Friday, August7, 2020
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Marine Weather and Tides
St. Helens, 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 6:00AMSunset 8:32PM Friday August 7, 2020 11:05 AM PDT (18:05 UTC) Moonrise 9:47PMMoonset 9:03AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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- 202 Am Pdt Fri Aug 7 2020
In the main channel.. - general seas...3 to 4 ft through Saturday. - first ebb...around 745 am Friday. Seas to 6 ft. - second ebb...around 815 pm Friday. Seas to 6 ft. - third ebb...around 815 am Saturday. Seas to 7 ft.
PZZ200 202 Am Pdt Fri Aug 7 2020
Synopsis for the southern washington and northern oregon coast.. A weak front will brush by the northern waters today. Otherwise, high pressure will rebuild 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 St. Helens, OR
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location: 45.87, -122.8     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 071647 AAA AFDPQR

Area Forecast Discussion . Updated National Weather Service Portland OR 946 AM PDT Fri Aug 7 2020

Updated Aviation Discussion

SYNOPSIS. Weather more representative of September for next day or two, with mild temperatures. Another weak front will push into western Washington early Saturday. But, rain stays well north of our area. Then, high pressure will build, with another warming trend for Sunday into early next week. Temperatures cool a bit again for rest of next week, with mostly dry conditions.

SHORT TERM. Today through Sunday . Onshore flow across the region continues today. Starting out with areas of clouds jammed against the Cascades, as well as the west side of the Coast Range and Willapa Hills. Overall, not a lot of change, as will see these clouds gradually break up this morning. Will see clouds across the interior lowlands, mainly north of Salem this am. Overall, rather pleasant day, with partly to mostly sunny skies, and temperatures only in the 70s for the interior, and 60s on the coast.

Next system will be approaching the Pac NW later tonight, with increasing clouds. Models have been suggesting that most of the precipitation with this system will be north of our area, primarily across northwest Washington and northward. Will trend towards that blend, but will keep a minor chance (20 pct) of showers for the coastal areas and coast mtns north of Tillamook for late tonight into Sat am. Even so, will see clouds farther inland, mainly north.

Skies again will gradually clear Sat afternoon, as lower to mid-level flow turns more northerly. Temperatures only a few deg warmer inland, with highs closer to 80 in the afternoon.

High pressure over the region builds through Sunday, with much warmer conditions for Sunday with mostly clear skies. Interestingly, the northerly pressure gradient will strengthen, thank to the building thermal low pressure over southwest Oregon. This will promote locally breezy conditions in the afternoon, with north winds 10 to 15 mph for many spots. This dry flow, combined with little if any residual marine layer and 500 mb heights pushing 590 dam, would expect high temps close to 90 deg for interior lowlands. /Rockey

LONG TERM. Monday through Thursday . As mentioned above, low amplitude upper ridging appears likely to build over Oregon and possibly Washington by Monday, leading to above normal temperatures inland. After Monday longer range models' solutions begin to differ, but the majority solution appears to favor some sort of upper trough development over the Pac NW by midweek. Again, models vary considerably on the strength of this upper trough and whether or not it will be strong enough to bring us rain, so we held close to the NBM solution which generally keeps our CWA dry. After a warm day Monday, temperatures should cool back closer to seasonal norms or perhaps slightly below that by midweek. /Weagle

AVIATION. Conditions remain predominately VFR as the air mass continues to stabilize today as high pressure builds in across the area. There remains some residual surface moisture, which is resulting in localized MVFR cigs around KAST and along the Columbia River. These MVFR cigs are expected to dissipate by 19Z Friday. After 19Z Friday expect mainly VFR with mostly clear skies through the evening.

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

MARINE. A weak front will brush by the northern waters today. Otherwise, high pressure will build 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 over the weekend with gusts to 30 kt possible south of Cascade Head and steep seas around 7-9 ft. Northerly winds continue through much of the upcoming week with occasional advisory gusts to 25 kt and seas around 5-7 ft. /64

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

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



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 18 mi47 min 72°F1022.8 hPa
ASTO3 - 9439040 - Astoria, OR 56 mi47 min WSW 6 G 6 62°F 70°F1022.5 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 63 mi47 min 60°F1023.2 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scappoose Industrial Airpark, OR8 mi72 minVar 410.00 miMostly Cloudy64°F54°F70%1022.2 hPa
Southwest Washington Regional Airport, WA18 mi69 minN 010.00 miFair63°F54°F73%1023.3 hPa
Pearson Airfield, WA19 mi72 minVar 510.00 miOvercast63°F52°F68%1022.6 hPa
Portland, Portland International Airport, OR21 mi72 minVar 410.00 miPartly Cloudy63°F53°F70%1022.7 hPa
Portland-Hillsboro Airport, OR24 mi72 minN 010.00 miFair62°F52°F70%1022.4 hPa

Link to 5 minute data for KSPB

Wind History from SPB (wind in knots)
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Last 24hrNW5W7NW7NW8NW7NW9
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NW6N3CalmNW3N7CalmCalmW3CalmW3CalmNW3Calm34SE6
1 day ago5Calm--6W4NW8
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NW6NW53CalmW3CalmCalmCalmCalmCalmS3SE4E3
2 days agoN6N10N10N10N8N9N8NW5NW8NW6NW5N5N5N5N5N6N5N4CalmCalmCalmS4Calm3

Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
Click for Map
Fri -- 05:59 AM PDT     0.34 feet Low Tide
Fri -- 06:02 AM PDT     Sunrise
Fri -- 10:03 AM PDT     Moonset
Fri -- 10:09 AM PDT     1.62 feet High Tide
Fri -- 06:19 PM PDT     -0.06 feet Low Tide
Fri -- 08:29 PM PDT     Sunset
Fri -- 10:46 PM PDT     Moonrise
Fri -- 10:53 PM PDT     1.50 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.2110.90.70.50.30.50.91.41.61.51.20.90.70.60.40.2-000.40.91.41.5

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Fri -- 04:37 AM PDT     7.28 feet High Tide
Fri -- 06:04 AM PDT     Sunrise
Fri -- 10:06 AM PDT     Moonset
Fri -- 11:45 AM PDT     -0.14 feet Low Tide
Fri -- 05:37 PM PDT     7.10 feet High Tide
Fri -- 08:34 PM PDT     Sunset
Fri -- 10:50 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.72.84.56.17.17.26.65.33.72.20.90.1-0.10.72.34.25.96.976.45.23.92.71.8

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 (14,3,4,5)
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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.