Wednesday, April26, 2017 L-36.com


Marine Weather and Tides
Kalama, 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 6:02AMSunset 8:16PM Wednesday April 26, 2017 5:02 AM PDT (12:02 UTC) Moonrise 5:39AMMoonset 7:41PM Illumination 0% Phase: New Moon; Moon at 0 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- 232 Am Pdt Wed Apr 26 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 5 to 7 ft through Wednesday. However...seas temporarily building to 9 ft with breakers likely during the very strong ebb around 515 am...and to 10 ft with breakers possible during the ebb around 545 pm Wednesday afternoon.
PZZ200 232 Am Pdt Wed Apr 26 2017
Synopsis for southern washington and northern oregon coast.. A weak front will cross the waters today. High pressure over the northeast pacific will build toward the coast Thu and remain near the coast over the weekend.

7 Day Forecast for Marine Location Near Kalama, WA
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location: 46, -122.85     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 260950 rra
afdpqr
area forecast discussion
national weather service portland or
249 am pdt Wed apr 26 2017

Synopsis Another wet day, with snow in the cascades. Rain will
transition to showers later today. But, showery weather will continue
through thu. Does appear will have a break for later Fri and sat,
with dry and mild conditions. But, will see threat of rain return
later Sat night and sun. With all these april showers, just imagine
the size of those coming mayflowers.

Short term (today through fri)... Rather active and moist jet lies
offshore, and continues to aim itself right over the pac NW today
into tonight. Next boundary will push onshore around mid-morning,
with rain quickly transitioning to showers. Will maintain this trend,
with decreasing showers from west to east across the region this
afternoon. Showers will persist well into this evening in the
cascades, thanks to favorable orographic flow.

Now, there is a developing wave on the trailing part of the front,
but now appears that this will push inland over southwestern oregon.

Models agree for the most part, as heaviest rain associated with this
wave mainly focused from coast range of west central oregon extending
into parts of southwest oregon. Precipitable water values support
decent shot of rainfall this am in those areas, with 0.50 to 0.75
inch not out of the question. But, heaviest precipitation may wind up
falling over the cascades from santiam pass southward to near crater
lake. If so, this could be quite a good accumulation of snowfall for
today into early this evening. Current winter weather advisory for
snow above 4500 feet in the cascades looks reasonable, with 6 to 12
inches likely. As usual, heaviest snow would be on higher
peaks/ridges, mainly above 5000 feet. Will extend advisory out to 7
pm today, as showers will persist into early evening.

Showers will gradually decreasing tonight. But not expecting much
change in overall air mass on thu. A few passing embedded
disturbances in the westerly flow on Thu will be enough to
destabilize air mass bit more, with showers increasing again later
thu am into the afternoon. Snow levels remain between 3500 and 4500
feet, but with less precipitation amounts will result in only a few
inches of new snow. Showers will gradually decrease Thu night.

Now, after all the rain, we will need a break. Indeed, it appears
that break arrives on fri. Still a minor threat of showers, but think
even that threat will be over the cascades. Otherwise, will trend to
partly sunny skies with mild temperatures. Rockey.

Long term Friday night through Tuesday... Showers continue to
further diminish later Friday through Saturday as an upper level
ridge over the eastern pacific will further amplify in between low
pressure systems both upstream and downstream. Not quite confident
enough yet to bring sky cover to mostly sunny wording, but did trend
things that direction. Meanwhile, temperatures will also respond
accordingly with high temperatures in the afternoon warming into the
mid 60s - all the way to around seasonal normals, at least for one
day! However, this will be yet another only short-lived intermission
in the season of steady rain. A weakening frontal system will bring
increasing round of clouds, another chance of rain, and slightly
cooler temperatures. Forecast models do diverge a bit the first half
of next week, but as we transition to may there is some potential
for a bit of shift in the pattern. At this point, trended the
forecast dry for Monday and Tuesday, but did so somewhat cautiously
for two reasons - first, ensemble members continue to suggest a
somewhat large spread in possible solutions; second, we've seen this
sort of pattern in the models several times in recent weeks, where a
seeming trend toward dry conditions and a building ridge fails to
appear. That said, this would be consistent with the latest CPC 6-10
outlook of warmer and drier than average may 1-5 period. An abundance
of words to say the forecast was trended this direction but with
lower than typical confidence. cullen

Hydrology The lower columbia river will be running above bankfull
for the next several days. Primary areas of concern are the columbia
near vancouver and downstream past the columbia near longview to the
mouth. Contributions to the high flow are coming from high
astronomical tides in addition to increased runoff from the snake
river and willamette river basins. Lower reaches of tributaries
flowing into the columbia river may also experience periods of
elevated water during the high tide cycles. Please continue to
monitor the forecasts for the next several days. /jbonk

Aviation Moist onshore flow continues today. An upper level
shortwave will move across the area this morning, providing
broad lift over the area. Rain will increase this morning and
taper off later this afternoon. MVFR conditions are likely at the
coast. Local ifr CIGS and vis are possible through the
afternoon. Inland areas starting off withVFR and local MVFR
cigs, but as rain increases with incoming system MVFR conditions
should become more widespread. Rain tapers off mid to late in the
afternoon with cooler air aloft arriving. This should help
improve conditions to predominantlyVFR. Model output info: 00z
mos guidance seem to have caught up on ifr conditions from tue
evening and continue with low MVFR to ifr conditions inland this
morning and afternoon following by improving conditions. This
seems overdone giving the occluded front yesterday was stronger
than what models are suggesting for today.

Kpdx and approaches...VFR early with local MVFR in the area.

Should see MVFR conditions increase after 15z or so and continue
through about 21z with improving conditions following. /mh

Marine Wind slowly settling down and are mostly below advisory
criteria. There are a few spots gusting in the 20-25 knot range.

Winds will continue in the 15 to 20 knot range this morning and
slowly decrease in the afternoon. Seas running 7 ft with short
period which will create some rough conditions, this should abate
early this morning.

Broader high pressure builds over the NE pac keeping a relative
lull in winds through Friday. Seas may next reach 10-11 ft
Thursday through early Friday as the southern end of a swell
train clips the northern waters from a surface low crossing the
alaskan panhandle. /mh tw

Pqr watches/warnings/advisories
Or... Winter weather advisory until 7 pm today for cascades in
lane county and northern oregon cascades.

Wa... None.

Pz... Small craft advisory for hazardous seas until 5 am pdt early
this morning for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for rough columbia river bar until 7 am
pdt this morning.

Small craft advisory for rough columbia river bar from 4 pm
this afternoon to 8 pm pdt this evening.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 9 mi50 min 49°F1011.5 hPa
ASTO3 - 9439040 - Astoria, OR 51 mi50 min SW 8.9 G 12 49°F 51°F1010.8 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 64 mi50 min 52°F1012.9 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kelso, Kelso-Longview Airport, WA9 mi66 minSE 310.00 miOvercast50°F50°F100%1012.2 hPa
Scappoose, Scappoose Industrial Airpark, OR16 mi69 minS 310.00 miMostly Cloudy48°F46°F96%1011.5 hPa

Wind History from KLS (wind in knots)
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Last 24hrSE4SE4SE5SE6S6S6S5S7S9
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1 day agoE8SE55CalmN4N3N4--N7N7N9N6NW3Calm3CalmCalmCalmCalmSE5SE4CalmCalmSE6
2 days agoCalmSE3S4SE8S7S9S6S9
G15
S6W6Calm4CalmCalmSE3CalmCalmCalmSE5SE5SE6SE4SE7SE4

Tide / Current Tables for Kalama, Washington - IGNORE HEIGHTS
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Kalama
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

Wed -- 12:34 AM PDT     0.90 feet Low Tide
Wed -- 04:36 AM PDT     9.34 feet High Tide
Wed -- 05:18 AM PDT     New Moon
Wed -- 06:05 AM PDT     Sunrise
Wed -- 06:39 AM PDT     Moonrise
Wed -- 01:16 PM PDT     -0.69 feet Low Tide
Wed -- 05:26 PM PDT     8.27 feet High Tide
Wed -- 08:13 PM PDT     Sunset
Wed -- 08:40 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.13.36.58.99.38.67.45.742.30.9-0.2-0.7-02.75.988.27.56.453.62.4

Tide / Current Tables for Longview, Columbia River, Washington
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Longview
Click for Map
Wed -- 03:54 AM PDT     4.37 feet High Tide
Wed -- 05:18 AM PDT     New Moon
Wed -- 06:05 AM PDT     Sunrise
Wed -- 06:39 AM PDT     Moonrise
Wed -- 12:03 PM PDT     -0.89 feet Low Tide
Wed -- 04:33 PM PDT     3.39 feet High Tide
Wed -- 08:13 PM PDT     Sunset
Wed -- 08:40 PM PDT     Moonset
Wed -- 11:45 PM PDT     -0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-01.12.744.43.82.821.510.3-0.4-0.9-0.50.82.33.23.32.61.81.20.80.3-0.1

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 Portland, OR (8,2,3,4)
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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.