Thursday, February20, 2020
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Marine Weather and Tides
Minnehaha, WA

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 7:03AMSunset 5:45PM Thursday February 20, 2020 4:57 PM PST (00:57 UTC) Moonrise 5:49AMMoonset 2:49PM Illumination 8% Phase: Waning Crescent; Moon at 27 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- 244 Pm Pst Thu Feb 20 2020
In the main channel.. - general seas...4 to 6 ft through Friday. - first ebb...around 245 pm Thursday. Seas to 7 ft. - second ebb...around 315 am Friday. Seas to 7 ft. - third ebb...strong ebb around 330 pm Friday. Seas to 8 ft.
PZZ200 244 Pm Pst Thu Feb 20 2020
Synopsis for the southern washington and northern oregon coast.. High pressure through Sat afternoon. A front along the leading edge of a 990 mb low in the eastern gulf of alaska will move over the waters late Sat night through Sun.


7 Day Forecast for Marine Location Near Minnehaha, WA
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location: 45.62, -122.67     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 202307 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 306 PM PST Thu Feb 20 2020

SYNOPSIS. Varying degrees of high pressure over the Pacific Northwest will bring cool nights, mild days, and mainly dry weather through next week. The main exception to this will be on Sunday into Monday when a storm system will bring the return of valley rain and mountain snow.

SHORT TERM. Tonight through Sunday . Water vapor satellite imagery continues to show a closed upper level low dropping southward off the California coast, with shortwave ridging over the Pacific Northwest. Aside from some mid and high clouds streaming over the region this afternoon conditions remain rather mild. Expect these conditions to generally continue through Saturday. The exception to this will be the increase of marine clouds along the coast starting Friday as onshore flow takes over ahead of an incoming shortwave disturbance.

Guidance continues to show a weak front brushing by the far northern portions of the forecast area on Saturday which could bring some light rain to areas north of the Columbia River. A much stronger front looks to then move across the forecast area late Saturday into Sunday. This front will bring the return of widespread valley rain and mountain snow on Sunday, with snow levels lowering below Cascades Passes. There is still some uncertainty with QPF and snow amounts over the weekend, but based on the latest guidance it still looks like advisory level snow is possible over the North Oregon and South Washington Cascades. /64/Neuman

LONG TERM. Sunday night through Wednesday . Models and their ensembles are in good agreement the shortwave trough impacting the Pacific Northwest on Sunday will slide eastward and be replaced by shortwave ridging. This will result in decreasing showers and clouds across the area Sunday night into Monday. There is strong consensus the Pacific Northwest will then be under the influence of a shortwave ridge for much of next week. This will bring cool nights, high temperatures near average and mainly dry weather. Various operational and ensemble members do suggest a shortwave trough will try to slide into the ridge towards the middle of next week and potentially bring light precipitation to the area. However, there's very little consensus on how this might take shape and when exactly it will occur among model and ensemble guidance. As a result, the NBM slight chance PoPs towards the end of the long term forecast seem reasonable given the pattern and uncertainty. /Neuman

AVIATION. High pressure persists creating VFR conditions through Fri. Gusty east winds continue through the Gorge and Coast Range through 00Z Fri when the pressure gradient weakens. Winds will generally become light and variable through the valley after 08Z Fri. Slight chance of patchy fog around sunrise at 13Z Fri, but with a dry boundary layer, chances are low. If it does form, it would be near KEUG and other fog prone areas.

KPDX AND APPROACHES . VFR conditions with gusty east winds. Strong east winds around 2000 ft AGL will persist through 06Z Fri. Potential for some patchy fog around the airport in the early morning Fri, but unlikely due to winds through the evening. Not included in TAF. -Muessle

MARINE. High pressure remains over the area with a westerly swell through Sat morning. Seas around 5 ft will persist through Sat evening with winds generally calm. Sat night, a 990 mb low off the Alaska Peninsula will move south towards the CONUS Pacific Northwest. While the low will stay north of the area over the AK-PEN, winds and seas are expected to ramp up.

The main portion of this system will move over the waters Sun afternoon. With a strong gradient, small craft level winds with strong southerly gusts up to 30 kt are likely. Seas will also build to near 10 ft Sat afternoon, rising to near 16 ft Sun afternoon. With this system, there is still quite a bit of uncertainty due to model differences with the intensity of the low (how deep it is), and where it will track. In any case, a more active pattern is expected this weekend. By Mon night, conditions should settle and weak high pressure will develop over the Pacific creating calm conditions once again. -Muessle

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . None.



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This discussion is for Northwest oregon and Southwest Washington from the Cascade crest to 60 nm offshore. This area is commonly referred to as the forecast area.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 37 mi57 min 42°F1022.6 hPa (-1.0)
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 66 mi57 min 48°F1023 hPa (-0.0)
ASTO3 - 9439040 - Astoria, OR 71 mi57 min N 4.1 G 6 58°F 43°F1021.7 hPa (-0.6)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA1 mi64 minSE 1310.00 miFair53°F28°F38%1023 hPa
Portland, Portland International Airport, OR4 mi64 minSE 1110.00 miPartly Cloudy53°F28°F38%1023.2 hPa
Scappoose Industrial Airpark, OR14 mi64 minS 710.00 miFair55°F28°F36%1022.9 hPa
Portland, Portland-Troutdale Airport, OR15 mi64 minE 1410.00 miFair51°F27°F39%1023.4 hPa
Portland-Hillsboro Airport, OR16 mi64 minESE 610.00 miFair56°F28°F34%1023.1 hPa

Link to 5 minute data for KVUO

Wind History from VUO (wind in knots)
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Last 24hrE18
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5455CalmSW4Calm--3SE13
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1 day agoE10E8E10E10E9SE9SE7E5SE6E7CalmW44544SE11
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2 days agoSW86--64Calm--3--Calm--NW6356NE3345W76E12E10E10
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Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Kelley Point, Oregon - IGNORE HEIGHTS
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (19,4,5,8)
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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 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.