Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Minnehaha, WA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:29AMSunset 8:45PM Thursday May 23, 2019 7:43 AM PDT (14:43 UTC) Moonrise 12:00AMMoonset 8:39AM Illumination 79% 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- 202 Am Pdt Thu May 23 2019
In the main channel.. - general seas...around 6 feet through Thursday. - first ebb...around 830 am Thursday. Seas to 8 ft with breakers possible. - second ebb...around 915 pm Thursday. Seas to 7 ft. - third ebb...around 915 am Friday. Seas to 7 ft.
PZZ200 202 Am Pdt Thu May 23 2019
Synopsis for the southern washington and northern oregon coast.. High pressure will reside over the waters through the weekend. A low pressure system will dive south through western washington Friday and then across central oregon Friday night.


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 230914
afdpqr
area forecast discussion
national weather service portland or
215 am pdt Thu may 23 2019

Synopsis A ridge of high pressyure off the coast will bring
warmer temepratures today, while low pressure to the east keeps a
chance for showers and thunderstorms, mainly for the cascades. On
Friday an upper level low pressure system will move down the british
columbia coast and over the pacific northwest, bringing cooler
temperatures and renewed chances for showers lasting through the
weekend.

Short term Today through Saturday... The upper low pver the
desert southwest early this morning is expected to lift north
through utah today and into wyoming tonight. Cascades remain on the
northwest periphery of the closed low today, leaving the area open
to a chance for showers and thunderstorms. Areas further west
however are likely to remain dry today and tonight as a ridge of
high pressure aloft offshore presses closer to the coast and raises
heights aloft. This also expected to result in warmer temperatures
for much of the area today as 850 mb temperatures climb several
degrees.

Models agree on a shortwave moving south down the british columbia
and washington coast Friday, digging in for a closed low sinking
south over the region Friday night. A surface trough of low pressure
trailing the low to the north, brings enhanced low level onshore
flow to the region Friday. This brings a chance for showers back to
the entire region, but pops will be a bit on the conservative side
generally chance category except over terrain in the north, as
moisture is limited to just the very low elevations. A second low
follows the first one down the coastline on Saturday, maintaining a
showery cool air mass for the area.

Long term Saturday night through Wednesday... No changes.

Previous discussion follows. The models agree on the general trend
throughout the extended. A low will slowly track over the forecast
area through Sunday leaving a wake of shortwaves that will keep
chances of precipitation within the forecast through Monday night.

The euro is leaning more towards the wetter side as its low has a
more organized circulation and stronger frontal formation, this
results in more rain. The forecast however, is leaning more towards
the GFS which still shows precipitation but not as heavy. Both
models show heavier precipitation in the cascades Monday night.

A high pressure moving in from off-shore Tuesday will reduce
precipitation for the rest of the extended. A notable feature will be
the inversions that occur Sunday through Tuesday in the early
morning hours (around 5am); this will increase temperatures above
1500ft by roughly 5 degrees. -bphillips

Aviation MVFR stratus beginning to develop inland will spread
through the rest of the inland sites through Thursday morning.

Coastal sites will drop to ifr through the night and likely not
improve above MVFR during the day Thursday. Inland site should
clear out Thursday afternoon but for some cirrus.

Kpdx and approaches... MVFR stratus returning and lasting through
about 18z or 19z Thursday, thenVFR. Light and variable winds
overnight, become northwest round 10 kt Thursday afternoon. Bowen

Marine Latest buoy obs show winds below 20 kt and they were
marginal earlier even at buoy 89, so have dropped current small
craft advisory for winds. However, it does look like winds will
pick up again out of the northwest behind the current system over
the waters beyond about 15 nm offshore, so added a new small
craft advisory for winds starting 5 pm pdt Thursday.

This northerly wind pattern continues through at the weekend.

It appears winds weaken over the weekend. Meanwhile, seas have
dropped some to 8 to 9 ft at 8 to 10 seconds. Have kept the small
craft advisory for hazardous seas in place as it, but will not
extend as seas will continue to drop a little bit with dominant
wave period remaining around 9 seconds.

Model guidance shows seas exceeding 10 ft again Friday night as
the next low pressure area along the british columbia coast drops
south. Latest spectral guidance has seas peaking around 14 ft in
the northern outer waters. Seas then fall just below 10 ft
Saturday and look to continue falling through Sunday to around 4
to 5 feet. Bowen

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for winds from 5 pm this afternoon to 5 am
pdt Friday for waters from CAPE shoalwater wa to florence
or from 10 to 60 nm.

Small craft advisory for hazardous seas until 11 am pdt this
morning 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 mi50 min 58°F1018 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 66 mi50 min 56°F1018 hPa
ASTO3 - 9439040 - Astoria, OR 71 mi44 min N 1.9 G 4.1 53°F 59°F1017.5 hPa (-0.6)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA1 mi51 minNW 610.00 miOvercast56°F51°F84%1017 hPa
Portland, Portland International Airport, OR4 mi51 minNNW 610.00 miOvercast57°F51°F81%1017 hPa
Scappoose Industrial Airpark, OR14 mi51 minN 710.00 miOvercast57°F51°F81%1017 hPa
Portland, Portland-Troutdale Airport, OR15 mi51 minN 010.00 miOvercast56°F53°F90%1016.9 hPa
Portland-Hillsboro Airport, OR16 mi51 minWNW 410.00 miOvercast53°F50°F89%1017 hPa

Wind History from VUO (wind in knots)
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Last 24hrN43E4SE4E6SE5SW46E4CalmNW5E8SE7SE6NW4N53CalmCalmCalm3N4NW3NW6
1 day agoCalmW3W5W6NW7NW6NW9NW65NW9
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NW5NW4NW3W4W3NW3NW5NW3CalmCalmCalmCalm3
2 days agoSE3CalmSE65SE4S5S4SE4E8E11E10E8E5N3CalmSW5CalmCalmCalmCalmE3CalmCalmCalm

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 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 (10,2,3,4)
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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.