Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Jeffers Gardens, OR

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:51AMSunset 7:40PM Thursday March 30, 2017 1:24 PM PDT (20:24 UTC) Moonrise 7:49AMMoonset 10:08PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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- 858 Am Pdt Thu Mar 30 2017
.small craft advisory for rough columbia river bar in effect from 4 pm this afternoon to 8 pm pdt this evening...
In the main channel..Combined seas 9 ft this morning subsiding to 7 ft by tonight. However...seas will temporarily build to 10 ft with breakers possible during the ebb around 730 pm this evening...and to 11 ft with breakers possible during the very strong ebb around 745 am Fri morning.
PZZ200 858 Am Pdt Thu Mar 30 2017
Synopsis for southern washington and northern oregon coast.. A ridge of high pres will build over the waters tonight and remain through Fri. A weak front will move across the waters Sat morning. High pres builds in from the W Sat afternoon through Sun.

7 Day Forecast for Marine Location Near Jeffers Gardens, OR
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location: 46.18, -123.87     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 301713
afdpqr
area forecast discussion
national weather service portland or
1013 am pdt Thu mar 30 2017

Synopsis Showers will be decreasing today and mostly ending
tonight and Friday as an upper level trough departs to the east. A
positively tilted upper ridge will be over the pacific northwest
Friday into Friday night for dry weather. The next front will move
in later Friday night and Saturday, weakening as it moves through,
with decreasing precipitation late Saturday and Saturday night. A
weak upper trough will be dropping in from the northwest Sunday and
Sunday night with a few showers, especially over the higher terrain,
lingering into Monday morning. An upper ridge will then briefly
build in before the next system arrives around Tuesday night and
Wednesday.

Short term Today through Saturday... Showers on the back side of an
upper level trough will be decreasing through the day today as the
upper level trough moves off to the east. A few showers will linger
near the higher terrain into tonight but mostly end as we move into
Friday as a positive tilted upper ridge moves into the pacific
northwest. With such wet ground, this raises the possibility of some
fog, though the models indicate that enough clouds may persist into
Friday morning that any fog would be patchy. However, we should see
some sunshine break through finally Friday afternoon.

The next system will edge in from the northwest late Friday night
with the main period of some precipitation Saturday morning,
especially along the coast and across our northern interior
forecast zones. Likely pops seem reasonable for those areas though
amounts will be limited as the system will be weakening some.

Precipitation tapers off on all the models later Saturday and
Saturday night behind the system under flat westerly flow aloft.

On Sunday an upper trough carves out or digs down from the northwest
over the pacific northwest and this could lead to a few showers,
especially over the higher terrain but cannot be ruled out over the
valleys.

Snow levels will be below the cascade passes today into tonight, rise
considerably Friday, stay mostly above the passes this weekend,
perhaps falling back down to near the passes again Sunday. Tolleson

Long term No changes. Previous discussion follows...

Sunday through Thursday... Models are in fairly good agreement through
about Monday with a weak upper trough moving through the area for a
continued low chance of showers although it might be fairer to say
most areas will likely be on the drier side versus wetter. 00z models
are now keeping Tuesday under a passing dry upper ridge but have left
pops intact for the time being until better run to run consistency
develops. They also now have a warm front clipping the region on
Wednesday but are showing little rain interest and keeping the threat
mainly north. The GFS and the ECMWF are in good large scale agreement
having the golf low deepen offshore Wednesday night and Thursday. The
details still need some strong ironing though as the GFS brings a
cold front across the region early Thursday while the ec stalls the
front just offshore while an unseasonably aggressive surface and
developing compact upper develops and swings north just west of 130w.

Will certainly want to keep an eye on the ec solution as a 968mb
surface low is highly unusual this late in the season. Fortunately,
the current forecast track keeps it well offshore with only a
glancing blow of winds at the coast Thursday night. /jbonk

Aviation Scattered MVFR CIGS continue this morning. May need to
extend the tempo group for a few more hours, but by early afternoon,
expect ceilings to lift toVFR, even when showers move through. All
taf sites will becomeVFR by late this afternoon once ridging builds
into the area. Expect either low clouds or fog to develop in the
valley tonight given residual low level moisture and high pressure
aloft. Northerly winds will keep lowest levels mixed through 09z but
winds will go calm between 09z and 12z. The biggest question then
will be whether the stratus develops before this time and inhibits
fog development or if any development holds off until winds go calm
and fog is the predominant restriction. Either way, expect flight
conditions to deteriorate to MVFR with ifr visibility a possibility.

Pdx and approaches... MostlyVFR conditions today with occasional MVFR
conditions possible through the remainder of the morning. MVFR or
worse conditions tomorrow morning from either fog or low clouds. Will
have a better idea of which is more likely by later this evening.

/bentley

Marine Nw winds around 10 to 15 kt this morning will continue to
weaken today and tonight as a surface ridge of high pres builds over
the waters. A weak front will move east across the waters sat
morning, but winds are likely to remain under 20 kt with this system.

The next chance for small craft advisory winds comes with northerly
winds over the oregon waters Sat night and sun.

A wnw swell around 10 ft 14 seconds early this morning will subside a
couple of feet today. Seas are expected to remain under 10 ft until
sat night and Sun when a westerly swell arrives and brings seas up
into the 12 to 14 ft range.

Pqr watches/warnings/advisories
Or... None.

Wa... None.

Pz... Small craft advisory for rough columbia river bar from 4 pm
this afternoon to 8 pm pdt 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 6 mi54 min W 12 G 16 47°F 47°F1025.1 hPa
46243 - Clatsop Spit, OR - 162 14 mi54 min 47°F8 ft
TOKW1 - 9440910 - Toke Point, WA 37 mi54 min NNW 12 G 18 48°F 49°F1024.8 hPa
46248 - Astoria Canyon, OR (179) 41 mi54 min 50°F9 ft
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 43 mi54 min 50°F1026.1 hPa
LOPW1 - 9440422 - Longview, WA 49 mi54 min 46°F1024.3 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR1 mi29 minNW 1210.00 miPartly Cloudy52°F42°F69%1025 hPa

Wind History from AST (wind in knots)
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Last 24hrSW15
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W8W5W4W5SW4W8W9W8W7NW11
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2 days agoSW13
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SW7SW9SW8SW11SW8SW8
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Tide / Current Tables for Astoria (Port Docks), Oregon
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Astoria (Port Docks)
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Thu -- 03:25 AM PDT     8.90 feet High Tide
Thu -- 06:58 AM PDT     Sunrise
Thu -- 08:49 AM PDT     Moonrise
Thu -- 10:07 AM PDT     -0.43 feet Low Tide
Thu -- 04:13 PM PDT     7.75 feet High Tide
Thu -- 07:42 PM PDT     Sunset
Thu -- 10:08 PM PDT     1.11 feet Low Tide
Thu -- 11:07 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.96.17.88.88.77.65.63.51.50.2-0.401.43.55.577.77.46.34.62.91.71.11.5

Tide / Current Tables for Tongue Point, Astoria, Columbia River, Oregon
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Tongue Point
Click for Map
Thu -- 03:33 AM PDT     9.40 feet High Tide
Thu -- 06:57 AM PDT     Sunrise
Thu -- 08:48 AM PDT     Moonrise
Thu -- 10:10 AM PDT     -0.43 feet Low Tide
Thu -- 04:21 PM PDT     8.25 feet High Tide
Thu -- 07:41 PM PDT     Sunset
Thu -- 10:11 PM PDT     1.11 feet Low Tide
Thu -- 11:07 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.96.28.19.29.38.26.23.91.80.3-0.4-01.43.55.67.38.286.853.21.81.11.5

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 (16,3,4,5)
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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.