Thursday, November15, 2018 L-36.com


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 7:09AMSunset 4:41PM Thursday November 15, 2018 1:38 PM PST (21:38 UTC) Moonrise 1:33PMMoonset 11:50PM Illumination 54% Phase: First Quarter Moon; Moon at 8 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- 300 Am Pst Thu Nov 15 2018
.small craft advisory for rough columbia river bar in effect from 8 am this morning to 1 pm pst this afternoon...
.small craft advisory for rough columbia river bar in effect from this afternoon through this evening...
In the main channel.. * general seas...around 9 ft day then 7 ft later tonight into Friday. * first ebb...around 1030 am Thursday. Seas near 10 ft. * second ebb...around 1030 pm Thursday. Seas near 11 ft * third ebb...around 1130 am Friday. Seas near 10 ft.
PZZ200 300 Am Pst Thu Nov 15 2018
Synopsis for the southern washington and northern oregon coast.. High pressure will strengthen over the pac nw Fri, then shift east of the cascades Fri night and Sat, allowing increasing offshore flow for the weekend.


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 151818 aab
afdpqr
area forecast discussion... Updated
national weather service portland or
1015 am pst Thu nov 15 2018
updated aviation

Synopsis Today will be mostly dry and cloudy with northwest flow.

A weak disturbance moving near the area may produce light rain for sw
washington tonight and Friday. Dry weather expected Friday night
through early next week as strong high pressure returns to the area.

East winds will develop Friday night and result in mostly sunny but
cool weather this weekend. Rain is possible mid next week.

Short term Updated... Today through Saturday... Quick update sent
out to account for fog coverage this morning. Metars and various
webcams indicate spots of dense fog. Issued a nowcast earlier for the
south willamette valley as keug was at 1 4 mile vis. Fog will
gradually diminish through the morning, but still expect locally
dense conditions through at least 18z. A building upper level ridge
will keep rain well north of the area today, but a shortwave upper
level trough riding over the ridge may bring periods of light rain to
extreme SW washington tonight through Friday afternoon. The upper
ridge strengthens Friday evening and n-ne winds develop. Mixing at
the lower levels will be poor, especially on Friday and the stagnant
air may compromise the air quality.

East winds increase Saturday morning as models forecast the dalles to
troutdale surface pressure gradient of 7 to 9 mb by 8 am.These winds
will dominate through Sunday limiting fog and low clouds at night,
and supporting dry weather with mostly sunny skies and cool breezes.

Wind gusts of 30 to 35 mph are possible for the east portland metro
area and 65 to 75 mph gusts at crown point. The east winds should
help improve air quality near the cascade gaps and the columbia river
gorge, but poor air quality is likely in areas protected from the
east winds. ~tj

Long term No changes. Previous discussion follows... Saturday night
through Wednesday. The strong upper level ridge over the eastern
pacific shifts inland over the pacific northwest. East winds will
likely persist through the columbia river gorge for the start of next
week, but elsewhere winds will remain rather light which could lead
to stagnant conditions under the developing inversion. This pattern
will remain in place through at least early Tuesday until the next
front arrives, but forecast models diverge more significantly by
midweek. In particular, the deterministic ECMWF is about 24 hours
faster with the next frontal system, bringing it into the region
early Tuesday. Trended the forecast towards the nbm, which better
reflects the timing in the GFS and ensemble mean solutions. This
brings the highest (likely category) pops into the region early
Wednesday. Cullen

Aviation Ifr conditions prevail for the valleys of NW oregon
and SW washington, as high pressure strengthens overhead and
moisture remains locked in under fairly shallow inversions. Local
lifr fog exists within the broader area of ifr. Fog has also
spilled down the river valleys to the coast, occasionally
affecting kast and konp, while the remainder of the coast is
mostlyVFR. With strong inversions in place and little flow to
speak of, clouds will be slow to lift today. However, with
inversions rather shallow, there is a decent chance that most
terminals will break intoVFR conditions by late afternoon.

Valley fog will redevelop tonight as high pressure and light wind
continue across the region.

Pdx and approaches... Ifr CIGS vsbys persist at kpdx this
morning, and will slowly lift to MVFR by 22z. Decent chance
(roughly 40 percent) of breaking intoVFR conditions 22z-05z,
then fog and low clouds should redevelop with ifr lifr likely
later tonight Fri morning. Weagle

Marine A ridge of high pressure will lay over the waters into
Friday, then high pressure will strengthen inland for increasing
n-ne flow through the weekend. Some localized gusts 25-30 kt
will be possible in the offshore flow over the weekend, mainly
below gaps in the coastal terrain. Mh
seas around 10 ft will spread across the waters this morning and
is expected to subside below 10 ft this evening. The incoming
west swell is likely to lead to rough columbia river bar
conditions during the ebbs today and tonight.

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for hazardous seas until 8 pm pst this
evening for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for rough columbia river bar until 1 pm
pst this afternoon.

Small craft advisory for rough columbia river bar from 5 pm
this afternoon to midnight pst tonight.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 42 mi39 min 50°F1026.5 hPa (-1.7)
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 66 mi39 min 52°F1026.1 hPa (-1.6)
ASTO3 - 9439040 - Astoria, OR 74 mi39 min N 2.9 G 2.9 50°F 52°F1026.3 hPa (-1.4)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pearson Airfield, WA6 mi46 minWSW 610.00 miA Few Clouds52°F45°F77%1026.3 hPa
Portland, Portland International Airport, OR7 mi46 minN 010.00 miPartly Cloudy53°F45°F74%1026.4 hPa
Portland-Hillsboro Airport, OR14 mi46 minW 410.00 miPartly Cloudy55°F46°F72%1026.1 hPa
Portland, Portland-Troutdale Airport, OR15 mi46 minN 07.00 miOvercast48°F45°F89%1026.5 hPa
Scappoose Industrial Airpark, OR19 mi46 minN 010.00 miA Few Clouds55°F46°F72%1026.2 hPa
Aurora State Airport, OR20 mi46 minN 010.00 miPartly Cloudy55°F46°F72%1026.1 hPa

Wind History from VUO (wind in knots)
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Last 24hrN6NE3SE4E4CalmCalmCalmCalmCalmCalmNW4W3CalmCalmCalmCalmCalmCalmCalmN3CalmCalmCalmW6
1 day ago6SE7SE4SE73SE7CalmCalmCalmCalmCalmCalmSE6CalmE3E5SE4SE5SE8E6E9SE5CalmCalm
2 days agoSE8SE7SE8SE8SE4SE5SE7SE7SE6SE5SE7SE8SE7SE3E6SE4SE7SE10CalmSE6SE4SE5E9SE6

Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
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Thu -- 03:51 AM PST     0.59 feet Low Tide
Thu -- 05:13 AM PST     0.64 feet High Tide
Thu -- 06:54 AM PST     First Quarter
Thu -- 07:10 AM PST     Sunrise
Thu -- 08:22 AM PST     0.19 feet Low Tide
Thu -- 12:42 PM PST     1.37 feet High Tide
Thu -- 01:32 PM PST     Moonrise
Thu -- 03:36 PM PST     1.04 feet Low Tide
Thu -- 04:39 PM PST     Sunset
Thu -- 05:46 PM PST     1.19 feet High Tide
Thu -- 08:53 PM PST     0.72 feet Low Tide
Thu -- 11:50 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.30.90.70.60.60.60.40.20.30.611.31.41.21.111.11.210.80.70.91.2

Tide / Current Tables for Tillamook, Hoquarten Slough, Oregon
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Tillamook
Click for Map
Thu -- 02:01 AM PST     0.62 feet Low Tide
Thu -- 06:54 AM PST     First Quarter
Thu -- 07:14 AM PST     Sunrise
Thu -- 07:54 AM PST     5.34 feet High Tide
Thu -- 01:37 PM PST     Moonrise
Thu -- 02:54 PM PST     2.16 feet Low Tide
Thu -- 04:45 PM PST     Sunset
Thu -- 06:38 PM PST     4.90 feet High Tide
Thu -- 11:55 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.30.80.60.91.93.14.35.15.35.14.643.32.72.32.22.73.84.74.94.74.23.62.8

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (16,3,4,5)
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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.