Wednesday, January17, 2018

Marine Weather and Tides
Westport, 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 7:46AMSunset 4:58PM Wednesday January 17, 2018 1:02 AM PST (09:02 UTC) Moonrise 8:10AMMoonset 5:49PM Illumination 0% Phase: New Moon; Moon at 1 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- 841 Pm Pst Tue Jan 16 2018
.small craft advisory for rough columbia river bar in effect through late Wednesday night...
In the main channel..Combined seas will be around 10 ft tonight and increase to 15 feet Wednesday morning. Seas will increase to 20 feet by Wednesday evening. However, seas will temporarily build to 14 ft during the ebb around 5 am Wednesday morning and to 21 feet with breakers during the strong ebb around 5pm Wednesday evening.
PZZ200 841 Pm Pst Tue Jan 16 2018
Synopsis for southern washington and northern oregon coast.. A 960 mb surface low will move north along 145 west longitude Wednesday and be near haida gwaii by early Thursday. A strong cold front crosses the waters late Wednesday, which will result in storm force wind gusts late Wednesday afternoon through Thursday evening. The strong low will also generate very high seas around 30 feet late Wednesday night through Thursday. The active pattern continues into the weekend with combined seas in the upper teens to lower 20s through at least Sunday morning.

7 Day Forecast for Marine Location Near Westport CDP, OR
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location: 46.15, -123.31     debug

Area Discussion for - Portland, OR
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Fxus66 kpqr 170501
area forecast discussion
national weather service portland or
900 pm pst Tue jan 16 2018

Synopsis Another low will approach the coast tonight and Wednesday
then stall offshore the british columbia coast Thursday
and Friday. This low will bring a dry warm front to the area
Wednesday followed by a moist cold front Wednesday night and
Thursday. Steady showers are expected Thursday and Friday with snow
levels below the cascade passes. Showers continue this weekend as the
low weakens and moves inland, with a stronger front providing for
heavier mountain snow on Saturday and Sunday.

Short term Tonight through Friday. The next low pressure center
near 41n 144w with a occluded and warm front extending to the east.

Appears that a triple point is near 44n 138w based on satellite loop.

This system will track toward the northeast through Wednesday, then
stall near haida gwaii through Friday as it slowly fills. Some light
rain is possible overnight as the leading warm front crosses the
region, but expect rather minimal rainfall mostly along the coast and
in portions of southwestern washington; elsewhere, expect the
willamette valley and oregon cascades south of mount hood to remain
mostly dry overnight. Snow levels will rise above the cascade passes
as warm air moves into the region Wednesday behind this front, and
afternoon high temperatures may remain above seasonal normals across
most of the region.

The cold front associated with this disturbance will push onshore
late Wednesday afternoon and push inland to the cascades by Wednesday
night. This will bring a round of heavy rain near the front as it
moves across the region. Expect around one inch of rain at the coast
and in the willamette valley, with up to 1.5 inches in the cascades.

A burst of gusty winds can be expected along the coast as the front
pushes onshore Wed afternoon - primarily along the beaches and
headlands - with gusts 45 to 55 mph. However, the alignment of the
pressure pattern remains a bit unfavorable for high winds to mix
down and develop across a widespread area of the coastal towns. The
best time for peak winds appear to be between 1 and 5 pm.

Large swell arrives in the coastal waters are expected to bring high
surf to the beaches late Wednesday and Thursday. Those who will head
to the coastline should exercise caution and remain a safe distance
away from the beaches and jetties as potentially dangerous large
waves can move onshore with little notice.

Remainder of previous discussion unchanged...

behind the front, a colder air mass aloft will filter in to the
region and bring snow levels back down to near the cascade passes on
Thursday. Snow levels will continue to lower further, down to around
2,500 feet by later Thursday through Friday. The parent low pressure
will stall off the british columbia coast, which will maintain a
decent flow of moisture across the region into Friday. While no
single time period Thursday or Friday looks to receive an excessive
amount of snow, expect rather steady rounds of light snow with
anywhere from 1 to 4 inches per 6 hour period. At this point, expect
that accumulations will remain below advisory or warning criteria
through Friday, though localized heavier amounts are probable at the
higher elevations (above 6,000 feet). At the lower elevations, fairly
widespread showers will continue Thursday and Friday with another 1
to 1.5 inches of rain likely to accumulate. Afternoon high
temperatures will trend much closer to seasonal normals on Friday and
remain in the mid 40s. cullen

Long term Friday night through Tuesday... Active weather pattern
continues through the weekend. Wave after wave of energy will push
into the washington and oregon coast from a broad trough of low
pressure over the gulf of alaska. With this moisture, snow levels
will be down 2000 to 3000 ft, so this will be a great pattern to
build the snowpack in the cascades. This will also, however, mean
those planning travel through the cascades this weekend will need to
be prepared for snow, which could be heavy at times. Rain on the
coast and in the willamette valley will mean rises on rivers across
the area as well, though we are starting out with fairly low river
levels for this time of year.

There's some uncertainty in the pattern early next week, but general
consensus is that we may get a break in the precip late Monday into
Tuesday, with either broad or amplified ridging over the west coast.

Left a slight chance for pops because with a more broad ridge, can't
rule out precip completely. -mccoy

Aviation Vfr conditions through the period. Occasional MVFR
cigs and visibilities are possible as precipitation rates
increase tomorrow afternoon, but expect mostlyVFR conditions
through the period. Best chance for MVFR conditions at konp.

Gusty east winds have now returned at kttd a bit ahead of
schedule. Given the gradient, may only have occasional gusts
for a few hours before prevailing gusty winds continue as the
surface low drifts towards the area.

Pdx and approaches...VFR to be the dominant flight category at
the terminal through the period. East winds will start to
strengthen later tonight. Bentley

Marine A strong surface low center is forecast to deepen to
960 to 965 mb and be near 45n 140w by 12z wed. The 12z NAM has
come more in line with the GFS and ECMWF regarding the central
pressure. The low moves northeast Wed and will send a warm front
across the waters late tonight with a strong trailing cold front
late Wednesday afternoon. Expect solid gales to develop over the
far outer waters around 06z Wed and then spread east overnight
and into Wed morning. The 12z guidance shows the potential for a
relatively short period of 50-55 kt gusts late Wed afternoon into
wed evening, primarily over the outer waters. The NAM suggests
the possibility of coastal jet enhancement Wed afternoon, with up
to 75 kt wind speeds at 925 mb. The forecast surface isobar
orientation 00z Thu shows some southeast component, which is not
favorable for enhanced mixing. Therefore, not confident a coastal
jet will develop, but feel it is prudent to mention the

Increasing confidence that storm force gusts will occur and have
upgraded the gale warning to a storm warning valid 18z wed
through 03z thu. Strongest wind likely to occur over the outer
waters between 20z and 00z Thu and an hour or two later for the
inner waters. Post frontal gales to then continue for the outer
waters later Wed evening into thu. 12z GFS and 12z ECMWF have
trended weaker with the late Sat Sun system. Will go with
marginal gale force wind Sat evening.

Seas will continue in the lower teens today then build to the
upper teens by mid-day Wednesday. The highest seas are expected
to move inside 60 nm by daybreak Thursday. The 12z spectral
guidance and enp graphical output have come more in line with the
earlier ECMWF runs indicating peak wave heights near 30 ft late
wed night Thu morning. The ECMWF remains about 2-4 ft lower.

There is growing confidence that areas of the shoreline will be
highly impacted beginning late Wed night by the expected large
waves. The local coastal flood index tool gives an output value
of 23. Coastal flood warning criteria is 22. The forecast value
assumes a slightly higher tidal anomaly. In any event, 30-33 ft
west swell with 15-18 second periods will contain an enormous
amount of energy. One thing to keep in mind is there will likely
be isolated higher waves. Seas diminish fri, but will remain
above 20 ft through Fri night, then ease to the upper teens sat.


Pqr watches warnings advisories
Or... Coastal flood warning from midnight Wednesday night to midnight
pst Thursday night for central oregon coast-north oregon

Wa... Coastal flood warning from midnight Wednesday night to midnight
pst Thursday night for south washington coast.

Pz... Small craft advisory until 2 am pst Wednesday for waters from
cape shoalwater wa to florence or from 10 to 60 nm.

Storm warning from 10 am to 7 pm pst Wednesday for coastal
waters from CAPE shoalwater wa to florence or out 60 nm.

Gale warning from 2 am to 10 am pst Wednesday for waters from
cape shoalwater wa to florence or from 10 to 60 nm.

Small craft advisory for rough columbia river bar until 4 am
pst Thursday.

Small craft advisory until 10 am pst Wednesday for coastal
waters from CAPE shoalwater wa to florence or out 10 nm.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 19 mi44 min 44°F1019.6 hPa
ASTO3 - 9439040 - Astoria, OR 25 mi44 min WSW 2.9 G 8 49°F 1017.2 hPa
46243 - Clatsop Spit, OR - 162 44 mi32 min 51°F9 ft

Wind History for Longview, WA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA22 mi66 minSSE 310.00 miFair44°F42°F93%1020.7 hPa

Wind History from KLS (wind in knots)
Last 24hrSE11SE6SE4SE5S10SE8SE5SE5SE8S6S7SE7SE5S6SE5--S3S4CalmCalmCalmS3S3SE4
1 day agoCalmS5W7CalmCalmCalmCalmCalmCalmCalmSE8W5SE5S114SE3S14
2 days agoCalmCalmCalmCalmCalmNE3NE3CalmCalmSW3CalmCalmS4S96SE4CalmSE5SE7CalmCalmN3CalmW3

Tide / Current Tables for Eagle Cliff, Washington - IGNORE HEIGHTS
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Eagle Cliff
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 -- 03:46 AM PST     7.88 feet High Tide
Wed -- 07:50 AM PST     Sunrise
Wed -- 08:09 AM PST     Moonrise
Wed -- 10:30 AM PST     3.37 feet Low Tide
Wed -- 02:50 PM PST     9.13 feet High Tide
Wed -- 04:56 PM PST     Sunset
Wed -- 05:49 PM PST     Moonset
Wed -- 11:15 PM PST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Skamokawa, Steamboat Slough, Washington - IGNORE HEIGHTS
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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 -- 02:59 AM PST     7.88 feet High Tide
Wed -- 07:51 AM PST     Sunrise
Wed -- 08:10 AM PST     Moonrise
Wed -- 09:14 AM PST     3.37 feet Low Tide
Wed -- 02:03 PM PST     9.13 feet High Tide
Wed -- 04:57 PM PST     Sunset
Wed -- 05:49 PM PST     Moonset
Wed -- 09:59 PM PST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of PacificNorthwest    EDIT

Wind Forecast for Portland, OR (4,6,7,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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 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 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.