Thursday, May25, 2017 L-36.com


Marine Weather and Tides
Cannon Beach, OR

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:28AMSunset 8:50PM Thursday May 25, 2017 9:04 AM PDT (16:04 UTC) Moonrise 4:55AMMoonset 7:49PM Illumination 0% Phase: New Moon; Moon at 0 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-coastal Waters From Cascade Head To Florence Or Out 10 Nm- 856 Am Pdt Thu May 25 2017
.small craft advisory for hazardous seas in effect until 3 pm pdt this afternoon...
Today..N wind 5 to 10 kt with gusts to 15 kt...rising to 10 to 15 kt with gusts to 20 kt in the afternoon. Wind waves N 3 ft at 4 seconds. NW swell 9 ft at 10 seconds.
Tonight..N wind 10 to 15 kt with gusts to 20 kt...easing to 5 to 10 kt with gusts to 15 kt after midnight. Wind waves N 3 ft at 4 seconds. NW swell 7 ft at 10 seconds.
Fri..N wind 5 to 10 kt...becoming nw 10 to 15 kt in the afternoon. Wind waves N 2 ft at 4 seconds. NW swell 6 ft at 9 seconds.
Fri night..N wind 10 to 15 kt...easing to 5 to 10 kt after midnight. Wind waves N 2 ft at 4 seconds. NW swell 6 ft at 9 seconds. Patchy fog.
Sat..NW wind to 5 kt...rising to 5 to 10 kt in the afternoon. Wind waves nw 1 ft at 4 seconds. NW swell 5 ft at 9 seconds. Patchy fog.
Sat night..NW wind 5 to 10 kt. Wind waves nw 2 ft at 4 seconds. NW swell 5 ft at 11 seconds.
Sun..NW wind 10 to 15 kt. Wind waves 2 ft. W swell 4 ft.
Mon..NW wind 10 to 15 kt. Wind waves 3 ft. W swell 4 ft.
PZZ200 856 Am Pdt Thu May 25 2017
Synopsis for southern washington and northern oregon coast.. High pres over the waters with low pres inland through early next week. A weather system is possible around the middle to latter part of next week.

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 250939
afdpqr
area forecast discussion
national weather service portland or
239 am pdt Thu may 25 2017

Synopsis An upper level trough will reside over the pacific
northwest through Thursday. There remains a slim threat of late day
thunderstorms Thursday over the higher north oregon and south
washington cascades. High pressure will return Friday for drier,
sunnier, and warmer weather. Warm and dry conditions continue through
the holiday weekend and early next week. There is a slim threat of
late-afternoon and evening thunderstorms over the higher cascades
Monday through Wednesday.

Short term Today through Saturday... A broad upper level trough
moved through the pac NW Wednesday and is now east of the rockies.

However, a shortwave on the backside of the trough is diving south
through the pac NW and will continue to influence our weather today.

Onshore flow continues this morning, although not nearly as strong as
we experienced yesterday. Satellite imagery shows scattered clouds
around the area with little pattern. Still think it's possible clouds
will backbuild from the cascade foothills into at least the northern
willamette valley this morning, but clouds should clear by late this
morning.

Although the main upper low will move east into the northern great
plains thu, the elongated trough axis on the backside of the low will
pinch off and hang back over the pac nw. The GFS shows channeled 500
mb vorticity through the interior valleys of washington and northern
oregon today in north flow aloft. The gfs, nam, and ECMWF all hint at
some light QPF this afternoon, primarily over the S washington
cascades and N oregon cascades. The GFS continues to have surface
based LI values of -2 to -3 c from around mt. Hood northward in the
afternoon, so left the slight chance of thunderstorms in the fcst
near the cascade crest. Models are in agreement with 850 mb temps
warming to around 9-10 deg c this afternoon, which is a little bit
warmer than previous runs, so warmed high temperatures a degree or
two. Models keep inland areas generally clear tonight into Friday
morning with some clouds along the coast. With an additional 3 to 5
deg c of warming at 850 mb Friday, expect temperatures to continue to
warm, likely into the 80s inland
models continue to suggest a south stratus surge up the coast
beginning Fri evening and continuing into Sat morning, which will
keep temperatures along the coast, particularly south of about
tillamook, cooler during the day Saturday. Outside of the stratus
surge, temperatures will warm another few degrees with the upper
ridge axis overhead, and potentially into the mid 80s in some inland
areas. Bowen

Long term Saturday night through Wednesday. The models are in
general agreement through about Mon or Mon night with an upper ridge
dominating the weather and keeping surface conditions warm and dry.

Will see above-normal daytime temperatures potentially approaching 90
degrees again inland Sun and memorial day. Removed thunder from the
cascade crest Sunday afternoon as models are backing off on
instability. However, kept thunder threat Mon with better instability
and model QPF showing indications of a convective pattern.

Models start to diverge Mon night and tue. The GFS shows a short-wave
disturbance reaching the area tue, which would bring a deeper marine
layer and result in a more stable air mass. But the ECMWF holds the
500 mb ridge axis over the area tue, for a continued slim threat of
cascade thunderstorms. Kept the threat of thunderstorms south of mt.

Jefferson Tue as the ECMWF seems to have done better recently with
the timing of the ridge breaking down. By Wednesday, both the GFS and
ecmwf show the ridge axis over the rockies and locally south to
southwesterly 500 mb flow, which may support more thunder along the
cascade crest, so added a slight chance of thunder Wednesday
afternoon and evening, mainly from about mt. Jefferson south. Bowen

Aviation Satellite imagery indicates a fairly decent shield
of stratocumulus across southwest washington and northwest oregon
early this morning, with some holes in the clouds noted. Cigs
areVFR except some MVFR along the coast. The clouds may tend to
fill in a bit more this morning. Expect clouds to break up west
of the cascades this afternoon though some scattered clouds may
persist a while in the afternoon. The cascades will likely see
some showers or thunderstorms develop and spread north to south
this afternoon and evening. Conditions tonight will be mostly
vfr, with any fog or low clouds inland patchy and forming late.

Along the coast there could be a little low stratus and fog later
tonight with local ifr conditions.

Kpdx and approaches...VFR conditions today, with occasionalVFR
cigs this morning.VFR conditions continuing tonight. Pt

Marine Winds have eased below small craft advisory thresholds
early this morning and will decrease more this morning. The
pattern of higher pressure over the NE pacific and lower
pressure inland will persist into early next week, and winds
should stay below small craft advisory thresholds through that
time period. Next modest front looks to be around the middle of
next week at the earliest.

Steep, choppy seas continue to run 1-2 ft above model guidance
early this morning, and thus don't expect seas to drop below and
stay below 10 ft until later today. Have extended the small craft
advisory for hazardous seas as a result. Seas then stay below 10
ft for at least the next week. Pt

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for hazardous seas until 3 pm pdt this
afternoon for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for rough columbia river bar until 8 am
pdt this morning.

Small craft advisory for rough columbia river bar from 4 pm
this afternoon to 7 pm pdt this evening.

Small craft advisory for rough columbia river bar from 4 am to
8 am pdt Friday.

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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 mi52 min 56°F1013.4 hPa
46243 - Clatsop Spit, OR - 162 28 mi34 min 55°F8 ft
ASTO3 - 9439040 - Astoria, OR 28 mi52 min N 1.9 G 2.9 50°F 58°F1013.1 hPa
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 36 mi74 min WNW 3.9 G 5.8 53°F 53°F10 ft1013.9 hPa (+0.0)46°F
46T29 40 mi44 min NNW 3.9 G 7.8 53°F 53°F1014.6 hPa46°F
46248 - Astoria Canyon, OR (179) 43 mi64 min 53°F11 ft

Wind History for Garibaldi, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR23 mi69 minN 010.00 miOvercast50°F46°F86%1013.3 hPa

Wind History from AST (wind in knots)
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Last 24hrNW11NW12NW11NW13
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NW12NW12NW12NW12NW7NW5NW7NW9W5NW7W3CalmCalmSE3SE4SE4S3Calm
1 day agoNW10NW12NW14NW13NW10NW6NW9NW12NW12NW13NW14
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NW16NW14NW5CalmSW4W4W9NW8NW7W3NW8NW9NW11NW10

Tide / Current Tables for Nehalem, Nehalem River, Oregon
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Nehalem
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Thu -- 12:27 AM PDT     8.07 feet High Tide
Thu -- 05:33 AM PDT     Sunrise
Thu -- 05:55 AM PDT     Moonrise
Thu -- 07:58 AM PDT     -1.26 feet Low Tide
Thu -- 12:46 PM PDT     New Moon
Thu -- 01:47 PM PDT     6.23 feet High Tide
Thu -- 07:47 PM PDT     1.23 feet Low Tide
Thu -- 08:48 PM PDT     Moonset
Thu -- 08:51 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.987.25.73.91.90.2-0.9-1.3-0.70.92.94.75.96.25.74.73.42.21.41.323.75.7

Tide / Current Tables for Brighton, Nehalem River, Oregon
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Brighton
Click for Map
Thu -- 12:03 AM PDT     8.79 feet High Tide
Thu -- 05:34 AM PDT     Sunrise
Thu -- 05:55 AM PDT     Moonrise
Thu -- 06:58 AM PDT     -1.71 feet Low Tide
Thu -- 12:46 PM PDT     New Moon
Thu -- 01:23 PM PDT     6.80 feet High Tide
Thu -- 06:47 PM PDT     1.61 feet Low Tide
Thu -- 08:48 PM PDT     Moonset
Thu -- 08:51 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.88.36.94.82.40.3-1.2-1.7-1.10.32.34.35.96.76.65.74.32.91.91.62.33.75.67.4

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Portland, OR (12,3,4,5)
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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.