Saturday, August17, 2019 L-36.com


Marine Weather and Tides
Minnehaha, WA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:12AMSunset 8:17PM Saturday August 17, 2019 10:25 AM PDT (17:25 UTC) Moonrise 8:40PMMoonset 7:10AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 830 Am Pdt Sat Aug 17 2019
In the main channel.. - general seas...5 ft through Saturday night. - first ebb...around 7 pm Saturday. Seas building to 7 ft. - second ebb...around 7 am Sunday. Seas building to 7 ft. - third ebb...around 730 pm Sunday. Seas building to 6 ft.
PZZ200 830 Am Pdt Sat Aug 17 2019
Synopsis for the southern washington and northern oregon coast.. High pressure remains in place well offshore with thermal low pressure near southwestern oregon. Little chance to the pattern for the next few days. High pressure shifts inland early next week, with a front reaching the coastal waters around Wednesday.


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 171632
afdpqr
area forecast discussion
national service portland or
930 am pdt Sat aug 17 2019

Synopsis After a partly to mostly cloudy day today, look for a
gradual increase in temperatures and a decrease in morning clouds
through Tuesday. Temperatures peak on Tuesday before cooling during
the latter half of next week, with the small chance of some light
showers mainly Wednesday night.

Short term Today through Tuesday... Large blocking pattern over the
pacific around 165w continues to place the pacific northwest under
deep northwesterly flow. A weak shortwave trough passage through
southern bc early this morning created a decent marine push, and even
brought some light precipitation over southwest washington and the
far northern parts of western oregon. Satellite trends show some
breaks in the overcast in the north, and the southern cloud edge
between corvallis and eugene is now beginning to dissipate westward.

Based on these trends and the latest hrrr forecast, expecting a
gradually partly to mostly sunny transition moving into the
afternoon. Temperatures will be relatively cool today, topping out
several degrees below average for the date. Forecast looks good with
no updates, and no changes to the remainder of the discussion. Bright
a weak shortwave trough will hang over the pacific northwest Sunday
and Monday, which should allow temperatures to warm across the
region, but only gradually. This appears likely to change as we head
into Tuesday when models are in good agreement shortwave ridging
will build northward across the rocky mountain states. This should
result in high temperatures climbing into the upper 80s or low 90s
across the willamette valley and columbia river gorge on Tuesday.

Neuman

Long term Tuesday night through Friday... Models remain in
agreement shortwave ridging over the rocky mountain states will slide
eastward midweek. This will open the door for a shortwave trough to
move into british columbia Tuesday night and Wednesday. The uncertain
part of the forecast is whether or not this upper level trough will
help a decaying, but moist front to move into the region. Between
timing differences and whether or not the front will hold together
enough to bring rain to the region, have kept slight chance to chance
pops in the forecast for the Wednesday & Wednesday night time
periods. Thereafter, zonal flow should keep temperatures in check
late next week. Neuman

Aviation Moderate to strong northwesterly onshore flow
continues, with a fairly widespread MVFR to lowVFR stratus deck
across the forecast area. Expect slow, gradual improvement toVFR
across much of the region by 19-20z, but scattering will likely
take until mid afternoon or so. Improvement will generally be
from south to north as the day progresses. Stratus likely returns
to nearly all of the forecast area tonight after 09z-12z.

Kpdx and approaches... Scattering lower MVFR deck with variable
mid high clouds passing above. Overall, expect ceiling to
entirely scatter around 21z with a light northwest wind
prevailing this afternoon. MVFR stratus likely returns around 11z
tonight. Cullen

Marine High pressure remains in place well offshore as thermal
low pressure persists over northwestern california and
southwestern oregon. Some gusts around 20 kt over the outer
waters (beyond 35-40 nm from shore), but otherwise the surface
pressure gradient isn't particularly strong and will maintain
winds closer to 15 kt over most of the waters. Meanwhile, seas
holding at 6 to 8 feet, with a mix of a larger 8 second and
smaller 15 second swell. Largest and steepest seas align with
the area of strongest winds.

Little change into next week, though winds will increase a
bit each afternoon evening south of newport as the gradient
increases. A front will move near the waters early next week,
bringing stronger south winds to the waters by around Wednesday.

Cullen

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 37 mi62 min 72°F1016.8 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 66 mi62 min 62°F1017.6 hPa
ASTO3 - 9439040 - Astoria, OR 71 mi56 min WNW 1.9 G 6 63°F 69°F1016.5 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA1 mi33 minVar 410.00 miOvercast65°F54°F68%1016.7 hPa
Portland, Portland International Airport, OR4 mi33 minWNW 410.00 miMostly Cloudy65°F53°F66%1016.8 hPa
Scappoose Industrial Airpark, OR14 mi33 minVar 310.00 miOvercast66°F54°F65%1016.6 hPa
Portland, Portland-Troutdale Airport, OR15 mi33 minN 010.00 miOvercast64°F55°F73%1016.8 hPa
Portland-Hillsboro Airport, OR16 mi33 minVar 410.00 miOvercast66°F52°F61%1016.6 hPa

Link to 5 minute data for KVUO

Wind History from VUO (wind in knots)
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Last 24hrCalm4--SW44N7
G16
NW9--NW9
G18
NW8--NW5--NW4Calm--CalmNE3E3--CalmCalmW54
1 day agoNW33W3SW5--W7W95--6NW7NW8N5------NW3NW3------3CalmE3
2 days agoW6SW764W45NW6NW7
G14
NW10N7NW7NW4NW5NW5NW6NW3NW3N3CalmCalmCalmCalmN54

Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
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Sat -- 04:39 AM PDT     0.31 feet Low Tide
Sat -- 06:13 AM PDT     Sunrise
Sat -- 08:11 AM PDT     Moonset
Sat -- 08:51 AM PDT     1.67 feet High Tide
Sat -- 05:04 PM PDT     -0.17 feet Low Tide
Sat -- 08:15 PM PDT     Sunset
Sat -- 09:38 PM PDT     1.45 feet High Tide
Sat -- 09:39 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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110.90.70.40.30.61.11.51.71.51.10.80.70.60.30-0.2-00.511.41.41.2

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Sat -- 03:22 AM PDT     7.57 feet High Tide
Sat -- 06:15 AM PDT     Sunrise
Sat -- 08:13 AM PDT     Moonset
Sat -- 10:36 AM PDT     -0.42 feet Low Tide
Sat -- 04:24 PM PDT     7.04 feet High Tide
Sat -- 08:20 PM PDT     Sunset
Sat -- 09:43 PM PDT     Moonrise
Sat -- 10:45 PM PDT     1.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.35.16.67.57.46.55.13.41.80.5-0.3-0.30.62.44.466.96.96.14.83.52.31.61.4

Weather Map and Satellite Images
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wmap_P
GOES 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 (13,3,4,5)
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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 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.