Monday, January21, 2019 L-36.com


Marine Weather and Tides
Onalaska, WA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:45AMSunset 5:00PM Monday January 21, 2019 10:03 AM PST (18:03 UTC) Moonrise 5:53PMMoonset 8:15AM Illumination 99% Phase: Full Moon; Moon at 16 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- 249 Am Pst Mon Jan 21 2019
.small craft advisory for rough columbia river bar in effect from this afternoon through this evening...
In the main channel.. - general seas...seas around 6 to 7 feet through Tuesday morning. - first ebb...around 445 am Monday. Seas building to 9 feet. - second ebb...very strong ebb around 5 pm Monday. Seas building to 10 feet with breakers likely. - third ebb...around 530 am Tuesday. Seas building to 8 feet.
PZZ200 249 Am Pst Mon Jan 21 2019
Synopsis for the southern washington and northern oregon coast.. High pressure will build over the waters today. The next frontal system will move across the waters Monday night and Tuesday. High pressure returns during the latter half of the 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 211654
afdsew
area forecast discussion
national weather service seattle wa
855 am pst Mon jan 21 2019

Synopsis Weak high pressure will produce a break in
precipitation today into tonight. A pair of frontal systems will
give rain at times Tuesday into Wednesday. A ridge of high pressure
aloft will bring about another period of dry weather Thursday into
early next week.

Short term Plenty of low clouds over much of W wa this morning
with temperatures starting off a little brisk with many locations
reporting temps in the lower to mid 30s... Although seatac is proving
to be the local hot spot currently observing 40 degrees. Some
isolated showers are present on the radar... But are generally light
and look to be pretty short lived.

A weakening upper level ridge will keep conditions quiet over W wa
again today. Low clouds and fog were slow to burn off
yesterday... But with some breaks in the cloud cover already starting
to occur... Thanks to a look out the window... Am hopeful that lower
clouds will give way to mid level or high clouds in advance of
upcoming system for Tuesday.

Speaking of which... Looking at next system making its way to the
coast early Tuesday morning bringing the usual mix of wind and rain
to the area. Winds will be breezy to locally windy for the
area... However speeds do not look to encroach on headline worthy
thresholds at this time. This initial system has a hard time staying
together as it moves eastward and as such precip amounts look to be
initially light. A secondary system looks a bit wetter though as it
follows right on the heels of the first one... Impacting the area
Tuesday afternoon and evening. This will allow for the breezy windy
conditions to persist into Wednesday... But will also result in
rising snow levels. This system does not look to linger very
long... Being east of the cascades just after sunset Wednesday.

Models remain on track for upper level ridging to start building into
the area overnight Wednesday and into Thursday.

Inherited forecast looks good with no need for any morning updates.

Smr

Long term From previous discussion... Models remain in good
agreement with an upper ridge building into the region Thursday
through Saturday for another dry period along with near or slightly
above normal daytime temperatures. By late in the weekend, both the
gfs and the euro retrograde the ridge axis offshore. The euro is
more aggressive with this idea and allows a weak system to clip the
area from the northwest on Sunday. This is a relatively new idea in
the models and, as such, no significant changes were made to the
extended forecast overnight. 27

Aviation An upper ridge over the area today will weaken tonight
as a frontal system moves into the area. At the surface, weak high
pressure over the area today will shift inland tonight with
increasing southeasterly gradients as the frontal system nears. The
air mass is stable.

Ceilings mostly 4000-6000 feet this morning but with pockets of MVFR
ceilings and isolated ifr ceilings and fog, mainly over the south
interior. The general trend should be for improving conditions today
as the low levels dry a bit. Low and mid clouds will increase again
tonight and Tuesday morning as rain develops.

Ksea... Ceilings 4000-5000 feet this morning. Ceilings could lower at
times this morning but the general trend should be for improving
conditions by afternoon. Ceilings will lower again tonight and
Tuesday morning as a front moves onshore and rain develops.

Southerly wind 3-6 knots. Schneider

Marine Winds will be fairly light today with high pressure over
the area. A frontal system will move into the area tonight and
Tuesday and then inland Tuesday night and Wednesday. Southerly small
craft advisory winds are likely most waters during this period.

Marginal gales are possible at times coastal waters, entrances to
the strait, and northern inland waters. Will look at this closer
after the 12z guidance comes in this morning.

Winds will be relatively light again Thursday and Friday with weak
high pressure over the area.

Minor tidal overflow is possible at the coast early this afternoon
and again early Tuesday afternoon due to high astronomical tides and
slight pressure anomalies. The better chance looks like it will be
on Tuesday when atmospheric pressures are a little lower and
resultant anomalies are a bit larger. A similar round of minor tidal
overflow is possible for the inland waters late Wednesday morning.

Schneider

Hydrology From previous discussion... The idea that a couple of
weak fronts would just brush the area Tuesday and Wednesday is
trending toward wetter solutions. Considering how easily the
skokomish river made it up to flood stage with this past front, i
think now that the river forecast bears watching for the middle of
the week. For now, I just have the river starting upward again on
Tuesday and do not have a forecast for Wednesday--but that's the day
to watch of the models keep up this trend. Elsewhere, river flooding
is not expected over the next 7 days.

Sew watches warnings advisories
Wa... Coastal flood advisory until 3 pm pst this afternoon for central
coast.

Coastal flood advisory from noon to 4 pm pst Tuesday for central
coast.

Pz... Small craft advisory from 8 pm this evening to 10 am pst
Wednesday 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.

Small craft advisory from midnight tonight to 7 am pst Wednesday
for admiralty inlet-east entrance u.S. Waters strait of
juan de fuca-northern inland waters including the san juan
islands-puget sound and hood canal-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 mi33 min 43°F1025.8 hPa
TCMW1 - 9446482 - Tacoma Met, WA 54 mi33 min SSE 1.9 G 5.1
TCNW1 - 9446484 - Tacoma, WA 54 mi33 min 40°F 50°F1026 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chehalis-Centralia Airport, WA22 mi68 minVar 37.00 miOvercast37°F37°F100%1024.4 hPa

Wind History from CLS (wind in knots)
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Last 24hrN6CalmCalmCalmCalmN4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS5S5S4SW4SW4CalmSW5
1 day agoCalmSW5CalmCalmCalmCalmCalmN4E4CalmCalmCalmCalmCalmCalmCalmCalmCalmN6CalmN4
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2 days ago4S4S6S5SW6S4S6S3NE3CalmS7
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SW3S3CalmCalmCalmCalmSW4SW4

Tide / Current Tables for Longview, Washington - IGNORE HEIGHTS
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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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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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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 (13,3,4,5)
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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.