Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Cedar Mill, OR

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 7:38AMSunset 5:09PM Wednesday January 24, 2018 3:33 AM PST (11:33 UTC) Moonrise 11:35AMMoonset 12:06AM Illumination 52% Phase: First Quarter Moon; Moon at 8 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- 303 Am Pst Wed Jan 24 2018
.small craft advisory for rough columbia river bar in effect through late tonight...
In the main channel..Combined seas 14 ft falling to near 10 ft midday, then building to near 15 ft early Thursday. However seas will temporarily build to 13 ft during the ebbs around 945 am and 945 pm today.
PZZ200 303 Am Pst Wed Jan 24 2018
Synopsis for southern washington and northern oregon coast.. A brief period between systems today. A fast moving low pressure and associated front is expected to move to the waters later this afternoon and evening. Another low pressure system moves to the water late tonight and early Thu. Both systems will likely bring gales to most waters. Another strong low is expected to move in from the sw on Fri night and Sat for more at least gale force winds and high seas.

7 Day Forecast for Marine Location Near Cedar Mill, OR
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location: 45.58, -122.77     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 240817
afdpqr
area forecast discussion
national weather service portland or
1216 am pst Wed jan 24 2018
update to headlines and marine section.

Synopsis A series of storm systems will bring periods of valley
rain and snow to the coast range and cascades through the weekend.

Short term Tonight through Friday... Water vapor satellite imagery
reveals a large low pressure system over the northeast pacific. A
modest atmospheric river ahead of a front is currently streaming into
the pacific northwest. This resulted in widespread light to moderate
rain and mountain snow to much of the region today. Rainfall totals
have remained rather modest and should continue to do so. As a
result, do not anticipate much in the way of any flood issues.

A weak surface low pressure appears to have developed along the
aforementioned front and is moving northeastward towards the olympic
peninsula. This has temporarily allowed winds to strengthen along the
immediate coast with a few gusts of around 60 mph reported at cape
disappointment, yaquina bay bridge and yachats this evening. Extended
the high wind warning earlier this evening given this development,
but these winds should start to taper off towards midnight.

Meanwhile, the weak low pressure that developed offshore this evening
has helped cold air to persist east of the cascades with a relatively
deep isothermal layer present. Snow appears to be sticking in the
upper hood river valley above ~1500 feet so opted to extend the
winter wx advisory through the overnight hours as pressure gradients
will be slow to relax overnight. Farther west, snow levels have risen
to around 4500-5000 feet where warmer air aloft has been able to
penetrate. Expect decent accumulations above this elevation in the
cascades, but given the south to southwesterly flow, orographics will
be somewhat limited except across the volcanoes and winter storm
warning amounts may be difficult to achieve.

Once the front pushes ashore later tonight and winds drop off along
the coast, the front will slow considerably and result in off and on
rain for much of northwest oregon and southwest washington on
Wednesday. Colder air aloft will work its way eastward into the area
on Wednesday and lead to precipitation turning more showery in
nature. This will also result in snow levels lowering to below the
cascade passes Wednesday afternoon and evening. Fortunately,
precipitation in general should not be as persistent as it was today
so accumulations should remain at levels worthy of an advisory or
less.

Models are also suggesting at least two modest surface low pressures
will develop and move east to northeastward into the pacific
northwest including one Wednesday afternoon and another one on
Thursday. Expect each of these to bring a burst of winds to the
coast, but at this point winds are not anticipated to reach high wind
criteria with either system.

Onshore flow and a cool and unstable airmass will result in
additional rounds of showers Thursday and Friday. Snow levels will
lower down to ~1500-2000' during this time with advisory level
accumulations possible across the coast range and cascade foothills.

Neuman

Long term Friday night through Tuesday. The active weather
pattern will continue into the weekend. Models are in fairly good
agreement tracking a low pressure system across the northeastern
pacific and across the forecast area. The trailing cold front
interacts with a fairly robust tap of moisture across the pacific,
transported in southwesterly flow as the main 500 mb pattern becomes
more zonal across the far eastern pacific and western conus. Snow
levels will increase as the air mass warms over the weekend through
early next week. However, confidence in the details of the forecast
remains a bit lower than normal, as the placement of the moisture
plume over the building ridge could either bring a period of heavy
rain to the region, or push north of the forecast area and keep our
region dry with the rain in northwestern washington. However,
confidence is a little higher for the start of next week as there is
general agreement that the next upper trough will swing across the
pacific northwester and bring another round of enhanced rain chances
along with lowering snow levels for the start of next week. Cullen

Aviation Tough TAF forecast with ceilings continuing to bounce
between MVFR andVFR across the area. Looks like occasional
visibilities below 6 miles during heavier rain, but tough to time
these visibility differences in the taf. Expect a mixture of
MVFR andVFR conditions across the area through the evening and
into the overnight hours, but keeping up with these changing
conditions in the TAF will be difficult. Conditions probably will
not change a lot on wed.

Pdx and approaches... Conditions expected to vary fromVFR to
MVFR at times in CIGS and vis. These conditions will probably
continue through much of wed. Pt

Marine Update - ended gale warning for all waters and will
have small craft advisory winds through early morning. Seas
however will remain in the 16 to 19 ft range through early
morning then subide to near 12 ft by mid to late morning.

The models show a secondary front and possible low moving through
the waters Wed afternoon and evening that could get winds close
to gale force again. This may be problematic in timing and
strength as the low is rapidly developing and fast moving system. Mh
one more low is expected late Wed night and Thu that could
produce another round of gales with seas back in the mid to upper
teens. The next strong system is expected Fri night and Sat with
more gales and seas in at least the mid teens. Pt

Pqr watches warnings advisories
Or... Winter weather advisory until 7 am pst this morning for upper
hood river valley.

Winter storm warning until 8 pm pst this evening for northern
oregon cascades.

Wa... Winter storm warning until 8 pm pst this evening for south
washington cascades.

Pz... Small craft advisory for winds until 4 am pst early this
morning for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for hazardous seas until 10 pm pst this
evening for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for rough columbia river bar until 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 38 mi46 min 44°F1008.8 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 61 mi46 min 51°F1008.6 hPa
ASTO3 - 9439040 - Astoria, OR 68 mi46 min SSE 6 G 8 49°F 44°F1006.8 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA6 mi41 minSE 410.00 miLight Rain49°F46°F90%1009.7 hPa
Portland, Portland International Airport, OR9 mi41 minS 310.00 miLight Rain48°F45°F89%1009.9 hPa
Portland-Hillsboro Airport, OR10 mi41 minSW 37.00 miLight Rain47°F44°F90%1009.2 hPa
Scappoose Industrial Airpark, OR14 mi41 minSE 710.00 miLight Rain48°F46°F93%1009.1 hPa
Portland, Portland-Troutdale Airport, OR20 mi41 minE 95.00 miLight Rain Fog/Mist43°F41°F93%1010 hPa
Aurora State Airport, OR23 mi41 minSW 45.00 miLight Rain Fog/Mist48°F46°F93%1009.9 hPa

Wind History from VUO (wind in knots)
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Last 24hrSE10SE10SE4E10E10SE8E6E10SE9E8E9E10E10SE9E10SE8SE9SE9SE9SE4SE7S11
G20
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1 day agoS4S3Calm3S54W4S5SW3CalmN4CalmSE4E6SE4SE4SE6SE4E5SE7E5E3SE3SE8
2 days agoE10E10S10
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S6S5SE5SE6SE6S6S5SE3E63S34E6SE6Calm

Tide / Current Tables for St. Johns, Willamette River, Oregon - IGNORE HEIGHTS
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St. Johns
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 -- 12:06 AM PST     Moonset
Wed -- 07:00 AM PST     1.70 feet Low Tide
Wed -- 07:40 AM PST     Sunrise
Wed -- 11:16 AM PST     8.64 feet High Tide
Wed -- 11:35 AM PST     Moonrise
Wed -- 02:20 PM PST     First Quarter
Wed -- 05:06 PM PST     Sunset
Wed -- 08:12 PM PST     2.28 feet Low Tide
Wed -- 11:52 PM PST     6.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.96.35.34.33.22.41.91.72.54.87.38.68.587.164.93.832.52.32.84.56.2

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

Wed -- 12:05 AM PST     Moonset
Wed -- 07:12 AM PST     1.70 feet Low Tide
Wed -- 07:40 AM PST     Sunrise
Wed -- 11:34 AM PST     Moonrise
Wed -- 11:53 AM PST     8.64 feet High Tide
Wed -- 02:20 PM PST     First Quarter
Wed -- 05:05 PM PST     Sunset
Wed -- 08:24 PM PST     2.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.16.65.84.73.62.621.72.13.96.38.18.68.47.66.65.34.23.22.62.32.53.85.5

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 (6,6,7,8)
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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.