Monday, December11, 2017 L-36.com


Marine Weather and Tides
Cascade Locks, 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 7:39AMSunset 4:27PM Monday December 11, 2017 2:36 PM PST (22:36 UTC) Moonrise 12:50AMMoonset 1:23PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Cascade Locks, OR
   Hourly   EDIT   Help
location: 45.68, -121.87     debug


Area Discussion for - Portland, OR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kpqr 111758
afdpqr
area forecast discussion
national weather service portland or
958 am pst Mon dec 11 2017

Synopsis High pressure will continue to bring cool temperatures
and areas of morning fog and frost before a transition to a more
typical wet december pattern returns towards the weekend.

Short term Today through Wednesday... An upper level ridge of high
pressure will remain over the pacific NW for the next few days. The
general pattern will remain the same, with a subsidence inversion
bringing areas of cool temps, fog and low clouds to the wind
protected inland valleys, with warmer air above the inversion in the
cascades. A shortwave trough, seen lifting north west of 130w and
south of 40n early this morning, will pass across the top of the
ridge later tonight. This results in the ridge weakening a little
today and tonight before strengthening again and shifting west on
Wednesday. Models continue to show the offshore flow through the
gorge weakening today into Tuesday as a result of the weakening ridge
aloft. Surface pressure gradients through gorge peaked near -12mb
between kttd and kdls Sun evening, and are expected to progressively
weaken through Tuesday. While it will remain notably windy through
the western portions of the gorge, impacts should become less as wind
speeds gradually diminish. Models show some light precipitation
moving up to the coast tonight with the tail end of a weakening
front, but model time-height cross sections show a lack of depth to
moisture reaching the coast. With only weak forcing, will keep any
mentionable pops well off the coast.

Long term Wednesday night through Sunday... No changes. Previous
discussion follows. Ridging will keep us dry into Thursday. Models
have pushed back the onset of precipitation to 10pm Thursday night
at the earliest on the coast and Friday morning in the willamette
valley. This may help lower the chance for freezing rain in the hood
river valley. The later the precip arrives in the morning, the less
chance of freezing rain at onset. This is still a time period to
watch over the next few days.

Once rain starts, we get into more of a zonal flow pattern as the
ridge of high pressure gets squashed down by a longwave trough
digging into the gulf of alaska over the weekend. This means our
winter rains return. We may get a break in the precipitation on
Saturday before another system swings through on Sunday, but the
timing of this break is uncertain at this time.

Snow levels will be coming down to 3000 to 4000 ft behind this first
front Friday night, bringing snow to the resorts passes Friday night
into early Saturday morning. Snow levels lift back up to 6000-8000
ft for the onset of the next system on Sunday. -mccoy

Aviation No significant changes. Previous forecast below...

persistent dry offshore wind pattern continues. Gusty winds will
continue in and near the columbia river gorge, but are expected
to weaken slightly tonight. Offshore winds will keep most of the
regionVFR for the next 24 hrs. Exceptions will be in the
southern willamette valley, where ifr freezing fog will remain
through most of the morning, and MVFR stratus that will remain in
the columbia basin extending into the columbia gorge hood river
valley.

Pdx and approaches...VFR continues through the next 24 hrs. Gusty
offshore winds will gradually weaken this morning, before
increasing again this afternoon. Pyle

Marine No significant changes. Previous forecast below...

high pres remains over the pac NW through most of the upcoming
week. A weak front will enter the coastal waters today and
tonight. Should have little impact, other than some gusts in the
20-23 kt range over the far outer waters this afternoon. Based on
the latest model guidance, do not expect that we will need a
small craft advisory, but will be monitoring the situation.

Generally, seas will be running 5 to 7 ft today, but a mix of
swell trains will keep periods bouncing between 12 and 16 sec.

Seas will build a bit more tonight and tue, but look to stay in
the 8 to 10 ft range at this time.

Offshore winds and generally benign conditions will then continue
through most of the week. The next front is set to arrive fri,
with more active weather for the weekend. Pyle

Pqr watches warnings advisories
Or... Air stagnation advisory until 2 pm pst Thursday for central
willamette valley-lower columbia-south willamette valley.

Wa... Air stagnation advisory until 2 pm pst Thursday for greater
vancouver area-i-5 corridor in cowlitz county.

Pz... None.

Interact with us via social media:


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 65 mi49 min 44°F1029.4 hPa

Wind History for Longview, WA
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from CZK (wind in knots)
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hr24------------------------SW12
G20
SW6W6----SW65SW5
G15
5SW11
G18
1 day ago53------------------------322SW632SE2E21S2
2 days ago----------------------------1214334434

Tide / Current Tables for Ellsworth, Washington - IGNORE HEIGHTS
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
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

Mon -- 12:52 AM PST     Moonrise
Mon -- 01:14 AM PST     7.30 feet High Tide
Mon -- 07:40 AM PST     Sunrise
Mon -- 09:34 AM PST     1.33 feet Low Tide
Mon -- 01:25 PM PST     Moonset
Mon -- 02:19 PM PST     8.66 feet High Tide
Mon -- 04:26 PM PST     Sunset
Mon -- 10:34 PM PST     2.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.37.37.26.65.74.73.62.71.91.41.52.95.17.38.68.587.164.83.82.92.42.4

Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
   EDIT      (on/off)   Help   One Week of Data
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

Mon -- 12:48 AM PST     7.30 feet High Tide
Mon -- 12:53 AM PST     Moonrise
Mon -- 07:41 AM PST     Sunrise
Mon -- 09:09 AM PST     1.33 feet Low Tide
Mon -- 01:26 PM PST     Moonset
Mon -- 01:53 PM PST     8.66 feet High Tide
Mon -- 04:26 PM PST     Sunset
Mon -- 10:09 PM PST     2.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.87.376.35.34.23.22.31.61.31.93.86.188.78.37.66.65.54.43.32.62.32.8

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Portland, OR (17,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Portland, OR
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.