Sunday, May26, 2019

Marine Weather and Tides
Portland, OR

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 5:27AMSunset 8:48PM Sunday May 26, 2019 8:18 PM PDT (03:18 UTC) Moonrise 1:16AMMoonset 11:40AM Illumination 43% Phase: Third Quarter Moon; Moon at 23 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- 220 Pm Pdt Sun May 26 2019
In the main channel.. - general seas...5 feet through Sunday night, then 4 feet Monday. - first ebb...around 1215 am Monday. Seas building to 6 feet. - second ebb...around 1215 pm Monday. Seas building to 5 feet. - third ebb...around 115 am Tuesday. Seas building to 5 feet.
PZZ200 220 Pm Pdt Sun May 26 2019
Synopsis for the southern washington and northern oregon coast.. High pressure will develop across the coastal waters today and continue through at least midweek. Meanwhile, thermal low pressure will develop over the northern california and southern oregon coast Tuesday and Wednesday.

7 Day Forecast for Marine Location Near Portland, OR
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location: 45.53, -122.68     debug

Area Discussion for - Portland, OR
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Fxus66 kpqr 262139
area forecast discussion
weather service portland or
239 pm pdt Sun may 26 2019

Synopsis Low pressure over central california today is resulting
in a threat for showers and possibly a few thunderstorms this
afternoon and evening. The low will eject into the southwest u.S.

Tonight and then into the intermountain west tomorrow. There will be
a chance for more wrap-around showers and thunderstorms tomorrow
afternoon and evening. Going through the middle part of the week,
there is only a slight chance for showers over cascades, otherwise
dry weather is expected with seasonably mild temperatures thanks to
onshore flow.

Short term Tonight through Wednesday... A closed upper level low
pressure system is located over the central valley of california
today. This is resulting in some wrap-around moisture and instability
rotating into the pac nw. We are starting to see some developing over
the south washington and north oregon cascades on radar over the past
couple of hours. There has been quite a bit of cloud cover across the
region so far today, which has tempered the expectations for
thunderstorms over the cascades a bit, which also limits the
threat for the interior lowlands. However, confidence is certainly
not high enough to pull thunder from the forecast at this
point. There has been also been a lot of sunshine over the coast
range today. Think this may actually end up being the most likely
spot for thunder at this point. Visible satellite shows cumulus
buildups occurring over the north oregon coast range, and we will be
watching this closely for vertical development over the next few
hours. Any showers any thunderstorms that do develop later this
afternoon and early evening should weaken later this evening. There
will likely be a few weak showers lingering in the cascades tonight.

The upper level low will move into the southwest u.S. Tonight, then
eject east into the intermountain west on mon. For the past couple of
days, Mon has been looking a little less favorable for convection
than today in the models. However, the things are now looking a
little more favorable for mon. There is a bit more of an easterly
component to the mid-level flow in the models today, which increases
the likelihood of some storms developing in the cascades and
foothills. Another interesting development is that a few of the
hi-res models are showing some showers and possibly thunderstorms
popping up along the east slopes of the coast range and western
portions of the willamette valley, potentially in response to a bit
of a marine front as onshore flow increases again. This setup looks
very similar to a day we had last week, where showers drifting west
from the cascade foothills met eastward moving showers from the coast
range. We saw some enhanced shower activity in this convergence area
last week, but no thunderstorms. Instability looks to be a little
more impressive this time, as it looks like the east slopes of the
coast range and western portions of the valley may see quite a bit of
sun tomorrow morning and early afternoon. Decided to extend a slight
chance of thunder out through the northern willamette valley and i-5
corridor in cowlitz county all the way to the coast range and willapa
hills tomorrow afternoon. Otherwise, expect tomorrow to be pretty
similar to today. Inland highs should again reach into the low to mid
70s. It does appear that some southerly winds develop along the coast
tomorrow, bringing increasing low clouds and cooler temps to the
coast. There are some indications that cooler air and morning clouds
may reach the south willamette valley Mon morning.

By tue, the upper level will be heading into the central u.S. A ne
pac ridge will bring increasing heights over the pac nw. There will
be little change to the pattern on wed. Onshore flow at the surface
will keeps temps comfortable, near or just above seasonal normals on
both days. The models also show some instability near the cascade
crest during this time. A slight chance of thunder has been included
near the crest during the afternoon and evening hours both days. Pyle

Long term Wednesday night through Sunday... Ridge of high pressure
to our north midweek keeps dry, mild weather in place. We may see a
stray shower or thunderstorm near the crest of the lane county
cascades Wednesday night, or a few showers in the oregon cascades on
Thursday as we get clipped by shortwaves passing mostly to our
south. Weak onshore flow will keep temperatures fairly close to
normal for this time of year. Next weekend should start out dry and
mild as high pressure sits over the area. Sunday, a shortwave trough
moves through which will increase cloud cover and may trigger a few
showers, mostly along the coast, coast range, and in the cascades.


Aviation Vfr conditions across most of the area this afternoon
as low clouds continue to scatter, but MVFR CIGS do remain in the
far southern parts of the willamette valley (around keug).

Meanwhile, some showers are developing over the wa and N or
cascades, and these may continue to drift into parts of portland
metro area this afternoon and evening. Otherwise, expect a return
of low clouds to the coastal areas and southern half of the
interior lowlands tonight. Guidance indicates that clouds may
build up along the cascades foothills and perhaps into the
portland metro terminals, but confidence is low to moderate in
this scenario.

Kpdx and approaches...VFR conditions this afternoon. Some showers
or possibly a thunderstorm may develop around the terminal
through around 04z, which could result in lightning and or brief
MVFR conditions. A lower MVFR cloud deck may develop south and east
of the terminal late overnight (after 13z) and could build back
into the terminal, but confidence in this remains moderate at
best. cullen

Marine Seas are holding at 6 to 8 feet across the coastal
waters this afternoon, but remain rather steep with dominant
periods around 9 seconds. Meanwhile, only a few localized gusts
to 20-25 kt across the far southern outer waters. Light winds and
smaller seas will then develop across the waters for the first
half of the week as high pressure develops over the waters. Gusts
in the afternoon hours on Tuesday and Wednesday may being to
approach 20 kt, however, as a thermal trough begins to build up
the southern portions of the oregon coast. Seas will remain 4 to
6 feet through at least midweek, but will be made up of 2-3
different swells, each around 3 feet. 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 42 mi37 min 57°F1010.5 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 66 mi37 min 53°F1012.3 hPa
ASTO3 - 9439040 - Astoria, OR 74 mi31 min SSW 6 G 9.9 1010.8 hPa

Wind History for Longview, WA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA6 mi26 minN 510.00 miOvercast69°F52°F55%1009.9 hPa
Portland, Portland International Airport, OR7 mi26 minNNE 710.00 miMostly Cloudy69°F51°F53%1009.8 hPa
Portland-Hillsboro Airport, OR14 mi26 minNNE 510.00 miFair69°F53°F57%1009.9 hPa
Portland, Portland-Troutdale Airport, OR15 mi26 minVar 310.00 miPartly Cloudy69°F53°F57%1009.7 hPa
Scappoose Industrial Airpark, OR19 mi26 minNNE 710.00 miOvercast69°F55°F63%1009.9 hPa
Aurora State Airport, OR20 mi26 minSSW 410.00 miThunderstorm in Vicinity67°F55°F66%1010.2 hPa

Wind History from PDX (wind in knots)
Last 24hrNW4NW6NW8NW4NW4N6N5N4N4N3N5N5CalmCalmCalmCalmNW63W7W10W7W6NE5NE7
1 day agoW4W5W3SW3S5S5S7S8SW9S5S5SW8S8SW9SW5SW6S7SW5S4S6NW4CalmW5NW5
2 days agoNW8N7NW6NW5NW3CalmCalmE3SE5S6S7S6S8S7S9S11SW9W9NW10NW10

Tide / Current Tables for Portland, Willamette River, Oregon - 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 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.

Weather Map and Satellite Images
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (23,6,7,8)
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Ground Weather Radar Station Portland, OR
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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 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 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.