Sunday, August18, 2019 L-36.com


Marine Weather and Tides
Cannon Beach, OR

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 6:15AMSunset 8:17PM Sunday August 18, 2019 2:49 PM PDT (21:49 UTC) Moonrise 9:07PMMoonset 8:16AM Illumination 89% 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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PZZ250 Coastal Waters From Cape Shoalwater Wa To Cascade Head Or Out 10 Nm- Waters From Cape Shoalwater Wa To Cascade Head Or From 10 To 60 Nm- 237 Pm Pdt Sun Aug 18 2019
Tonight..NW wind 5 kt. Wind waves nw 1 ft at 4 seconds. W swell 4 ft at 14 seconds.
Mon..NW wind to 5 kt. Wind waves nw 1 ft at 4 seconds. W swell 6 ft at 11 seconds.
Mon night..N wind 5 to 10 kt. Wind waves N 2 ft at 4 seconds. W swell 5 ft at 9 seconds.
Tue..S wind 5 kt, rising to 15 kt with gusts to 20 kt in the afternoon. Wind waves S 2 ft at 5 seconds. W swell 4 ft at 11 seconds.
Tue night..S wind 15 to 20 kt. Gusts to 25 kt after midnight. Wind waves S 4 ft at 6 seconds. W swell 4 ft at 14 seconds.
Wed..SW wind 15 to 20 kt with gusts to 25 kt. Wind waves 5 ft. W swell 8 ft. Rain likely.
Wed night..NW wind 5 to 10 kt with gusts to 15 kt. Wind waves 3 ft. W swell 9 ft.
Thu..N wind 10 to 15 kt. Wind waves 3 ft. NW swell 8 ft.
Fri..NW wind 5 to 10 kt. Wind waves 3 ft. NW swell 5 ft.
PZZ200 237 Pm Pdt Sun Aug 18 2019
Synopsis for the southern washington and northern oregon coast.. Weak ridge of high pressure will persist over the coastal waters through early Tuesday, then give way to an approaching frontal system later Tue night into Wed. This front will likely move onshore early Wed night, with some W to nw swell lingering into Thursday.


7 Day Forecast for Marine Location Near Cannon Beach, OR
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location: 45.83, -123.94     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 182120
afdpqr
area forecast discussion
national service portland or
220 pm pdt Sun aug 18 2019

Synopsis A warming trend through Tuesday will give way to a humid
day with a chance of rain on Wednesday. The remainder of the week
will be seasonable and dry, except for a small chance of
precipitation on the southwest washington and far northwest oregon
coast toward the weekend.

Short term Tonight through Wednesday... Overall the week appears
summer-like, with the exception of Wednesday when an abnormally moist
frontal system passes through the area. Monday and Tuesday begin with
a shortwave upper ridge traversing the pacnw. Still expect enough of
a marine boundary layer on Monday for areas of morning clouds,
particularly in the north. As the ridge axis passes early Tuesday,
temperatures peak under mainly clear skies and light winds. The
Wednesday system is meteorologically quite interesting. A shortwave
over the gulf of alaska phases with what was the mid pacific
blocking cutoff low, and per nwp models initiates surface
cyclogenesis around 40n 150w on Monday. This system taps into an
extremely moist airmass over the subtropical central pacific, and
establishes an impressive ivt plume atmospheric river directed
toward the southwest bc coast Tuesday. As the main upper trough and
surface low reach southeast ak northwest bc Wednesday morning, the
trailing shortwave and associated surface front move onshore over
wa or Wednesday evening. Given the very moist airmass along and
ahead of the front, a period of precipitation Wednesday afternoon
beginning along the north coast and spreading south and eastward
appears likely. Prior to the arrival of the precipitation, Wednesday
will be an abnormally humid day inland, with predicted pw over 1.5"
and surface dew points in the lower 60s. To put the storm-total
rainfall potential in perspective, this morning's 12z GEFS storm
total mean (max) at pdx and ast are 0.24" (0.76") and 0.71" (1.70"),
respectively. This looks to be a brief but notable precipitation
event for mid august. Bright

Long term Wednesday night through Monday... Operational models
look to be in overall agreement through the extended forecast
period. The gfs, ecwmf as well as the ensemble models have a healthy
trough reaching down into the pacific NW bringing along a fair
amount of precipitable water. Precipitation chances increase through
the midweek as a result of the trough passing through. This also
will keep temperatures on the slightly cooler side. Coastal areas
should continue to experience highs in the low 70s, with inland
locations experiencing highs in the upper 70s to lower 80s. Friday
models are showing a shortwave ridge starting to develop then
dominating the area through the start of the weekend. Saturday
afternoon has the possibility for some isolated showers near the
or wa border but the models do show a little uncertainty as to
where the trough axis will fall.

Something to focus on for the extended period specifically the
Wednesday through Thursday time frame, is that many GEFS members are
signaling a potential moderate atmospheric river (ar), based on
integrated vapor transport (ivt) values in excess of 500 kg ms
reaching as far south as the oregon coast. If this manifests expect
pops and QPF vales to be raised as confidence in the event
increases. 42

Aviation Low clouds are just now beginning to clear across the
pdx metro area, while MVFR CIGS persist along the coast ktmk
northward. ElsewhereVFR conditions prevail this afternoon. It's
appearing like a coin flip as to whether or not kast will break
intoVFR conditions before stratus begins to push back inland
this evening and overnight tonight. Model guidance continues to
suggest onshore flow and a fairly deep marine layer persisting
into Monday morning, so expect coastal low clouds to return to at
least northern portions of the willamette valley by sunrise.

Kpdx and approaches... As of 21z, stratus was gradually clearing
across the pdx metro area, andVFR will prevail for the remainder
of this afternoon. Clear skies expected most of this evening,
then low clouds return for Monday morning. Weagle

Marine Benign weather continues across the coastal waters
today, as high pressure offshore remains too weak to drive strong
n-nw winds. Seas remain in the 3 to 5 ft range, mainly from nw
swell. North to northwest winds are expected to stay at 15 kt or
less through Monday, so similar winds and seas as today.

Some changes begin Tuesday, with winds becoming s-se ahead of an
approaching frontal system. Some forecast models suggest this
front could be rather strong for august, potentially bringing
small craft advisory-level southerly winds up to 25 kt Tue night
or wed. The wind wave and swell associated with this system may
push seas up toward 10 feet Wed thu, with the best chance of 10
foot-plus seas being in our northern waters due to larger swells
and potentially stronger wind. weagle

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
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 19 mi55 min 56°F1013.4 hPa
46096 26 mi69 min N 7.8 G 7.8 61°F 61°F1013.3 hPa
46243 - Clatsop Spit, OR - 162 28 mi49 min 61°F4 ft
ASTO3 - 9439040 - Astoria, OR 28 mi49 min NNW 6 G 8.9 64°F 70°F1013 hPa (+0.4)
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 36 mi59 min N 5.8 G 7.8 62°F 65°F4 ft1013.7 hPa (+0.3)56°F
46248 - Astoria Canyon, OR (179) 43 mi49 min 63°F4 ft

Wind History for Garibaldi, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR23 mi2.9 hrsN 710.00 miLight Rain65°F55°F70%1013 hPa

Link to 5 minute data for KAST

Wind History from AST (wind in knots)
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Last 24hrW10W9W9SW7NW7W5W6W4W3W5--W3CalmCalmCalm--NW3NW7NW8NW8N7N7NW7NW7
1 day agoNW9NW6W8W7W6------NW6W5W6--W6W4W4--W3W5W5W83W7W6SW9
2 days ago----NW10NW10--NW8NW8N10--NW9--W4W5N5----W6NW7NW6W9NW9W11NW10W10

Tide / Current Tables for Nehalem, Nehalem River, Oregon
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Nehalem
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Sun -- 02:54 AM PDT     6.71 feet High Tide
Sun -- 06:19 AM PDT     Sunrise
Sun -- 09:16 AM PDT     Moonset
Sun -- 10:07 AM PDT     0.30 feet Low Tide
Sun -- 03:56 PM PDT     6.28 feet High Tide
Sun -- 08:18 PM PDT     Sunset
Sun -- 10:06 PM PDT     Moonrise
Sun -- 10:21 PM PDT     1.63 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.75.26.36.76.45.54.32.91.60.70.30.61.83.34.85.96.365.24.132.11.71.8

Tide / Current Tables for Brighton, Nehalem River, Oregon
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Brighton
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Sun -- 02:27 AM PDT     7.36 feet High Tide
Sun -- 06:19 AM PDT     Sunrise
Sun -- 09:05 AM PDT     0.40 feet Low Tide
Sun -- 09:16 AM PDT     Moonset
Sun -- 03:30 PM PDT     6.89 feet High Tide
Sun -- 08:18 PM PDT     Sunset
Sun -- 09:19 PM PDT     2.17 feet Low Tide
Sun -- 10:06 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.46.67.37.36.55.23.620.90.40.71.83.24.86.16.86.86.153.82.72.22.33.1

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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Wind Forecast for Portland, OR (17,4,5,8)
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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.