gulf of alaska now sitting along
about 132w longitude. The front itself will move onshore late
Sunday afternoon and sweep inland by early evening. Models are
consistent in showing the rain shield ahead of the front moving
onto the coast about 12z and into the interior shortly after 15z.

Sky and pop grids are consistent with the latest model blend. With
the clouds and precipitation around the area on Sunday, expect
temperatures to struggle to get much higher than 50 degrees in
most places. Another raw march day for the area! Snow amounts
around paradise ranger station in mt rainier national park could
be in the advisory category Saturday afternoon and evening. Will
let the next shift issue the advisory after looking at the
incoming suite of 00z models.

Showers will accompany a trough of low pressure Sunday night into
early Monday. Showers will taper off on Monday and become
confined to the west slopes of the mountains and possibly a
convergence zone as onshore flow gradually decreases late in the
day. With the more showery precipitation and some breaks in the
clouds during the afternoon hours, temperatures will be a few
degrees warmer on Monday than on Sunday.

A warm front will brush the area on Tuesday bringing rain to
mainly the olympic peninsula. The northern 2/3 of the interior may
see some rain as well, but amounts in the interior will be quite
light as most energy with the warm front lifts into vancouver
island. Tuesday high temperatures will mainly be in the lower to
mid 50s again.

The current short term forecast is in good shape. No update is
needed. Albrecht

Long term From the previous long term discussion: a frontal
system will move slowly through the area Tuesday and Wednesday.

Tuesday does not look too wet--it is just a brush by warm front
and most of the rain GOES into british columbia during the day.

That front sags south into western washington Tuesday evening, and
the rain picks up, and then a surge of heavier rain should arrive
later Tuesday night through Wednesday. The front moves inland
Wednesday night, and then a cool upper trough will move through
the region Thursday with a good chance of the pscz setting up.

Friday looks like it has a good chance to be a dry day under high
pressure, and that might extend into next Saturday as well.

Aviation Weak high pres aloft will prevail over the region
overnight. W flow aloft will become SW overnight. The low level flow
will be light offshore or ely. ExpectVFR conditions overnight.

Ksea...VFR conditions thru Sunday morning. Winds will become light
ely overnight.

Falling pressure over the offshore waters, ahead of a frontal
system, along with higher pressure inland will result in easterly
flow overnight. Expect the occluded front, currently well offshore,
to move on the wa coast late Sunday for onshore flow. The next
frontal system is anticipated on Tuesday, followed by another one
Wednesday night.

Hydrology River flooding is not expected for the next 7 days
with the exception of possibly the flood prone skokomish river in
mason county, where heavier rain in the olympics Tuesday night
and Wednesday could be enough to get the river above flood stage.

Sew watches/warnings/advisories
Wa... None.

Pz... Gale warnings are in effect for much of the coastal waters.

Small craft advisories are in effect for the remaining
waters except the puget sound/hood canal.

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 33 mi44 min 45°F1017.6 hPa
TCNW1 - 9446484 - Tacoma, WA 54 mi50 min 48°F 44°F1018 hPa
TCMW1 - 9446482 - Tacoma Met, WA 54 mi44 min SSE 1.9 G 4.1

Wind History for Longview, WA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chehalis-Centralia Airport, WA22 mi37 minN 010.00 miOvercast46°F41°F82%1017.3 hPa

Wind History from CLS (wind in knots)
Last 24hrS8S7S6S7CalmCalmS3S4S4CalmS4SW4SW4S53SW4
1 day agoS6
2 days agoS7S6SW4S6SW5CalmS4S5S5S5S4S10

Tide / Current Tables for Longview, Washington - IGNORE HEIGHTS
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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

Sun -- 03:38 AM PDT     8.06 feet High Tide
Sun -- 06:32 AM PDT     Moonrise
Sun -- 07:02 AM PDT     Sunrise
Sun -- 11:25 AM PDT     1.54 feet Low Tide
Sun -- 03:32 PM PDT     8.48 feet High Tide
Sun -- 06:07 PM PDT     Moonset
Sun -- 07:32 PM PDT     Sunset
Sun -- 11:49 PM PDT     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Longview, Columbia River, Washington
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Click for Map
Sun -- 03:22 AM PDT     3.29 feet High Tide
Sun -- 06:32 AM PDT     Moonrise
Sun -- 07:02 AM PDT     Sunrise
Sun -- 10:30 AM PDT     -0.02 feet Low Tide
Sun -- 03:10 PM PDT     3.60 feet High Tide
Sun -- 06:07 PM PDT     Moonset
Sun -- 07:33 PM PDT     Sunset
Sun -- 11:06 PM PDT     -0.61 feet Low 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 Seattle, WA (1,6,7,8)
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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.