Wednesday, April1, 2020
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Marine Weather and Tides
Astoria, OR

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:48AMSunset 7:42PM Wednesday April 1, 2020 12:50 PM PDT (19:50 UTC) Moonrise 10:59AMMoonset 2:15AM Illumination 63% Phase: Waxing Gibbous; Moon at 9 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- 958 Am Pdt Wed Apr 1 2020
In the main channel.. - general seas...around 7 ft through Wednesday subsiding to 5 ft Thursday. - first ebb...around 11 am Wednesday. Seas to 9 ft. - second ebb...around 1215 am Thursday. Seas to 6 ft. - third ebb...around 1230 pm Thursday. Seas to 5 ft.
PZZ200 958 Am Pdt Wed Apr 1 2020
Synopsis for the southern washington and northern oregon coast.. A weak low off the wa coast will drift south across the north or waters this morning then inland near cascade head in the afternoon. High pressure strengthens offshore by Thursday.


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 011738 AAB AFDPQR

Area Forecast Discussion . UPDATED National Weather Service Portland OR 1035 AM PDT Wed Apr 1 2020

Updated Aviation and Marine Discussion

SYNOPSIS. A complex upper low will continue to impact the forecast area through the remainder of the week. A cool and unstable air mass will lead to a threat of thunderstorms Wednesday, with small hail possible in heavier showers. The cool and unsettled pattern continues Thursday as another trough of low pressure moves across. Friday and Saturday sees a smaller chance for showers as the storm track passes by the region to the west and south.

SHORT TERM. Today through Friday: Couple of updates made for today. First, the instability brought with the upper low descending over the area has forced accumulating snow to fairly low elevations across the north Coast Range. Saw light accumulations along the side of the road at Lees Camp at 600 feet with accumulations on the road at Sunset Summit (~1400 feet). As such, lowered snow levels this morning to match. Also, widened the rain/snow mix band to cover 800 feet below the all snow line for the entirety of today as the colder convective air mass will support snow surviving to lower elevations than on a typical day. Second, added a thunder threat to the coast and waters for this morning. have not seen any storms develop yet, but cannot rule out the threat, especially as showers in the increasingly unstable air over the top of us get forced into the coast range terrain. Surface temperatures only need to reach the low 40s to become sufficiently buoyant to produce deep convection and thunderstorms. Most of these should be short duration "one hit wonders" but are still thunderstorms nonetheless.

Satellite shows the upper low center is now about 30 miles off the Columbia Mouth with the surface reflection lagging behind just off Willipa Bay. Models continue to show the low centers to move inland today. This will bring the instability further inland and do expect a day similar to yesterday with plenty of showers, many with embedded small hail. Conditions on the immediate coast should stabilize as low level flow turns more onshore and mid level warming increases. Inland surface temperatures, however, should warm enough to overcome the mid-level warming. Updated grids and text have been sent. /JBonk

Previous discussion from 230 AM follows: Satellite pictures showed a vertically stacked low off the coast of the Olympic peninsula early this morning. Models have consistently shown this low opening up into a trough today and moving southeast across the forecast area today and tonight. Initially onshore flow this morning along with deep moisture will keep showers widespread. The low level onshore flow weakens later today and tonight as moisture becomes more restricted to low levels. Cooling aloft with the upper trough will tend destabilize the air mass, with model soundings indicating deep enough instability to continue to include a slight chance for thunderstorms this afternoon and evening. The already cool air mass will keep snow levels low, in the range of 1500 to 2500 feet through this evening. The low snow levels will also aid heavier showers today to produce small hail at low elevations.

In a northerly flow aloft on the backside of the main upper trough Thursday, another shortwave is expected to drop south through the area at the end of the day. Low level onshore flow from the northwest Thursday will keep low levels moist enough to fuel another round of showers. Model soundings from the 00Z model runs suggested depth of unstable layer Thursday afternoon may be marginally deep enough to support a thunderstorm threat, but prefer to hold off any mention at this time as past runs were less optimistic for seeing sufficiently deep enough instability.

Another pair of shortwaves approaches the region late Friday, but the forecast area appears likely to fall between the two shortwaves, with the primary low tracking towards the south Oregon or north California coast, and a northern stream shortwave crossing through Washington. This will keep a chance, albeit a reduced chance, in the forecast for Friday afternoon for most areas. Daytime temperatures through the next few days will remain cooler than normal under the influence of the cool upper trough.

LONG TERM. Friday night through Tuesday . Models in good agreement showing a longwave upper trough remaining over the west coast through Sunday night. In general most of the shortwave energy however appears likely to track south off the coast before moving inland to the south, most likely across California. The presence of the longwave trough suggests at least some chance of showers persists through the weekend, but probably the better chance for showers comes late in the weekend as models open up a southerly flow aloft allowing better moisture to spread north. While models have continued to struggle with the general pattern from day 6 on, there is a trend in the models early next week with the 00Z runs, suggesting ridging potentially building in, lessening the chances for showers again Monday and Tuesday.

AVIATION. Westerly winds and post-cold frontal showers will continue through Wednesday night. Slight chance of thunderstorms along with small hail possible through 03Z Thursday. Conditions to improve towards to predominately VFR after around 20Z Wednesday, with occasional MVFR conditions associated with showers and thunderstorms through the daytime hours. Showers ease after 00Z Thursday with VFR conditions continuing. After about 06Z Thursday along the coast and 10Z inland there is an increasing chance for MVFR cigs to develop.

PDX AND APPROACHES . Current conditions expected to improve towards predominately VFR around 20Z Wednesday. Occasional MVFR conditions associated with showers and thunderstorms through 03Z Thursday. Slight chance of thunderstorms with small hail through 03Z Thursday. Showers ease after 00Z Thursday with VFR conditions continuing, but after 12Z there is an increasing chance for MVFR cigs to develop. /42

MARINE. Have extended the current small craft advisory through Wednesday afternoon. Winds in the 10 to 15 kt range with occasional convective gusts up to 25 kt. Winds will continue to ease today as a weak low moves over the northern OR waters and then inland, which will cause the winds to weaken and shift to a more northwesterly direction. High pressure will strengthen offshore in the afternoon, but will be weakened as a series of weak troughs drop south over the waters through late in the week. Models continue to show a developing low undercutting this weak ridge and approach from the west on Friday, but guidance continues to show the low will continue a southeastward track towards the Oregon/California border.

Seas around 09 to 11 ft with periods between 09 to 11 seconds. Have extended the current small craft advisory through Wednesday afternoon. Seas will continue to subside to around 4 to 6 ft through the latter part of the week. /42

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 5 PM PDT this afternoon for coastal waters from Cape Shoalwater WA to Florence OR out 60 NM.



Interact with us via social media: www.facebook.com/NWSPortland www.twitter.com/NWSPortland

This discussion is for Northwest oregon and Southwest Washington from the Cascade crest to 60 nm offshore. This area is commonly referred to as the forecast area.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ASTO3 - 9439040 - Astoria, OR 5 mi50 min N 6 G 8.9 44°F 47°F1017.5 hPa (+0.8)
46243 - Clatsop Spit, OR - 162 15 mi20 min 48°F6 ft
46029 - COL RIVER BAR - 20NM West of Columbia River Mouth 34 mi60 min ENE 7.8 G 9.7 44°F 48°F7 ft1018.2 hPa (+2.3)38°F
TOKW1 - 9440910 - Toke Point, WA 36 mi56 min E 1.9 G 2.9 46°F 49°F1018.4 hPa
46248 - Astoria Canyon, OR (179) 42 mi20 min 49°F8 ft
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 44 mi50 min 49°F1017.8 hPa (+0.5)
LOPW1 - 9440422 - Longview, WA 48 mi56 min 47°F1018.6 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Astoria, Astoria Regional Airport, OR3 mi55 minENE 510.00 miPartly Cloudy45°F39°F80%1017.5 hPa

Link to 5 minute data for KAST

Wind History from AST (wind in knots)
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Tide / Current Tables for Astoria (Youngs Bay), Columbia River, Oregon
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Astoria (Youngs Bay)
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Wed -- 12:48 AM PDT     3.68 feet Low Tide
Wed -- 03:15 AM PDT     Moonset
Wed -- 03:21 AM PDT     First Quarter
Wed -- 06:41 AM PDT     7.85 feet High Tide
Wed -- 06:53 AM PDT     Sunrise
Wed -- 11:59 AM PDT     Moonrise
Wed -- 02:16 PM PDT     0.88 feet Low Tide
Wed -- 07:44 PM PDT     Sunset
Wed -- 09:17 PM PDT     6.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.83.744.85.977.77.87.36.34.83.321.30.911.62.63.84.85.76.165.4

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
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GEOS 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 (15,3,4,5)
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Ground Weather Radar Station Portland, OR
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