Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Chinook, 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 6:53AMSunset 7:44PM Thursday March 30, 2017 9:40 AM PDT (16:40 UTC) Moonrise 7:50AMMoonset 10:09PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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- 858 Am Pdt Thu Mar 30 2017
.small craft advisory for rough columbia river bar in effect from 4 pm this afternoon to 8 pm pdt this evening...
In the main channel..Combined seas 9 ft this morning subsiding to 7 ft by tonight. However...seas will temporarily build to 10 ft with breakers possible during the ebb around 730 pm this evening...and to 11 ft with breakers possible during the very strong ebb around 745 am Fri morning.
PZZ200 858 Am Pdt Thu Mar 30 2017
Synopsis for southern washington and northern oregon coast.. A ridge of high pres will build over the waters tonight and remain through Fri. A weak front will move across the waters Sat morning. High pres builds in from the W Sat afternoon through Sun.

7 Day Forecast for Marine Location Near Chinook, WA
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location: 46.27, -123.95     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 301035
afdpqr
area forecast discussion
national weather service portland or
335 am pdt Thu mar 30 2017

Synopsis Showers will decrease today as an upper level
trough of low pressure moves east of the region. Friday will be dry
across the region as high pressure crosses overhead. Another weak
system crosses Saturday with rain returning for most areas. Many
areas may be largely dry Sunday through Tuesday as another upper
ridge tries to build over the pacnw.

Short term Today through Saturday night... Showers are picking up
again after a brief lull earlier. The primary cold front has shifted
southeast of the CWA but the upper trough axis is making its
approach and is bringing additional lift and instability to enhance
the north-northwest aligned orographic flow. Showers do gradually
decrease behind the trough axis today, but will be slower to do so
than is typical. A fairly high amplitude upper ridge is closely
following today's exiting trough and will be bringing northerly flow
aloft, however, the right entrance region of the accelerating upper
jet will induce extra lift and keep prolonged showers continuing
mainly over the cascades well into the evening and early overnight.

Away from the mountains, skies should clear enough to bring some
patchy fog across most of the lowlands and coast range valleys.

Friday will be a rather pleasant spring day once the fog clears.

The ridge builds Friday night but gets pushed over by deepening low
pressure over the gulf of alaska on Saturday. Most of the rain will
be pushed north of our cwa, but there will be enough energy to bring
rain threat. Best chances will be north and west of salem and
amounts will stay relatively light given the current course of the
last several months.

Temperatures and snow levels will stay somewhat close to seasonal
normals with light accumulations above 3500 feet through tonight,
however snow levels will rise well above the passes Saturday. /jbonk

Long term Sunday through Thursday... Models are in fairly
good agreement through about Monday with a weak upper trough moving
through the area for a continued low chance of showers although it
might be fairer to say most areas will likely be on the drier side
versus wetter. 00z models are now keeping Tuesday under a passing
dry upper ridge but have left pops intact for the time being until
better run to run consistency develops. They also now have a warm
front clipping the region on Wednesday but are showing little rain
interest and keeping the threat mainly north. The GFS and the ecmwf
are in good large scale agreement having the golf low deepen
offshore Wednesday night and Thursday. The details still need some
strong ironing though as the GFS brings a cold front across the
region early Thursday while the ec stalls the front just offshore
while an unseasonably aggressive surface and developing compact upper
develops and swings north just west of 130w. Will certainly want to
keep an eye on the ec solution as a 968mb surface low is highly
unusual this late in the season. Fortunately, the current forecast
track keeps it well offshore with only a glancing blow of winds at
the coast Thursday night. /jbonk

Aviation Scattered showers this morning will continue to
bring a mix ofVFR with MVFR conditions through about 16z. Expect
primarilyVFR conditions after 16z this morning as showers decrease,
although there is still a small chance for MVFR CIGS through 18z.

Vfr conditions expected to remain dominant through 09z tonight, then
there is a chance for MVFR or ifr conditions to develop in the
valleys and at the coast with low stratus or fog.

Kpdx and approaches... PrimarilyVFR conditions today and tonight.

There is a chance for MVFR conditions with showers through 16z this
morning. After 09z tonight chances for MVFR or ifr conditions return
with the potential for the development of fog or low clouds.

Marine Nw winds around 10 to 15 kt this morning will continue to
weaken today and tonight as a surface ridge of high pres builds over
the waters. A weak front will move east across the waters sat
morning, but winds are likely to remain under 20 kt with this
system. The next chance for small craft advisory winds comes with
northerly winds over the oregon waters Sat night and sun.

A wnw swell around 10 ft 14 seconds early this morning will subside
a couple of feet today. Seas are expected to remain under 10 ft
until Sat night and Sun when a westerly swell arrives and brings
seas up into the 12 to 14 ft range.

Pqr watches/warnings/advisories
Or... None.

Wa... None.

Pz... Small craft advisory for hazardous seas until 11 am pdt this
morning for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for rough columbia river bar until 9 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
46243 - Clatsop Spit, OR - 162 10 mi41 min 48°F8 ft
ASTO3 - 9439040 - Astoria, OR 11 mi41 min WNW 8 G 13 46°F 46°F1023.4 hPa (+2.4)
TOKW1 - 9440910 - Toke Point, WA 30 mi41 min WNW 11 G 19 47°F 49°F1022.9 hPa (+2.3)
46248 - Astoria Canyon, OR (179) 38 mi41 min 50°F9 ft
46211 - Grays Harbor, WA (036) 44 mi49 min 50°F9 ft
WPTW1 - 9441102 - Westport, WA 45 mi65 min NNW 19 G 26 45°F 49°F1022.4 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 49 mi41 min 50°F1024 hPa (+2.0)

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR8 mi46 minWNW 1610.00 miLight Rain46°F37°F73%1023.2 hPa

Wind History from AST (wind in knots)
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Tide / Current Tables for Chinook, Baker Bay, Washington
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Chinook
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Thu -- 03:03 AM PDT     8.93 feet High Tide
Thu -- 06:58 AM PDT     Sunrise
Thu -- 08:49 AM PDT     Moonrise
Thu -- 09:18 AM PDT     -0.48 feet Low Tide
Thu -- 03:51 PM PDT     7.84 feet High Tide
Thu -- 07:42 PM PDT     Sunset
Thu -- 09:19 PM PDT     1.24 feet Low Tide
Thu -- 11:08 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.27.18.48.98.46.74.42.10.4-0.4-0.20.92.74.76.47.57.87.15.53.62.11.31.42.5

Tide / Current Tables for Columbia River entrance (N. Jetty), Washington
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Columbia River entrance (N. Jetty)
Click for Map
Thu -- 02:49 AM PDT     8.40 feet High Tide
Thu -- 06:59 AM PDT     Sunrise
Thu -- 08:50 AM PDT     Moonrise
Thu -- 09:10 AM PDT     -0.33 feet Low Tide
Thu -- 03:37 PM PDT     7.25 feet High Tide
Thu -- 07:43 PM PDT     Sunset
Thu -- 09:11 PM PDT     1.21 feet Low Tide
Thu -- 11:08 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.378.18.47.65.93.81.80.3-0.3-01.12.94.76.27.17.26.34.83.11.81.21.52.6

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 (12,3,4,5)
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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.