Saturday, February24, 2018 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 6:56AMSunset 5:52PM Saturday February 24, 2018 12:14 AM PST (08:14 UTC) Moonrise 12:08PMMoonset 2:35AM Illumination 66% Phase: Waxing Gibbous; Moon at 9 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- 847 Pm Pst Fri Feb 23 2018
.small craft advisory for rough columbia river bar in effect through Saturday afternoon...
In the main channel..Combined seas 7 ft this evening building to 9 to 11 ft late tonight and 13 or 14 ft on Saturday. However, seas will temporarily build to near 10 ft during the ebb around 1045 pm tonight, and near 15 ft with breakers during the stronger ebb around 1130 am Saturday.
PZZ200 847 Pm Pst Fri Feb 23 2018
Synopsis for southern washington and northern oregon coast.. A surface low will move through the vancouver island area tonight through Sat. The associated front will move S across the waters this afternoon and tonight. Another system will take a similar track later Sat night and Sun. Small craft advisory winds are likely at times through this weekend, with gales likely in the N waters late tonight and Sat morning and again late Sat night and Sun morning. The series of systems this weekend will result in seas building into at least the mid teens.

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 240426
afdsew
area forecast discussion
national weather service seattle wa
826 pm pst Fri feb 23 2018

Synopsis Cold and unsettled weather will continue through next
week. A weather system will move through the area later today and
tonight with lowland snow transitioning to rain. Another system
will cross the area Saturday night and Sunday with local lowland
snow possible again. There will be a bit of a break on Monday
before more systems arrive in the middle of the week.

Short term The low level air mass will continue to moderate
tonight as S SW flow advects warmer air inland. The profiler here
in north seattle shows a spike in the freezing level up to 500
meters with south flow. The coast has changed over to rain but
still seeing a rain snow mix in the interior, especially north and
south sound. Seattle is getting shadowed due to westerly flow off
the olympics. The focus tonight will be on a developing puget
sound convergence zone that will likely form over snohomish county
then shift south into king county early Sat morning. Snow levels
are still low enough that areas near the cascades may see
accumulating snow. Heavy snow is still expected in the cascades
and passes - winter weather advisories remain in effect. 33
previous discussion... There will be a bit of a break later
Saturday in between weather systems. Yet another cold upper short
wave will drop down from the northwest Saturday night and Sunday
morning. There is enough uncertainty with the details that another
shot of lowland snow cannot be ruled out but, at least for now,
snow levels are expected to be high enough to preclude any
impactful lowland snow accumulations.

The mountains will also pick up a quite a bit of snow through
Sunday. High end advisory amounts are expected tonight and
Saturday morning. Another round of heavy snow is possible
Saturday night and Sunday. A winter weather advisory is in effect
for tonight and Saturday morning. A winter storm watch is in
effect for Saturday night and Sunday.

It also looks breezy to windy at times the next couple of days.

Winds are expected to remain below advisory levels.

Monday will be a relative lull in the wet weather but cool north
to northwest flow aloft will continue with weak embedded short
waves. Some rain or snow showers cannot be ruled out but
significant lowland accumulations are not expected. Schneider

Long term Cool and unsettled weather will continue Tuesday
through Friday. Additional upper troughs will move through the
area but models are not in good agreement with the details. The
general idea is for continued showery weather at times with low
snow levels and below normal high temperatures. Low level onshore
flow will continue but the air will be cold enough for the threat
of lowland snow at times. Schneider

Aviation A cool upper level trough will maintain rain snow
showers across western washington tonight. The air mass is moist
with W NW flow aloft. MVFR to ifr ceilings are expected through
Saturday morning. Heavier showers from a puget sound convergence
zone is expected over snohomish king counties from 12-18z. 33
ksea... A mix of rain snow showers tonight with accumulations under
1 inch. Temperatures will remain above freezing. S SW flow 10-15
kt. MVFR to ifr CIGS through Sat morning. 33

Marine Strong westerly flow will develop tonight behind a
front with gales likely through the strait of juan de fuca. Expect
small craft advisory winds elsewhere. A stronger system will
impact the region Saturday night and Sunday with gales possible
again - gale watches are in effect. Seas will also build to 14 to
20 feet during this period. Weak high pressure will bring lighter
winds on Monday. Another cold front will arrive on Tuesday. 33

Hydrology River flooding is not expected for the next 7 days.

Sew watches warnings advisories
Wa... Winter weather advisory until noon pst Saturday for cascades of
pierce and lewis counties-cascades of snohomish and king
counties-cascades of whatcom and skagit counties.

Winter storm watch from Saturday evening through Sunday
afternoon for cascades of pierce and lewis counties-
cascades of snohomish and king counties-cascades of whatcom
and skagit counties.

Winter weather advisory until 8 pm pst this evening for san juan
county-western skagit county-western whatcom county.

Winter weather advisory until 4 am pst Saturday for east puget
sound lowlands.

Pz... Small craft advisory for rough bar until 6 am pst Sunday for
grays harbor bar.

Gale watch from late Saturday night through Sunday morning for
coastal waters from CAPE flattery to james island 10 to 60
nm-coastal waters from CAPE flattery to james island out 10
nm-coastal waters from james island to point grenville 10
to 60 nm-coastal waters from james island to point
grenville out 10 nm-coastal waters from point grenville to
cape shoalwater 10 to 60 nm-coastal waters from point
grenville to CAPE shoalwater out 10 nm-west entrance u.S.

Waters strait of juan de fuca.

Small craft advisory until midnight pst Saturday night for
coastal waters from CAPE flattery to james island 10 to 60
nm-coastal waters from CAPE flattery to james island out 10
nm-coastal waters from james island to point grenville 10
to 60 nm-coastal waters from james island to point
grenville out 10 nm-coastal waters from point grenville to
cape shoalwater 10 to 60 nm-coastal waters from point
grenville to CAPE shoalwater out 10 nm-west entrance u.S.

Waters strait of juan de fuca.

Gale watch from late Saturday night through Sunday afternoon for
central u.S. Waters strait of juan de fuca-east entrance
u.S. Waters strait of juan de fuca.

Small craft advisory from 7 am to 6 pm pst Saturday for central
u.S. Waters strait of juan de fuca-east entrance u.S.

Waters strait of juan de fuca.

Gale warning until 7 am pst Saturday for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisory until 6 am pst Saturday for northern inland
waters including the san juan islands.

Small craft advisory until 7 am pst Saturday for admiralty inlet.

Small craft advisory until 4 am pst Saturday for puget sound and
hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 33 mi45 min 40°F1021.1 hPa
TCNW1 - 9446484 - Tacoma, WA 54 mi45 min 38°F 47°F1018.8 hPa
TCMW1 - 9446482 - Tacoma Met, WA 54 mi45 min S 4.1 G 9.9

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chehalis-Centralia Airport, WA22 mi20 minSSW 7 G 129.00 miOvercast36°F33°F93%1020 hPa

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Last 24hrCalmSW3SW5S3CalmSW4SW5SW4S7S10S10S10S13--S13S13
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1 day agoS5CalmN6N6N7N10NE12N10
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS6S75S4S7S7S9S9S7S8S9S8S7

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 -- 02:35 AM PST     Moonset
Sat -- 05:20 AM PST     3.14 feet Low Tide
Sat -- 06:59 AM PST     Sunrise
Sat -- 09:47 AM PST     8.66 feet High Tide
Sat -- 12:10 PM PST     Moonrise
Sat -- 05:51 PM PST     Sunset
Sat -- 07:03 PM PST     0.81 feet Low Tide
Sat -- 11:46 PM PST     6.48 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.95.24.53.93.43.23.44.86.88.38.78.37.56.353.72.51.610.81.42.94.76.1

Tide / Current Tables for Longview, Columbia River, Washington
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Longview
Click for Map
Sat -- 02:35 AM PST     Moonset
Sat -- 03:45 AM PST     0.88 feet Low Tide
Sat -- 06:59 AM PST     Sunrise
Sat -- 09:34 AM PST     4.60 feet High Tide
Sat -- 12:10 PM PST     Moonrise
Sat -- 05:51 PM PST     Sunset
Sat -- 06:41 PM PST     0.18 feet Low Tide
Sat -- 11:18 PM PST     2.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.21.71.310.91.11.72.73.84.54.543.12.421.71.30.80.30.20.71.62.42.9

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 (3,6,7,8)
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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.