Wednesday, July17, 2019 L-36.com


Marine Weather and Tides
Astoria, OR

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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 5:35AMSunset 9:00PM Wednesday July 17, 2019 1:28 AM PDT (08:28 UTC) Moonrise 8:52PMMoonset 5:18AM Illumination 100% Phase: Full Moon; Moon at 15 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- 212 Pm Pdt Tue Jul 16 2019
In the main channel.. - general seas...3 to 4 ft through Wednesday night. - first ebb...around 530 pm Tuesday. Seas near 4 to 5 feet. - second ebb...strong ebb around 545 am Wednesday. Seas near 6 or 7 ft. - third ebb...around 545 pm Wednesday. Seas near 6 ft.
PZZ200 212 Pm Pdt Tue Jul 16 2019
Synopsis for the southern washington and northern oregon coast.. High pressure briefly returns today. A front moves through on Wed. High pressure will build offshore late in the week for a return to a more typical summer pattern which continues next week.


7 Day Forecast for Marine Location Near Astoria, OR
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location: 46.19, -123.85     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 170403 aaa
afdpqr
area forecast discussion... Updated
national service portland or
902 pm pdt Tue jul 16 2019
updated aviation discussion

Synopsis Isolated showers are possible this afternoon and evening
mainly across southwest washington. A frontal system will produce
more widespread light rain Wednesday through Thursday morning. Drier
and cooler air behind the front will help cool the overnight
temperatures a bit Thursday night. Warmer weather is expected for the
weekend.

Short term Tonight through Friday... Lots of strato-cu across the
region early this afternoon under an upper trough. The interior
valleys should progressively clear this afternoon and evening =, but
onshore winds will likely keep CU over the coast range and the
cascades. The onshore winds combined with upper support with the
trough from above may provide enough lift over the higher terrain for
isolated showers this afternoon and evening. South winds develop this
evening as a frontal system approaches. This will maintain dewpoint
temperatures in the mid to upper 50s across the area for two more
muggy nights with low temperatures near 60.

A weak warm front will bring light rain to the coast and areas north
overnight tonight into early Wednesday morning. Although the front is
weak, there is a lot of moisture available in the atmosphere as
modeled tpw values are around 1.4 inches. Models indicate there will
be enough isentropic lift ahead of the warm front to increase the
forecast confidence for measurable rain, and have increase pops
significantly along the coast and higher terrain of SW washington and
nw oregon. A trailing cold front will continue rain chances as it
moves inland Wednesday afternoon and night. Rainfall will be highest
along the coast and higher terrain of SW washington and extreme north
oregon where 0.25 to 0.5 inch of rain is possible from Wednesday
morning to Thursday morning. Barely any measurable rain is expected
for the willamette alley (0 to 0.10 inch), and around 0.05 to 0.15
inch of rain is expected for the coast range and cascades of central
oregon.

Drier north flow moves in behind the cold front Thursday afternoon,
which will allow the dew point temperatures to lower to near or below
50 Thursday night, and the minimum temperatures in the 50s. A weak
shortwave trough may generate some drizzle along the coast Friday
morning, but otherwise expect dry weather Friday with clearing in the
afternoon and day time temperatures warming into the upper 70s. ~tj

Long term Friday night through Tuesday... A high pressure ridge
builds over northwest oregon and southwest washington through Sunday
night. This will keep conditions fairly clear and dry through the
weekend. That ridge will start to weaken as a shortwave, associated
with a low in the north pacific, advances towards the coast. Marine
stratus will fill in along the coast and foothills on Monday. There
is an increased chance of occasional showers on Monday which will
persist through Tuesday. Elsewhere, conditions will remain mostly
sunny.

Aviation MVFR CIGS are starting to redevelop along the coast
this evening, whileVFR conditions prevail inland. A weaker
shortwave moving in tonight should mean inland terminals hold on
toVFR conditions overnight, but models show low stratus back-
building westward off the foothills of the cascades Wednesday
morning, so have included a deck of 2500 CIGS moving into ttd,
sle, and eug, and possibly pdx and hio as well. Better chance for
MVFR CIGS will be midday Wednesday as another weak front will
bring more light rain to areas around sle northward. Most of the
rain will fall along the coast, starting as drizzle overnight
tonight which may bring ifr lifr conditions to ast and onp,
mainly after 08z at onp and later at ast. Models show a mix of
vfr and MVFR conditions Wednesday afternoon and evening inland,
and probably a mix of ifr and MVFR conditions along the coast.

Kpdx and approaches...VFR conditions overnight. Could see a MVFR
deck move in after 12z, back-building westward off the cascades,
but confidence is not high enough to include it in the tafs right
now. Will see another round of light rain starting around 18z
wed which may mean a mix ofVFR and MVFR CIGS Wed afternoon and
evening. -mccoy

Marine The latest 12z run of the high resolution models have
converged fairly well on the shortwave trough that disturbs the
northwesterly flow associated with the north pacific high.

Although there are differences in the strength of these wind
speeds most of the models show significant wind speeds that
warrant the issuance of a small craft advisory. Winds will start
shifting into a southwesterly regime tonight. Wind gusts between
21 and 30 kt in the northern waters for most of the day
Wednesday. The southern waters have an advisory for a shorter
time period late Wednesday as these stronger winds are more
isolated to the north. However, this may change if the winds
extend farther south in future model runs.

High pressure begins to rebuild offshore on Thursday and
strengthens for the weekend. This will result in a return to
northerly winds through early next week. Gusts of 25-30 kt can
be expected for the weekend with the strongest winds beyond 10 nm
offshore.

Seas start in the 3 to 4 ft range, then build to around 8 feet
Thursday morning. Seas will be choppy as this system passes with
the potential for square seas on Thursday morning. Seas will
stay above 5 ft through the weekend.The larger seas are a
product of the increased wind wave height from the short wave
system that moves through Wednesday night into Thursday but also
from a 7 ft swell out of the NW that will be the dominant swell
throughout the forecast time period. -bphillips mh

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory from 8 am to 5 pm pdt Wednesday for
coastal waters from CAPE shoalwater wa to cascade head or
out 60 nm.

Small craft advisory from 11 am to 2 pm pdt Wednesday for
coastal waters from cascade head or to florence or out 60
nm.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ASTO3 - 9439040 - Astoria, OR 5 mi58 min S 2.9 G 5.1 62°F 69°F1014.8 hPa
46096 15 mi108 min 63°F
46243 - Clatsop Spit, OR - 162 15 mi58 min 65°F4 ft
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 34 mi98 min SW 9.7 G 12 64°F 64°F3 ft1015.2 hPa (-1.1)59°F
TOKW1 - 9440910 - Toke Point, WA 36 mi64 min WSW 9.9 G 12 64°F 67°F1014.9 hPa
46248 - Astoria Canyon, OR (179) 42 mi58 min 65°F3 ft
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 44 mi64 min 63°F1016.5 hPa
LOPW1 - 9440422 - Longview, WA 48 mi64 min 69°F1015.6 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR3 mi33 minSSW 510.00 miMostly Cloudy62°F57°F86%1015 hPa

Wind History from AST (wind in knots)
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Last 24hrS4CalmCalmCalmCalmCalmCalmW5W45W5W7W7W11W9W10W8W9W8W4W5SW3SW5SW5
1 day agoN8SW4SW4CalmCalmCalmSW5SW6SW6SW6SW4W4W5SW6SW10SW10SW12SW11SW9SW8SW5SW4CalmSW3
2 days agoCalmCalmSE3CalmS3SE3SE3CalmCalmN4N5N9NW8NW13NW12NW12NW8W9NW10NW9NW6W3SW5SW3

Tide / Current Tables for Astoria (Youngs Bay), Columbia River, Oregon
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Astoria (Youngs Bay)
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Wed -- 01:36 AM PDT     8.55 feet High Tide
Wed -- 05:40 AM PDT     Sunrise
Wed -- 06:18 AM PDT     Moonset
Wed -- 08:46 AM PDT     -1.03 feet Low Tide
Wed -- 03:10 PM PDT     7.20 feet High Tide
Wed -- 08:34 PM PDT     2.64 feet Low Tide
Wed -- 09:01 PM PDT     Sunset
Wed -- 09:52 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.58.48.57.664.12.20.5-0.7-1-0.31.23.25.16.57.26.95.94.73.62.82.73.54.9

Tide / Current Tables for Chinook, Baker Bay, Washington
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (4,6,7,8)
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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.