Sunday, July23, 2017 L-36.com


Marine Weather and Tides
Seaside, OR

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 5:42AMSunset 8:54PM Saturday July 22, 2017 11:58 PM PDT (06:58 UTC) Moonrise 4:04AMMoonset 7:25PM Illumination 0% Phase: New Moon; Moon at 29 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- 841 Pm Pdt Sat Jul 22 2017
.small craft advisory in effect through late Sunday night...
Tonight..N wind 15 to 20 kt with gusts to 25 kt. Wind waves N 5 ft at 6 seconds. W swell 3 ft at 8 seconds.
Sun..N wind 20 to 25 kt with gusts to 30 kt. Wind waves N 7 ft at 7 seconds. W swell 2 ft at 8 seconds.
Sun night..N wind 20 to 25 kt with gusts to 30 kt. Wind waves N 7 ft at 7 seconds. NW swell 3 ft at 8 seconds.
Mon..N wind 20 to 25 kt. Wind waves N 5 ft at 6 seconds. NW swell 7 ft at 8 seconds.
Mon night..NW wind 20 to 25 kt. Wind waves nw 5 ft at 7 seconds. NW swell 6 ft at 8 seconds.
Tue..NW wind 15 to 20 kt with gusts to 25 kt. Wind waves 4 ft. NW swell 6 ft.
Tue night..NW wind 10 to 15 kt with gusts to 20 kt. Wind waves 3 ft. NW swell 7 ft.
Wed..NW wind 10 to 15 kt. Wind waves 3 ft. NW swell 6 ft.
Thu..NW wind 5 to 10 kt. Wind waves 2 ft. W swell 4 ft.
PZZ200 841 Pm Pdt Sat Jul 22 2017
Synopsis for southern washington and northern oregon coast.. High pres will continue to strengthen over the ne pac through Sunday, with thermal low pres strengthening over sw or and nw ca. Gusty N winds and steep seas increasing tonight and will continue through early next week.

7 Day Forecast for Marine Location Near Seaside, OR
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location: 46, -123.92     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 230359
afdpqr
area forecast discussion
national weather service portland or
859 pm pdt Sat jul 22 2017

Synopsis A weak upper trough will pass over washington on Sunday
for a slight increase in onshore flow over southwest washington and
northwest oregon, bringing a bit of cooling to to the coast and to
the northern willamette valley. An upper ridge will build over our
forecast area on Monday and Tuesday for a warming trend. An upper
level low to our southwest may produce some thunderstorms in the lane
county cascades Sunday through Tuesday afternoon and evening.

Increased onshore flow and cooler conditions are expected for the
second half of next week, bringing temperatures back to near normal.

Short term Tonight through Tuesday... A fair amount of low clouds
were solidifying along the washington and oregon coasts this evening
and will spread inland later tonight and Sunday morning as an upper
trough passing by to the north on Sunday results in increased onshore
flow. While Saturday afternoon temperatures reached the lower 90s in
most valley locations, we should see about 5 degrees o cooling
Sunday, especially north.

There is a developing upper low off the coast of california which
will move to near the northern california coast Sunday and linger
through at least Tuesday. Southerly flow develops aloft ahead of the
low and will likely result in increasing higher level moisture and
instability over the southern portion of our oregon cascades for a
chance of thunderstorms Sunday afternoon through Tuesday, especially
during heating in the afternoon and evening hours. This appears to be
the most significant chance of lightning with the potential for fire
starts in the cascades so far this summer. Models show that any
moisture that does form will be high level and not likely to produce
any significant precipitation from these storms. The southerly flow
combines with the upper ridge to the north of the low for warming on
both Monday and Tuesday, with highs in the valley in the lower 90s on
Monday and upper 80s on Tuesday. Tolleson

Long term No changes. Previous discussion follows...

Tuesday night through Saturday... Models are in good agreement kicking
out the upper low over northern california and moving it northwest
during the day on Wednesday. Weak westerly flow develops at 700mb as
the low moves out it looks like the threat of thunderstorms will be
greatly reduced. However, this could change if the upper low lingers,
which they are notorious for doing this time of year. That could
prolong convection for another afternoon and evening heating cycle.

Models show a upper trough approaching from the northwest by Thursday
which puts us back in wsw flow aloft and drys out the cascades ending
any thunderstorm threat. Night and morning low clouds may become more
extensive Thursday through Saturday with temperatures returning to
near normal. Schneider

Aviation Low clouds have moved onto the coast south of tillamook,
with lifr conditions expected to continue at onp overnight tonight.

Clouds will eventually make their way up to kast but expect CIGS to
be a bit higher with ifr CIGS later tonight. Inland isVFR tonight,
and will stay predominantlyVFR overnight. Some indication in the
models that we will see some areas of MVFR CIGS move into the north
willamette valley Sunday morning, but not feeling that confident
since there isn't the solid cloud bank off the coast of ast just yet.

If mfr CIGS do develop inland, expect them to clear by 17z-18z. Along
the coast, CIGS will hold on until around 18z-21z. As winds increase
along the coast, expect improving conditions at onp earlier than ast.

Expect a breezy day along the coast with wind gusts up to 30 kt
Sunday afternoon. Inland will become breezy as well with north winds
up to 20 kt.

Kpdx and approaches... PredominantlyVFR through the next 24 hours.

Small chance of MVFR CIGS around 2000 ft moving into the terminal
between 13-17z Sunday, but confidence is low. Gusty northwesterly
winds to 20 to 25 kt possible Sunday afternoon and evening. -mccoy

Marine No changes. Previous discussion follows...

high pressure will continue to strengthen over the NE pacific this
afternoon, while hot weather over SW oregon and NW california will
help to strengthen a thermal trough over those areas. This will bring
an increase in northerly winds, with gusts 25-30 kt expected across
our southern waters by sunset and spreading north into our northern
waters later tonight. The increasing winds will result in steep wind-
driven seas. Winds will continue to increase on Sunday. Models
continue to suggest that gale force winds are possible over our
southern waters. However, northerly gales over our waters are
relatively rare, so given that the stronger models continue to only
show marginal gales will stick with our current small craft
advisories for winds and hazardous seas, but would not be surprised
local gusts to 35 kt. SCA conditions look to persist into Tuesday so
the current advisories will likely need to be extended. Models then
show an upper trough from the gulf of alaska moving closer to our
waters which will likely bring a decrease in winds seas towards the
middle of next week. 64

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory until 6 am pdt Monday for coastal waters
from CAPE shoalwater wa to florence or out 60 nm.

Small craft advisory for rough columbia river bar from 3 am to
7 am pdt Sunday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46096 16 mi148 min N 18 G 18 56°F 62°F1020.9 hPa
ASTO3 - 9439040 - Astoria, OR 16 mi46 min NNW 7 G 9.9 64°F 72°F1019.6 hPa
46243 - Clatsop Spit, OR - 162 19 mi58 min 62°F4 ft
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 31 mi52 min 56°F1019.3 hPa
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 32 mi68 min N 14 G 16 61°F 59°F4 ft1020.4 hPa (-0.3)59°F
46T29 36 mi38 min N 16 G 19 62°F 62°F1021.1 hPa58°F
46248 - Astoria Canyon, OR (179) 39 mi58 min 62°F4 ft
TOKW1 - 9440910 - Toke Point, WA 49 mi46 min N 8.9 G 12 60°F 67°F1020.6 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR11 mi63 minNW 12 G 2110.00 miFair63°F55°F78%1019.9 hPa

Wind History from AST (wind in knots)
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Last 24hrS3S3SE4SE3SE4CalmSE3CalmSE3CalmNE3N8NW6NW7W7NW9W11NW13NW10NW13NW12NW13NW14NW12
G21
1 day agoS3SE3SE3SE3SE3SE3SE3SE3SE3E3NE5W3W6SW7W9W8W8W7W5W7SW4W3W3Calm
2 days agoS3S3CalmS8S5S6S5SE5S4SW5SW6W9S6SW7W11SW8SW9SW7W5W5W4W4CalmCalm

Tide / Current Tables for Seaside, 12th Avenue bridge, Necanicum River, Oregon
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Seaside
Click for Map
Sun -- 12:07 AM PDT     6.65 feet High Tide
Sun -- 02:47 AM PDT     New Moon
Sun -- 05:48 AM PDT     Sunrise
Sun -- 06:12 AM PDT     Moonrise
Sun -- 08:28 AM PDT     -0.66 feet Low Tide
Sun -- 01:43 PM PDT     5.12 feet High Tide
Sun -- 08:20 PM PDT     0.78 feet Low Tide
Sun -- 08:55 PM PDT     Sunset
Sun -- 09:12 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.66.55.84.83.52.10.8-0.1-0.6-0.50.52.23.84.95.14.73.9321.20.812.34.2

Tide / Current Tables for Warrenton, Skipanon River, Columbia River, Oregon
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Warrenton
Click for Map
Sun -- 01:04 AM PDT     9.25 feet High Tide
Sun -- 02:47 AM PDT     New Moon
Sun -- 05:47 AM PDT     Sunrise
Sun -- 06:12 AM PDT     Moonrise
Sun -- 08:06 AM PDT     -1.82 feet Low Tide
Sun -- 02:33 PM PDT     7.50 feet High Tide
Sun -- 08:00 PM PDT     1.80 feet Low Tide
Sun -- 08:55 PM PDT     Sunset
Sun -- 09:12 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.79.28.87.252.60.5-1.1-1.8-1.40.12.14.36.27.37.46.553.52.31.82.33.75.6

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 (2,6,7,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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.