Friday, April20, 2018 L-36.com


Marine Weather and Tides
Cascade Locks, OR

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:11AMSunset 8:04PM Friday April 20, 2018 8:50 PM PDT (03:50 UTC) Moonrise 8:51AMMoonset 12:00AM Illumination 32% Phase: Waxing Crescent; Moon at 6 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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7 Day Forecast for Marine Location Near Cascade Locks, OR
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location: 45.68, -121.87     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 202057
afdpqr
area forecast discussion
national weather service portland or
157 pm pdt Fri apr 20 2018

Synopsis Dry and mild weather today before a cold front spreads
light rain and cascade snow across the region tonight. Some
showers may linger over the cascades Saturday morning, but otherwise
the day will be dry, but cool. Dry weather continues Sunday into next
week. Temperatures are expected to warm well into the 70s next week
as a thermal trough settles over NW oregon and offshore flow
develops.

Short term This afternoon through Tuesday... Dry and mild weather
continues today with increasing high clouds ahead of an approaching
front. A warm front brushes by to the north this afternoon with
little impact to the weather. Radar shows some echoes moving inland
this afternoon with the front, but surface observations and webcams
confirm that precip is not reaching the ground at this point.

However, the cold front will produce light rain along the coast this
evening, moving inland late tonight. Snow levels will be around 5000
feet for the south washington cascades and 7000 feet for the
cascades of lane county when the precipitation arrives tonight. The
snow levels then lower to 3500-4500 feet Saturday morning as light
showers linger over the cascades. The highest forecast rainfall
amounts this afternoon through Saturday afternoon are around 0.20
inches along the north coast, the willapa hills, and the south
washington cascades. In other words, rain will be light. The
willamette valley, especially south of salem, is not expected to see
much rain at all (0.01-0.05 inch). The cascades can expect a few
inches of new snow with no expected impacts for the cascade passes.

A few showers will linger over the the cascades and across extreme sw
washington Saturday morning, but most areas west of the cascades will
remain dry Saturday. Cool and cloudy conditions with onshore flow are
expected Saturday in the wake of a cold front. Dry weather continues
Sunday with surface high pressure building over the area. A shortwave
upper trough may keep some clouds around and somewhat limit heating
Sunday, but the afternoon temperatures will still peak slightly above
the seasonal normals.

A sharp upper ridge moves over the pacific NW Sunday night through
Tuesday, continuing dry weather. A thermal trough develops along the
coast Sunday night and persists through Tuesday for offshore flow and
a warming trend. Models continue to warm from run to run, and 80
degrees now seems likely in the valley by Tuesday. Bowen

Long term Tuesday night through Friday... Models continue their
agreement in showing continued high pressure and dry, warm conditions
through much of next week. Have warmed the forecast further Wednesday
and Thursday, reflecting guidance trends.

Models have even come into general agreement on the track of an upper
low which moves south off the west coast through midweek. This low
looks likely to be the source of the next rain chances in the long
term period as it tracks back north late in the week and sweeps a
trough across western oregon starting Friday. As it passes, it's
likely to force some shower development, with both the GFS and ecmwf
indicating precipitation accumulation starting Friday. Have kept
slight chance pops Friday, although will need to up them if model
solution remain consistent in the coming days. With the upper low
tracking from the south, the environment should be warm with snow
levels well above the cascade passes, i.E. Rain for the cascades.

Bowen

Aviation ExpectVFR conditions through this evening along the
coast and through tonight in the interior. Mid and high clouds
will continue to increase ahead of an approaching cold front.

This front will bring periods of light rain and MVFR CIGS to
coastal TAF sites later this evening. Rain will spread inland
overnight and could bring brief periods of MVFR CIGS to interior
taf sites late tonight early Sat morning. Conditions across the
forecast area look to improve towardsVFR Sat morning, with
clouds clearing through Sat afternoon evening.

Kpdx and approaches...VFR continues through tonight under
increasing mid and high clouds. Light rain, with occasional MVFR
cigs, look to impact the terminal after midnight tonight. Expect
conditions to improve Sat morning behind the front, with clouds
clearing Sat afternoon evening. 64

Marine A front moving eastward across the waters tonight will
bring small craft advisory level wind gusts of 25 to 30 kt to the
waters. Expect the strongest winds across the northern waters.

Seas will climb into the 9 to 12 ft range by early Saturday
before subsiding Saturday afternoon.

Thermal low pressure over northern california will build
northward along the oregon coast over the weekend. This will
allow a summer-like northerly wind pattern to develop over the
weekend. Winds may turn offshore for a day or two early next week
with gusty winds of 20 to 25 kt possible across the waters
adjacent to the coastal gaps. Surface high pressure looks to
return to the northeast pacific towards the middle of next week,
which should result in winds turning lighter with seas remaining
under 10 ft. Neuman

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for winds from 6 pm this evening to 11 am
pdt Saturday for coastal waters from CAPE shoalwater wa to
cascade head or out 60 nm.

Small craft advisory for hazardous seas from midnight tonight
to 9 pm pdt Saturday for coastal waters from cape
shoalwater wa to cascade head or out 60 nm.

Small craft advisory for winds from 8 pm this evening to 9 am
pdt Saturday for coastal waters from cascade head or to
florence or out 60 nm.

Small craft advisory for hazardous seas from midnight tonight
to 3 pm pdt Saturday for coastal waters from cascade head
or to florence or out 60 nm.

Small craft advisory for rough columbia river bar from 7 pm to
11 pm pdt this evening.

Small craft advisory for rough columbia river bar from 5 am to
2 pm pdt Saturday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 65 mi51 min 49°F1022.6 hPa (+0.6)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from CZK (wind in knots)
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Last 24hr24------------------------SW12
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SW6W6----SW65SW5
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1 day ago53------------------------322SW632SE2E21S2
2 days ago----------------------------1214334434

Tide / Current Tables for Ellsworth, Washington - IGNORE HEIGHTS
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Ellsworth
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

Fri -- 12:24 AM PDT     Moonset
Fri -- 06:15 AM PDT     Sunrise
Fri -- 06:51 AM PDT     2.32 feet Low Tide
Fri -- 09:54 AM PDT     Moonrise
Fri -- 10:49 AM PDT     9.10 feet High Tide
Fri -- 07:47 PM PDT     -0.52 feet Low Tide
Fri -- 08:03 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.46.964.93.932.52.33.56.18.49.18.77.76.24.52.81.40.3-0.3-0.50.73.15.4

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

Fri -- 12:24 AM PDT     Moonset
Fri -- 06:16 AM PDT     Sunrise
Fri -- 06:26 AM PDT     2.32 feet Low Tide
Fri -- 09:54 AM PDT     Moonrise
Fri -- 10:23 AM PDT     9.10 feet High Tide
Fri -- 07:22 PM PDT     -0.52 feet Low Tide
Fri -- 08:03 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.26.65.64.53.52.82.42.64.57.28.998.37.15.53.82.20.9-0-0.5-0.21.64.16.2

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Portland, OR (23,6,7,8)
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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.