Friday, August7, 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 6:00AMSunset 8:31PM Friday August 7, 2020 5:39 PM PDT (00:39 UTC) Moonrise 9:47PMMoonset 9:03AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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- 236 Pm Pdt Fri Aug 7 2020
In the main channel.. - general seas...3 to 5 ft through Saturday. - first ebb...around 815 pm Friday. Seas to 6 ft. - second ebb...around 815 am Saturday. Seas to 7 ft. - third ebb...around 900 pm Saturday. Seas to 7 ft.
PZZ200 236 Pm Pdt Fri Aug 7 2020
Synopsis for the southern washington and northern oregon coast.. High pressure rebuilds across the waters through early next week with thermal low pressure over the far south oregon coast. This will result in periods of gusty northerly winds and steep seas through much of the upcoming week.


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 072127 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 230 PM PDT Fri Aug 7 2020

SYNOPSIS. The weather is likely to remain rather benign over the next few days as a high pressure system offshore keeps a northwest onshore flow. Expect mostly dry weather into early next week with temperatures warming some Sunday and Monday.

SHORT TERM. Tonight through Monday . A weak shortwave seen in water vapor pictures dropping southeast off the coast of Vancouver Island Friday afternoon is expected to push a weak cold front into the region overnight. Model time height cross sections show mainly just a rather narrow band of shallow moisture arriving with this system late tonight, so will limit pops to a slight chance of showers overnight for the north coastal areas. Otherwise the resulting onshore flow should be enough to return area of clouds to the coast and northern interior late tonight and Saturday morning, with little change in high temperatures expected between Friday and Saturday.

Saturday night through Sunday night models are consistent in showing the upper heights rising some, while low level flow turns more northerly due to resurgence of a thermally induced trough of low pressure along the south Oregon coast. This will result in a decrease in the amount of diurnal cloudiness and warming temperatures. Although the upper heights begin to come back down again by Monday, 850 mb temperatures continue to warm, suggesting Monday is likely to be the warmest day of the coming week. With 850 mb temperatures expected to peak around 18C Monday, could see some inland valley high temperatures reaching near 90F.

LONG TERM. Monday night through Friday . Models are in general agreement showing the more or less zonal flow early next week, evolving into a trough over the region, before shifting east of the Cascades at the end of the week. While the ultimate depth of the trough is not well agreed upon, there is enough uncertainty in the strength to include a small chance of showers over parts of southwest Washington Wednesday and Thursday. Otherwise expect temperatures to run a little below normal through the middle and latter parts of the week.

AVIATION. Conditions remain predominately VFR as the air mass continues to stabilize as high pressure builds in across the area. Predominately VFR across the area with mostly clear skies through Saturday. The only exception will be along the coast this evening as onshore flow will persist. Expect MVFR cigs to develop near KAST after 07Z Saturday along with a slight chance for showers. KONP has the potential for MVFR cigs to develop around the same time but, confidence is low at this time. After 16Z Saturday look for VFR conditions to return along the coast and persist across the area through Saturday.

KPDX and APPROACHES . Predominately VFR with mostly clear skies through Saturday. /42

MARINE. High pressure will build across the waters through early next week with thermal low pressure over the far south Oregon coast. North winds 15 to 25 kt with gusts up to 30 kt and seas 7 to 10 feet at 12 seconds. Highest gusts of 30 kt possible south of Cascade Head. Gusty northerly winds and steep seas will continue through much of the upcoming week, therefore have issued a small craft advisory for winds and seas starting Saturday for all waters. /42

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory from 11 AM Saturday to 11 PM PDT Sunday for coastal waters from Cape Shoalwater WA 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 37 mi52 min 71°F1020.3 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 66 mi52 min 55°F1022 hPa
ASTO3 - 9439040 - Astoria, OR 71 mi52 min WSW 12 G 14 65°F 70°F1021.7 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA1 mi47 minWNW 710.00 miFair78°F50°F37%1019.6 hPa
Portland, Portland International Airport, OR4 mi47 minN 510.00 miA Few Clouds78°F51°F39%1019.7 hPa
Scappoose Industrial Airpark, OR14 mi47 minN 1010.00 miFair78°F50°F37%1019.4 hPa
Portland, Portland-Troutdale Airport, OR15 mi47 minVar 610.00 miFair78°F46°F32%1019.4 hPa
Portland-Hillsboro Airport, OR16 mi47 minNE 710.00 miA Few Clouds77°F52°F42%1019.5 hPa

Link to 5 minute data for KVUO

Wind History from VUO (wind in knots)
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Last 24hrNW8
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NW10NW8NW7NW6CalmCalmCalmNW3CalmCalmCalmCalmCalmSE5SE553W5--3NW76NW7
1 day agoN8N8NW8
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N55N6NW5CalmCalmCalm3E5SE5Calm4S4W3CalmNW6W3N3NW10
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2 days agoNW9NW12
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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 (20,4,5,8)
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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.