Sunday, August9, 2020
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Marine Weather and Tides
Cascade Locks, OR

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:02AMSunset 8:27PM Sunday August 9, 2020 1:06 PM PDT (20:06 UTC) Moonrise 10:24PMMoonset 11:03AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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 091545 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 845 AM PDT Sun Aug 9 2020

SYNOPSIS. Warm and dry today and Monday, especially inland. A weak front will push across the region later Monday night, but no rain expected. This system will bring increased onshore flow, with milder temperatures. Not much change expected through rest of the week.

SHORT TERM. Today through Tuesday . No changes. Previous discussion follows. Rather benign pattern for the region over the next 24 to 36 hours. High pressure will sit over the Pac NW while thermal low pressure stays over far southwest Oregon. This will maintain dry northerly flow, with mostly clear skies today into Monday. The exception will be for areas of morning low clouds along the coast. Interestingly, will see breezy northerly winds this afternoon into this evening, with gusts 15 to 25 mph just about anywhere. Though windiest spots will be along the coast south of Lincoln City, where gusts 25 to 30 mph are likely on the beaches.

Air mass is warmer today and and bit more so on Monday, as apparent from the 850 mb temps in the middle to upper teens (deg C). Overall, this should correlate with high temperatures in the middle to upper 80s inland and lower 70s for areas along the coast away from the beaches.

Weak upper level system will swing inland on Monday. But, no rain expected. Instead, this system will usher in cooler air in the lower to mid levels, with increasing onshore flow in the afternoon into the evening. Will still be a warm day, with many inland locations into the 80s, and around 90 deg for areas south and east of Salem, as well as the eastern Columbia Gorge. But as the onshore flow kicks up, think highs from Kelso to Portland will stay in the middle 80s. Guidance has been trending this direction, though NBM as been more bullish on warmer temperatures. So, will cut forecast highs down a bit, and trend that would align closer with majority of models.

Is some question as to whether or not low clouds will push back to the coast later Monday night, and inland to some degree on Tuesday. Models not so much showing this trend, but feel that often, models are bit behind on showing such trends. Pattern recognition would support increasing low clouds forming along the coast later Monday night, and spreading into the interior via the Columbia River overnight into Tuesday. Will add morning clouds to the coastal and north inland areas, with partly to mostly sunny skies elsewhere. Nonetheless, the continued onshore flow on Tuesday will bring cooler temperatures for all area on Tuesday, with inland highs in the upper 70s to near 80. /Rockey

LONG TERM. Tuesday night through Saturday . No changes. Previous discussion follows. Models in general agreement in showing a broad upper trough moving across the Pacific Northwest during the coming week. Overall impressions are that the trough is not likely deep enough to bring much of a threat of showers to the region, but low level onshore flow will bring some diurnal clouds mainly to the coast and north interior along with temperatures a little cooler than normal through the end of the week. 12Z EC operational run is most bullish on showers Thursday into Thursday night, and given some support from some ensemble members, will keep a slight chance for showers then over southwest Washington. Friday into Saturday models have generally push the trough off to the east with some ridging aloft following it, so expect dry weather with warming temperatures.

AVIATION. Upper level high pressure will build offshore today as a weak upper level disturbance moves across the area. Expect VFR conditions to prevail through Monday morning, except north coastal areas including KAST see a chance for a low marine stratus to develop after 14Z with IFR conditions. Other than that it will be a breezy day at the coast with northerly winds gusting 20-30 kt in the afternoon, with the strongest winds on the central Oregon coast. Inland winds will also become gusty this afternoon, mainly south of KSLE with gusts around 20 kt. Winds will ease in the evening hours after 03Z.

KPDX and APPROACHES . VFR continues next 24 hours. Northwest winds gusting 15 to 20 kt develop in the afternoon and evening hours before subsiding after 03Z.

MARINE. No changes. Previous discussion follows. High pressure continues across the waters through early in the week with an thermally induced trough over the far south Oregon coast. Northerly winds gusting 20-30 kt with strongest winds south of Cascade Head and during the afternoon and evening with daytime heating. Nearshore winds will be strongest today and tonight and will likely drop below 20 kt during the night and into the morning hours. Small craft conditions will likely persist into Monday before easing from north to south Monday afternoon and evening. Seas will remain elevated, but will start to subside by Wednesday. Seas will be choppy with seas around 6 to 8 ft today and near 10 ft tonight and Monday.

The remainder of next week looks to be rather benign with seas around 4 to 6 ft and gusts below 15 kt. /42

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 3 PM PDT Monday for coastal waters from Cape Shoalwater WA to Cascade Head OR out 60 NM.

Small Craft Advisory until 11 PM PDT Monday for coastal waters from Cascade Head OR to Florence OR out 60 NM.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 65 mi48 min 71°F1024 hPa

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

Link to 5 minute data for KCZK

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

Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
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Sun -- 06:04 AM PDT     Sunrise
Sun -- 07:37 AM PDT     0.33 feet Low Tide
Sun -- 11:40 AM PDT     1.44 feet High Tide
Sun -- 12:07 PM PDT     Moonset
Sun -- 04:02 PM PDT     0.53 feet Low Tide
Sun -- 04:53 PM PDT     0.53 feet High Tide
Sun -- 07:45 PM PDT     0.27 feet Low Tide
Sun -- 08:26 PM PDT     Sunset
Sun -- 11:26 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.310.80.80.70.60.40.40.611.41.41.20.80.60.50.50.50.30.30.50.91.4

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
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Sun -- 12:49 AM PDT     1.38 feet Low Tide
Sun -- 06:06 AM PDT     6.30 feet High Tide
Sun -- 06:06 AM PDT     Sunrise
Sun -- 12:11 PM PDT     Moonset
Sun -- 12:46 PM PDT     0.79 feet Low Tide
Sun -- 06:38 PM PDT     7.07 feet High Tide
Sun -- 08:31 PM PDT     Sunset
Sun -- 11:29 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.423.34.75.86.36.15.242.71.610.81.42.84.566.976.55.44.12.9

Weather Map
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wmap_P
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (16,3,4,5)
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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 numerous 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.