Saturday, December16, 2017 L-36.com


Marine Weather and Tides
Vancouver, 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 7:44AMSunset 4:29PM Saturday December 16, 2017 8:43 AM PST (16:43 UTC) Moonrise 6:03AMMoonset 3:53PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 124 Am Pst Sat Dec 16 2017
.small craft advisory for rough columbia river bar in effect this afternoon...
In the main channel..Combined seas 5 to 7 ft through Saturday. However, seas will temporarily build to around around 8 ft during the ebb around 315 am this morning and to 10 feet with breakers possible during the strong ebb around 330 pm this afternoon.
PZZ200 124 Am Pst Sat Dec 16 2017
Synopsis for southern washington and northern oregon coast.. The next week front is expected late tonight and Sunday. A stronger cold front will move across the pac nw waters Tue.

7 Day Forecast for Marine Location Near Vancouver, WA
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location: 45.6, -122.62     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 161058
afdpqr
area forecast discussion
national weather service portland or
258 am pst Sat dec 16 2017

Synopsis Cool cloudy weather will continue this weekend, along
with areas of rain, though rain threat mainly north of a tillamook to
mt hood line. Not much change in the pattern until tue, then will see
much stronger front arrive, with rain and mountain snow increasing.

Then will turn colder but dry later next week.

Short term Today through Monday... Main weather challenge this am
is the areas of fog and low clouds along with patchy freezing fog. As
temperatures dropped below freezing Fri evening, the moisture on the
roads froze, resulting in slick roads due to what is common called
'black ice.' now, with fog in place, likely will continue to see
slick spots into this morning, primarily in the rural areas from the
coast mountains across the interior lowlands to the cascades
foothills.

Otherwise, not much change to the current weather pattern. Moist
westerly flow maintain steady stream of moisture aloft in the pac nw,
but most of the precipitation will be over british columbia and
western washington, and just brushing northwest oregon at times this
weekend. Seems highest threat of precipitation will be late tonight
into Sun am. Appears areas south of a newport-albany line will
generally be dry, but expect decent amount of valley fog in the
overnight and early morning hours.

Snow levels will hover between 2500 and 3500 feet today and tonight,
then slowly rise back to 4000 to 5000 feet later sun. But since not a
lot of QPF expected, suspect will generally only get a few inches of
new snow for the cascades, with 2 to 5 inches over south washington
cascades. Not enough for advisories, but since been a while since had
snow, motorists should be prepared for snowy and slick conditions at
times over the cascades, from santiam pass northward. Rockey.

Long term Monday night through Friday... We start next week under
relatively flat, zonal flow with a broad ridge off the coast of
california and an approaching trough coming out of the gulf of
alaska. We will see our first widespread rain in a while with this
system starting Tuesday morning and continuing through Wednesday
morning, with rainfall amounts around an inch for most of the area.

Snow levels will be falling through this event, starting around 5000-
5500 ft Tuesday morning, and falling to around 1500 ft by Wednesday
morning. Showers will be tapering off midday Wednesday. 1000-500-mb
thicknesses drop down to 523 dam, and 850 temps only lower down to
-4c while precip is falling, indicating no chance for snow down to
the valley floor with this system, though locations in the cascade
foothills and coast range could see a dusting of snow down to 1500
ft on Wednesday as precip is coming to an end. Good news for skiers
is that with ~1 inch of liquid equivalent, and snow levels starting
around 5500 ft, the resorts could see a foot of snow with this
system.

Beyond Wednesday, ridging builds back up over the eastern
pacific and along the west coast. Ensemble members generally agree
on some sort of a ridge over the eastern pacific, though the exact
positioning is in flux. Most models suggest another dry spell
continuing into the weekend, with the return of east winds. Only
difference from this last dry spell may be that model temperatures
in the columbia basin are looking a little colder, suggesting colder
air filtering into the willamette valley as we go into next weekend.

-mccoy

Aviation MostlyVFR conditions across the area with a mix of
ifr to lifr in fog for the interior. Also sub-freezing
temperatures for some locations inland is likely leading to some
freezing fog south of kuao and near khio. Fog development is
complicated by approaching warm front sending mid level clouds
into the area so expect variable conditions through this
morning. An increase in wind and thickening clouds may help
dissipate the fog, but weak warm air advection will bring lowVFR
or MVFR CIGS and rain chances later today and probably tonight
as well.

Pdx and approaches... Moderate chances for fog to bring vsby
restrictions near or even at the terminal this morning. Otherwise
with advancing warm front, MVFR conditions becoming likely
later this morning and probably continuing through this evening.

Marine High pressure offshore bringing NW winds across the
waters this morning. Winds will back later today as a warm front
approaches. South to southwest winds increase tonight with gusts
to 25 kt expected west in zone pzz270. May see wind gusts to 25
kt over pzz250 sun. A stronger front is modeled to arrive on
tue, and looks like it has the potential to bring gale force
winds. Another front may arrive wed. Then weak offshore flow is
expected to develop in the late week time period.

Seas are sitting just 8 to 9 ft and are slowly subsiding. However
with periods around 8 to 10 seconds, choppy steep seas are
occurring. Seas will continue to subside through the morning.

Seas remain in the 5-7 ft range later today through mon. The
stronger Tue front will likely push seas into the low to mid
teens before they drop off again during the second half of the
week. Mh

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for winds from midnight tonight to
7 am Sunday on coastal waters from CAPE shoalwater
to florence from 10 to 60 nm offshore.

Small craft advisory for hazardous seas for all coastal
waters until 9 am today.

Small craft advisory for rough columbia river bar from 2 pm
this afternoon to 6 pm pst 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 39 mi152 min 43°F1027.5 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 69 mi152 min 49°F1027.8 hPa
ASTO3 - 9439040 - Astoria, OR 74 mi152 min ESE 1 G 2.9 46°F 1026.5 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Airport, OR1 mi51 minSE 510.00 miOvercast40°F37°F93%1028.2 hPa
Pearson Airfield, WA3 mi51 minN 010.00 miOvercast41°F39°F93%1028.1 hPa
Portland, Portland-Troutdale Airport, OR12 mi51 minN 05.00 miFog/Mist40°F37°F93%1028.3 hPa
Scappoose Industrial Airpark, OR17 mi51 minN 02.50 miFog/Mist34°F33°F97%1028.1 hPa
Portland-Hillsboro Airport, OR18 mi51 minN 01.75 miFog/Mist32°F30°F92%1028.5 hPa

Wind History from PDX (wind in knots)
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Last 24hrCalmE9S5CalmCalmE3NE4S3E5E5SE3CalmCalmSE4E5E4E5E3E4E5SE5CalmSE6SE5
1 day agoE11
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E16E13E14SE12SE11SE11SE12SE10SE13SE10SE11SE9SE11SE8NE4E5E6SE6E3E5CalmE7Calm
2 days agoNW3W3CalmCalmNW43SE8SE10SE12SE13SE14SE12SE8SE14SE10SE15E12NW4NE4SE10
G14
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G16
E10E5

Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
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Vancouver
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 -- 01:45 AM PST     0.07 feet Low Tide
Sat -- 06:02 AM PST     7.62 feet High Tide
Sat -- 06:02 AM PST     Moonrise
Sat -- 07:45 AM PST     Sunrise
Sat -- 01:25 PM PST     2.91 feet Low Tide
Sat -- 03:53 PM PST     Moonset
Sat -- 04:27 PM PST     Sunset
Sat -- 05:29 PM PST     9.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.30.11.54.16.57.67.46.85.954.13.433.257.49.19.38.77.66.14.63

Tide / Current Tables for Portland, Willamette River, Oregon - IGNORE HEIGHTS
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Portland
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 -- 01:44 AM PST     0.07 feet Low Tide
Sat -- 05:22 AM PST     7.62 feet High Tide
Sat -- 06:02 AM PST     Moonrise
Sat -- 07:44 AM PST     Sunrise
Sat -- 01:24 PM PST     2.91 feet Low Tide
Sat -- 03:53 PM PST     Moonset
Sat -- 04:27 PM PST     Sunset
Sat -- 04:49 PM PST     9.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.20.22.15.27.47.57.16.45.64.73.93.32.93.45.88.59.498.16.95.54.12.6

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 (11,2,3,4)
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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.