Monday, March27, 2017 L-36.com


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 6:56AMSunset 7:36PM Monday March 27, 2017 3:41 AM PDT (10:41 UTC) Moonrise 6:03AMMoonset 6:19PM 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- 250 Am Pdt Mon Mar 27 2017
.small craft advisory for rough columbia river bar in effect until 7 am pdt this morning...
.small craft advisory for rough columbia river bar in effect from this afternoon through this evening...
In the main channel..Combined seas 7 to 9 feet through this evening. However...seas will temporarily build to near 10 ft with breakers during the ebb around 5 am this morning...and to near 12 ft with breakers during the strong ebb around 515 pm this afternoon.
PZZ200 250 Am Pdt Mon Mar 27 2017
Synopsis for southern washington and northern oregon coast.. A weak surface trough will move through the waters this morning. Another frontal storm system will drop southeastward into the waters Tuesday. A developing low pressure will likely result in the front stalling and strengthening Tuesday night and early Wednesday across our waters. High pres builds over the ne pac Thu and Fri...potentially remaining through the weekend.

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 270420
afdsew
area forecast discussion
national weather service seattle wa
920 pm pdt Sun mar 26 2017

Synopsis The front that brought rain to the area today has
moved into the cascades and is weakening. An upper level trough
behind the front will give showers to the area through Monday
night. A warm front will move through the area on Tuesday giving
rain, mainly to the olympic peninsula. A stronger front associated
with a vigorous low pressure system will give rain and windy
conditions to the area Tuesday night and Wednesday. A trough will
likely give showers to the area on Thursday. Dry weather is
expected on Friday.

Short term The frontal system that gave a wet and cool day to
the region today is now moving into the cascades. Precipitation
has become more showery behind the front. Satellite imagery shows
an upper level trough extending from a low in the central portion
of the gulf of alaska south-southeast into the southern oregon
offshore waters this evening. This trough will push slowly
eastward across the area through Monday night. Enhanced clouds
within the trough at 46-48n 130w promises to bring some
enhancement to the shower activity on Monday.

It really does not appear that there will be much of a break
between Monday's showery trough and the warm front that will
brush the olympic peninsula on Tuesday. Moderate precipitation
will most likely be focused on the northwestern olympic peninsula
and into vancouver island with this warm frontal feature
(consistent with previous model solutions and the going forecast).

Another wave will move into the area from the wsw Tuesday night
into Wednesday. Models are consistent in showing heavier rain with
this front and windy conditions across much of the area on
Wednesday.

A update was issued this evening to refine pops and forecast
wording through Tuesday. Changes were rather minor though.

Albrecht

Long term From the previous long term discussion: the push of
onshore blustery weather behind the system on Wednesday will
settle down Wednesday night and Thursday. An upper trough moves
inland and surface high pressure builds across the region. An
upper ridge will be in place Friday for a dry day with some
sunshine. Clouds will likely increase Friday night with a chance
of rain by Saturday as a warm front pushes into the ridge.

Aviation An upper level trof offshore will move over WRN wa
overnight. Strong SW flow aloft will weaken. The low level flow will
remain light sly. Expect wdsprd MVFR CIGS overnight with areas of
MVFR vsbys (mainly with precipitation).

Ksea... Expect MVFR CIGS thru Monday morning.VFR conditions are
anticipated Monday afternoon but there will probably be occasional
MVFR CIGS with heavier showers. Winds will be sly 5-10 knots,
picking up slightly Monday afternoon.

Marine High pres will prevail overnight for light southerly
flow. A trough will move across the area on Monday for continued
southerly flow. The flow will back to southeast Monday night in
response to falling pressure over the offshore waters ahead of a
weak cold front. This front will move across the area on Tuesday.

A strong frontal system will impact the region on Wednesday.

Hydrology A wet frontal system will give rain to the area later
Tuesday through Wednesday. While precipitation amounts will only
be moderate, soils are quite saturated and there will be a good
deal of runoff. Most rivers will see rises, and a few could
approach bankfull.

The normally flood-prone skokomish river increasingly appears that
it will go over flood stage early Wednesday and may see moderate
flooding. A hydrologic outlook was issued for the skokomish river
in mason county as a result and the forecast hydrograph was
updated. Albrecht

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

Pz... Small craft advisories for hazardous seas are in effect for the
coastal waters.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 33 mi41 min 45°F1013.7 hPa (+1.1)
TCNW1 - 9446484 - Tacoma, WA 54 mi41 min 45°F 44°F1012.7 hPa (+1.2)
TCMW1 - 9446482 - Tacoma Met, WA 54 mi41 min SE 4.1 G 6

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chehalis-Centralia Airport, WA22 mi46 minVar 510.00 miOvercast46°F44°F93%1012.5 hPa

Wind History from CLS (wind in knots)
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Last 24hrS4CalmS4S4S6S8S10S7S6S8S9S9S10
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1 day agoCalmS3S4S4CalmS4SW4SW4S53SW4
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2 days agoCalmS44S4S5S7
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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

Mon -- 04:14 AM PDT     8.49 feet High Tide
Mon -- 07:00 AM PDT     Sunrise
Mon -- 07:04 AM PDT     Moonrise
Mon -- 12:10 PM PDT     0.90 feet Low Tide
Mon -- 04:21 PM PDT     8.66 feet High Tide
Mon -- 07:20 PM PDT     Moonset
Mon -- 07:34 PM PDT     Sunset
Mon -- 07:59 PM PDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.21.64.378.48.37.56.24.83.42.21.30.91.64.16.98.58.57.76.44.93.31.90.9

Tide / Current Tables for Longview, Columbia River, Washington
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Longview
Click for Map
Mon -- 03:55 AM PDT     3.76 feet High Tide
Mon -- 07:00 AM PDT     Sunrise
Mon -- 07:04 AM PDT     Moonrise
Mon -- 11:24 AM PDT     -0.19 feet Low Tide
Mon -- 04:00 PM PDT     3.80 feet High Tide
Mon -- 07:20 PM PDT     Moonset
Mon -- 07:34 PM PDT     Sunset
Mon -- 07:59 PM PDT     New Moon
Mon -- 11:43 PM PDT     -0.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.30.92.33.43.83.42.72.11.610.4-0.1-00.92.23.43.83.42.61.81.30.80.2-0.3

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 (6,6,7,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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.