Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Seaside, 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 7:04AMSunset 5:46PM Wednesday February 20, 2019 7:08 AM PST (15:08 UTC) Moonrise 7:28PMMoonset 8:07AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 253 Am Pst Wed Feb 20 2019
.small craft advisory for winds and hazardous seas in effect through this afternoon...
.small craft advisory for hazardous seas in effect from this evening through Thursday evening...
Today..NW wind 20 to 25 kt with gusts to 30 kt, becoming N 15 to 20 kt with gusts to 25 kt in the afternoon. Wind waves nw 5 ft at 6 seconds. NW swell 9 ft at 13 seconds, building to 14 ft at 11 seconds. Showers.
Tonight..N wind 15 to 20 kt with gusts to 25 kt, becoming ne 5 to 10 kt with gusts to 15 kt after midnight. Wind waves ne 3 ft at 5 seconds. NW swell 13 ft at 12 seconds.
Thu..NE wind 5 to 10 kt. Wind waves ne 1 ft at 4 seconds. NW swell 12 ft at 13 seconds.
Thu night..N wind 5 to 10 kt with gusts to 15 kt, becoming S after midnight. Wind waves N 2 ft at 4 seconds, shifting to the S 1 ft at 4 seconds after midnight. W swell 9 ft at 13 seconds.
Fri..SW wind 10 to 15 kt with gusts to 20 kt. Wind waves sw 4 ft at 5 seconds. W swell 7 ft at 13 seconds. Rain.
Fri night..W wind 15 to 20 kt. Gusts to 25 kt, becoming 20 kt after midnight. Wind waves W 4 ft at 5 seconds. W swell 9 ft at 13 seconds. Showers.
Sat..W wind 10 to 15 kt. Wind waves 4 ft. NW swell 11 ft.
Sun..NW wind 5 to 10 kt. Wind waves 2 ft. NW swell 9 ft.
PZZ200 253 Am Pst Wed Feb 20 2019
Synopsis for the southern washington and northern oregon coast.. High pressure remains over the ne pacific this week. But several lows will move down along the coast. The strongest of these will likely move along the coast today. Another low will affect the coastal waters late Thursday into Friday.


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 201119
afdpqr
area forecast discussion
national weather service portland or
319 am pst Wed feb 20 2019

Synopsis An upper level trough will support showers across
southwest washington and northwest oregon today and tonight. Dry, but
cold weather is expected Thursday and Thursday night before a warm
front brings another round of rain and mountain snow Friday through
the weekend. The snow levels will start out relatively low Friday
morning, then rise to 1500 to 2000 feet in the afternoon. Showers are
likely to continue into early next week as the upper trough remains
over the pacific northwest.

Short term Today through Friday night... Radar imagery shows
persistent showers over SW washington and NW oregon early this
morning as an upper level shortwave trough is moving over the region.

Snow levels have lowered to around 1400 feet across SW washington and
extreme NW oregon to 2000 feet in lane county, oregon. Web cameras
and surface weather observations indicate that the winter weather
advisories for the cascades and the cascade foothills are on track
and have not made any additional changes to them.

High pressure filling in behind the shortwave will end showers from
north to south this afternoon through tonight. Gradual clearing
combined with a colder airmass will result in widespread below
freezing temperatures tonight. Weak winds and lingering surface
moisture will likely result in areas of freezing fog developing late
tonight into early Thursday, unless stratus forms first and limits
the radiation cooling.

Dry weather continues Thursday and Thursday night as a transitory
upper ridge moves over the pacific nw. The fog should clear by early
afternoon in most places, but light north winds through the
willamette valley may result in later clearing of low clouds and fog
in the south willamette valley.

Another low drops south from alaska early Friday, and models are
consistent in forecasting a warm front returning precipitation to sw
washington and NW oregon Friday and Friday night. The snow levels
will start out low, around 500 feet in the north interior valleys
with the onset of precipitation Friday morning, but warm air
advection should rapidly raise the snow levels to 1500-2000 feet by
the afternoon when the heavier precipitation is expected. Do not
expect any accumulating snow below 1000 feet Friday morning, but the
cascades and cascade foothills will likely see another 3 to 8 inches
of new snow Friday and Friday night. ~tj

Long term No changes. Previous discussion follows... No changes.

Previous discussion follows... Saturday
through Tuesday... Models begin the weekend in fairly good agreement,
with another cold upper trough with alaskan origins digging south
into the pacific northwest. A weak low coming down off the coast as
with previous systems, will enhance the chances for showers Friday
night through at least Saturday night. Thermal fields suggest
continued low snow levels, but not likely to impact valley floors
thanks in part to the low level onshore flow. The dynamics look
favorable through for accumulating snow down into the coast range and
cascade foothills. Showers likely to decrease Sunday and Sunday night
as onshore flow weakens.

Operational model solutions diverge sharply Sunday night through
Monday night, with ec most strongly indicating the weekend trough
weakening, and another east-west oriented upper trough redeveloping
further north along or north of the canadian border. A number of the
gefs perturbations, and eventually the GFS operational run shows
this trend, which will likely result in some warming of the air mass
early next week. For now prefer not to overly commit too much to the
ec or any other model for that matter given the uncertainties, but
will need to keep pops higher than operational GFS pops early next
week, more in line with a blend of nbm, ec and climatology.

Aviation Post frontal showers in northwesterly flow at surface
and aloft today. Showers end as flow turns northerly later in the
day and evening. Generally expect a mix ofVFR and MVFR cigs
through midday wed, thenVFR likely for the afternoon and
evening. Mountains obscured at times through about 00z thu, then
gradual improvement is expected. The interior TAF sites may
have ifr fog develop later tonight into thu.

Kpdx and approaches...VFR prevailing but will likely see
occasional MVFR CIGS through early afternoon. Showers taper off
late in the day and evening. May see fog develop late tonight.

Mh

Marine We remain in a northwesterly flow pattern through the
end of this week. A low pressure system will drop south along
coast today. High pressure over the NE pacific will keep pressure
gradients strong enough for gusts 30 to 35 kt today, then winds
gradually ease from north to south tonight. High pressure
strengthens east of the cascades by Thu for north to northeast
winds, but weaker than today. High pressure inland weakens late
thu as the next low pressure drops in from the bc coast fri.

Expect this one to be a bit weaker, but will likely bring
moderate small craft advisory winds.

Seas will also build with this system, getting back up over 10
feet then peaking around 14 to 17 feet on today. Seas gradually
subside through the day thu. Seas aren't expected to drop back
down below 10 feet, though, until late Thu night. Seas build back
up above 10 feet on sat. Mh

Pqr watches warnings advisories
Or... Winter weather advisory until 4 pm pst this afternoon for
cascade foothills in lane county-cascades in lane county-
northern oregon cascade foothills-northern oregon cascades.

Wa... Winter weather advisory until 4 pm pst this afternoon for south
washington cascades.

Winter weather advisory until noon pst today for south
washington cascade foothills.

Pz... Small craft advisory until 6 pm pst this evening for coastal
waters from CAPE shoalwater wa to florence or out 10 nm.

Small craft advisory for hazardous seas from 6 pm this evening
to 10 pm pst Thursday for coastal waters from cape
shoalwater wa to florence or out 10 nm.

Small craft advisory until midnight pst tonight for waters from
cape shoalwater wa to cascade head or from 10 to 60 nm.

Small craft advisory for hazardous seas from midnight tonight
to 10 pm pst Thursday for waters from CAPE shoalwater wa
to cascade head or from 10 to 60 nm.

Small craft advisory until 4 am pst Thursday for waters from
cascade head to florence or from 10 to 60 nm.

Small craft advisory for hazardous seas from 4 am to 10 pm pst
Thursday for waters from cascade head to florence or from
10 to 60 nm.

Small craft advisory for rough columbia river bar until 6 pm
pst this evening.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ASTO3 - 9439040 - Astoria, OR 16 mi39 min WSW 5.1 G 5.1 41°F 40°F1010.9 hPa
46243 - Clatsop Spit, OR - 162 19 mi39 min 47°F10 ft
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 31 mi39 min 46°F1012.3 hPa
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 32 mi79 min NW 25 G 31 46°F 46°F11 ft1011.5 hPa (-0.9)38°F
46248 - Astoria Canyon, OR (179) 40 mi39 min 51°F12 ft
TOKW1 - 9440910 - Toke Point, WA 49 mi39 min W 2.9 G 2.9 39°F 45°F1011.1 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR11 mi74 minN 010.00 miLight Rain39°F37°F96%1011.2 hPa

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Last 24hr------------------------------------------------
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Tide / Current Tables for Seaside, 12th Avenue bridge, Necanicum River, Oregon
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Seaside
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Wed -- 12:59 AM PST     5.70 feet High Tide
Wed -- 07:10 AM PST     Sunrise
Wed -- 07:54 AM PST     0.63 feet Low Tide
Wed -- 08:06 AM PST     Moonset
Wed -- 12:33 PM PST     6.67 feet High Tide
Wed -- 05:49 PM PST     Sunset
Wed -- 07:27 PM PST     Moonrise
Wed -- 08:32 PM PST     -0.41 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.25.75.44.73.62.51.50.80.61.43.15.16.56.66.15.23.92.51.20.2-0.3-0.30.82.6

Tide / Current Tables for Astoria (Youngs Bay), Columbia River, Oregon
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Astoria (Youngs Bay)
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Wed -- 01:52 AM PST     8.77 feet High Tide
Wed -- 07:10 AM PST     Sunrise
Wed -- 07:38 AM PST     1.58 feet Low Tide
Wed -- 08:06 AM PST     Moonset
Wed -- 01:32 PM PST     9.86 feet High Tide
Wed -- 05:48 PM PST     Sunset
Wed -- 07:27 PM PST     Moonrise
Wed -- 08:15 PM PST     -1.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.88.38.886.54.62.91.81.62.64.56.78.59.79.78.66.541.7-0.1-1-0.70.93.1

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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Wind Forecast for Portland, OR (10,2,3,4)
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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.