Saturday, November18, 2017 L-36.com


Marine Weather and Tides
Chinook, 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 7:23AMSunset 4:38PM Saturday November 18, 2017 12:27 AM PST (08:27 UTC) Moonrise 7:18AMMoonset 5:21PM 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- 902 Pm Pst Fri Nov 17 2017
In the main channel..Combined seas around 4 ft through tonight, then dropping to around 3 ft Saturday. However, seas will temporarily build to near 7 ft during the ebb around 415 am Saturday morning, and near 7 ft with breakers possible during the strong ebb around 430 pm Saturday afternoon.
PZZ200 902 Pm Pst Fri Nov 17 2017
Synopsis for southern washington and northern oregon coast.. Weak high pressure holds over the waters through Saturday. A strong front will move across the waters Sunday through Monday morning. Another front is expected for Tuesday.

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 180523
afdpqr
area forecast discussion
national weather service portland or
922 pm pst Fri nov 17 2017

Synopsis Showers diminish tonight as a ridge of high pres builds
overhead. The ridge brings dry weather for most of the region
Saturday through early Sunday morning. A cold front crosses mainly
Sunday mid-day through mid-day Monday. Expect gusty winds, moderate
rain, and moderate cascade snow, mainly above the passes. Next week
looks to be wet overall with rainy weather affecting at least the
first part of holiday weekend travel. Snow levels during this time
appear to remain rather high with limited impacts across the
cascade and coast range passes.

Short term Tonight through Monday... No changes. Previous
discussion follows... Showers are beginning to
taper off today from south to north as a short period of high
pressure builds north for the next 48 hours, or so.

Showers should completely dissipate tonight leaving the entire cwa
will dry tomorrow with the far northwest corner of the area being
the last to dry out around daybreak. The clearing skies both tonight
and for many areas Sunday will result in patchy to areas of fog
developing in the valleys.

On Sunday the progressive pattern continues with a quasi-short wave
trough dropping south from the gulf of alaska. The digging trough
will tap into a longer fetch of moisture stretching south toward
hawaii. This brings a warm and moist air mass in ahead of the cold
front Sunday afternoon through early Monday. Fortunately, the trough
and associated front do keep enough southerly motion such that a
threat of numerous hours of rain or snow will be limited. Snow
levels will change from 6-7,000 feet when the bulk of the precip
occurs, to about 3-5,000 feet with and behind the front when the
moisture stream is greatly diminished. The front will have largely
exited the area by Monday afternoon, but may hang on to the lane
cascades until the very late afternoon. Additionally, winds ahead
of the front will be breezy for many willamette valley areas and
windy at the coast. Strongest gusts at the coast appear to be 45-50
mph.

Long term Monday night through Friday. Overall confidence has
improved in the forecast for next week today with better model
agreement. Weak shortwave ridging may provide a very brief dry
period later Monday, but the next frontal system will then quickly
approach by Tuesday. This disturbance will bring another round of
steadier rain across the region Tuesday and Wednesday, so expect wet
conditions for any pre-holiday travel. For the thanksgiving holiday,
some chance of rain will continue across the area, but expect
temperatures to be several degrees above seasonal normals, with
afternoon highs in the mid 50s, with perhaps upper 50s at a few
spots. However, snow levels look to remain well above the cascade
passes during the time. Another short-lived break from the rain is
likely on Friday, but the next system quickly arrives by next
weekend. Cullen

Aviation Showers are rapidly decreasing this evening as
cooling surface temps and building weak high pres aloft bring an
increasingly stable air mass. Current surface obs show widespread
vfr conditions, and expect this to continue for the next several
hrs. However, dewpoint depressions are only a few degrees at most
locations. Think that we will see some scattering of the 5-6 kft
deck over the region overnight, which will likely result in areas
of patchy fog and low stratus. The best chances will be at the
more fog prone locations, such as khio and keug. And fog and low
clouds that form should dissipate by late Sat morning, withVFR
conditions expected through the remainder of the day.

Kpdx and approaches... There could be a stray shower between now
and midnight, but expectVFR to continue. There may be some cloud
breaks developing overnight. This would lead to some potential
for ifr clouds or fog to form near the terminal later tonight
into early Sat morning, but confidence is not high at this time.

Pyle

Marine Conditions will remain rather benign tonight and much
of Saturday. Weak high pres over the waters will keep SW winds
less than 20 kt. Seas will be around 5 ft during this time.

However, a significant frontal system is expected to arrive sat
night and sun. This system looks like it will be a period of
high-end gale force southerly winds, with some models suggesting
potential for some storm force gusts. A gale watch is in effect,
and we may need to consider whether we need a storm watch if the
models trend any stronger. Seas with this system will rise
rapidly Sat night, peaking on Sun at around 20 ft. A low moving
along the front will slow its progress and the strong winds and
seas may remain across the waters south of cascade head into
Monday morning. Another front is expected Tuesday with another
chance for gales. Pyle bowen

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Gale watch from Saturday evening through late Sunday night for
coastal waters from CAPE shoalwater wa to florence or out
60 nm.

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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 mi27 min 52°F5 ft
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 30 mi37 min S 16 G 18 52°F 53°F5 ft1025.9 hPa (+0.4)46°F
46T29 34 mi27 min S 14 G 16 52°F 53°F5 ft1026.7 hPa (+0.3)46°F
46248 - Astoria Canyon, OR (179) 38 mi32 min 54°F6 ft
46211 - Grays Harbor, WA (036) 44 mi27 min 52°F5 ft

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR8 mi32 minSE 610.00 miOvercast42°F41°F96%1026.6 hPa

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Last 24hrE4S3CalmCalmSE6E4SE4SE4CalmNE3SE4SW7W9SW8SW7SW8SW5S4S4SE4SE5S7SE6SE6
1 day agoSW5SE4N46SE5SE93SE4N8N8NE5SE7S7SE9S5SE9SW4SW5--SW8E4SE4SE5SE6
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Tide / Current Tables for Chinook, Baker Bay, Washington
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Chinook
Click for Map
Sat -- 12:45 AM PST     7.42 feet High Tide
Sat -- 03:42 AM PST     New Moon
Sat -- 06:02 AM PST     2.55 feet Low Tide
Sat -- 07:17 AM PST     Moonrise
Sat -- 07:21 AM PST     Sunrise
Sat -- 12:17 PM PST     8.75 feet High Tide
Sat -- 04:39 PM PST     Sunset
Sat -- 05:20 PM PST     Moonset
Sat -- 06:51 PM PST     -0.46 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.27.46.75.54.132.52.945.46.98.18.78.57.25.23.21.3-0-0.40.11.53.25

Tide / Current Tables for Columbia River entrance (N. Jetty), Washington
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Columbia River entrance (N. Jetty)
Click for Map
Sat -- 12:31 AM PST     6.81 feet High Tide
Sat -- 03:42 AM PST     New Moon
Sat -- 05:54 AM PST     2.38 feet Low Tide
Sat -- 07:18 AM PST     Moonrise
Sat -- 07:22 AM PST     Sunrise
Sat -- 12:03 PM PST     8.21 feet High Tide
Sat -- 04:40 PM PST     Sunset
Sat -- 05:21 PM PST     Moonset
Sat -- 06:43 PM PST     -0.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.76.764.83.62.72.42.83.95.36.77.88.27.86.44.62.71.1-0-0.30.41.73.34.9

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 Portland, OR (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.