Thursday, October28, 2021
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Marine Weather and Tides
Troutdale, OR

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:42AMSunset 6:04PM Thursday October 28, 2021 1:14 PM PDT (20:14 UTC) Moonrise 11:02PMMoonset 2:03PM Illumination 46% Phase: Third Quarter Moon; Moon at 23 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- 641 Am Pdt Thu Oct 28 2021
.small craft advisory in effect through late tonight...
In the main channel.. - general seas...10 to 12 ft through Thursday, subsiding to 5 to 7 ft Friday. - first ebb...around 1115 am Thursday. Seas 11 to 13 ft. - second ebb...around 1100 pm Thursday. Seas 9 to 11 ft. - third ebb...around 1230 pm Friday. Seas 7 to 9 ft.
PZZ200 641 Am Pdt Thu Oct 28 2021
Synopsis for the southern washington and northern oregon coast.. Weak high pres over the coastal waters today, as cold front sits well to the N and nw. This cold front will sag south this afternoon, and shift across the coastal waters tonight. High pres will build behind the front on Fri, with the high pres building inland over the pac nw this weekend.


7 Day Forecast for Marine Location Near Troutdale, OR
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location: 45.5, -122.39     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 281555 AAA AFDPQR

Area Forecast Discussion UPDATED National Weather Service Portland OR 855 AM PDT Thu Oct 28 2021

UPDATED . for morning aviation discussion.

SYNOPSIS. Light rain will continue at times today, but heavier rain spreads into the area from north to south later this afternoon through tonight. Lingering showers should end Friday night and the weekend should be dry with cool offshore flow. Rain returns Monday as a front moves through with more systems spread out through the week.

SHORT TERM. Today through Saturday . Warm frontal zone north of the area this morning, leaving the forecast area in the warm sector under light rain. The main focus of the pcpn is over the Olympic mountains in nw WA as an atmospheric river is directed in that area. Later today however the slide south into sw WA and nw OR. Models show the mean IVT 750-800 kg/ms this afternoon and evening for a location near the Columbia River entrance. Fortunately the front will be weakening and moving so any a particular location will not see prolonged period of heavy rain. Model soundings at KAST show sw wind around 40-45 kt between 1000 and 5000 ft through this evening. This will enhance orographics for the Willapa Hills and north Oregon coast range, and similarly for the south WA Cascades. Have increased QPF for the Willapa Hills and north Oregon coast range and south WA Cascades for this afternoon and evening. Think there should be a few hours of 0.2" per hour over the Willapa Hills this evening. Current stage forecast for Grays River @ Rosburg bring stage up to near bankfull tonight but no flooding is expected. Will have to watch this area closely. No other hydrologic concerns with quick rises on some coastal rivers. The pcpn should quickly decrease later later tonight and Friday morning as the front continues to weaken as it moves south across the forecast area as a splitting upper trough shifts onshore.

Temperatures will be quite mild today. In fact with the southerly flow in the warm sector of this system, temperatures have been steady for rising overnight, then a cool down late tonight in the wake of the front. Snow levels will be above all but the highest peaks at around 9000 to 10000 ft, then down to 5000 to 7000 ft Friday. By that time pcpn has eased so at this time does not look like Cascades will need winter weather headlines.

The operational model runs (NAM, GFS and ECMWF) retain a portion of the upper trough near the south Oregon and north California coast late Friday and Friday night. Precipitation is expected to diminish from northwest to southeast late Friday through Friday night, but shower potential will not be completely eliminated, especially for the far south part of the forecast area where an upper lows track east near the OR/CA border. This feature may be far enough south to keep any mention of precipitation out of the forecast area Saturday morning but enough uncertainly exists to keep low chance PoPs in the southern tier.

LONG TERM. Saturday night through Wednesday . Expect to see chance for pcpn taper off Sat night. For Sunday daytime should be dry, but will low chances for rain at the coast in the evening per NBM which appears to be aligned with the 00Z ECMWF. GEM and GFS indicating pcpn holding off until Mon morning. Cluster QPF analysis has only 1 cluster with QPF above the all-member for 24hrs ending 00Z Mon. Also the all-mean QPF for the same time has the 0.1" contour well offshore. So perhaps will be a dry Sunday after all. During this period will see offshore flow through the Columbia Gorge develops Saturday and then strengthens Saturday night and Sunday.

WPC 500 mb clusters valid Monday are in reasonable agreement showing the upper ridge shifting east as another weather system approaches the coast. About one-third of the GEFS and one-fourth of the EPS members are slower moving the ridge east. However, the operational ECMWF and GFS show the leading edge of the baroclinic boundary to the coast 12Z Monday. Tuesday may end up dry, but forecast confidence is lower. /mh Weishaar

AVIATION. Not much in way of change. With the warm front has lifted north towards the Puget Sound, leaving northwest Oregon and southwest Washington under mild air mass. But, still have moist west to southwest flow aloft. This will maintain plenty of clouds, with mostly VFR, for today. Expect areas of IFR to MVFR along the coast, where low level moisture continues to jam onshore against the coastal mtns. But, should gradually improve later this am.

Cold front well northwest of the area will sag southward later today and this evening, with CIGS gradually lowering again, with widespread MVFR on the coast by early evening, and MVFR spreading inland later this evening. MVFR with showers later tonight into Fri, with CIGS slowly improving from north to south Fri am.

For detailed regional Pac NW aviation weather information, go online to: https://weather.gov/zse

KPDX AND APPROACHES . Plenty of clouds today, with mostly VFR CIGS of 3500 to 4500 ft. CIGS may lift up higher from time to time, but then sink back to MVFR after 02Z as rain increases across area. MVFR will dominate from 04Z through most of tonight, as front shifts across area. At moment, frontal passage likely around midnight or just afterward.

MARINE. High pressure along the Oregon coast while a low pressure system heads into the WA coast near the Olympic Peninsula will keep southerly winds across the waters today, gusting up to 30 kts, with isolated 35 kt gusts. A cold front begins to push down from the WA waters late this afternoon into this evening, transitioning winds out of the north this evening and into Friday. Seas will be in the 10 to 13 foot through at least Friday afternoon. Friday, the northerly winds could be quite gusty as a strong upper level high pressure builds across the NE Pacific. At the same time a thermally induced low pressure begins to extend northward along the northern California/southern Oregon coast. This will keep seas at least 10 feet as well, continuing the Small Craft Advisory into Friday evening. By Saturday, offshore flow will be established, which may allow seas to drop below 10 ft. /Kriederman

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 11 PM PDT Friday for coastal waters from Cape Shoalwater WA to Florence OR out 60 nm.

Small Craft Advisory until 5 AM PDT Friday for Columbia River Bar.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 51 mi75 min 57°F1018.1 hPa (-0.6)
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 81 mi75 min 55°F1019.6 hPa (-0.4)
ASTO3 - 9439040 - Astoria, OR 88 mi75 min S 14G21 60°F 57°F1016.8 hPa (-0.3)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland-Troutdale Airport, OR3 mi22 minSW 510.00 miOvercast69°F59°F70%1018.7 hPa
Portland, Portland International Airport, OR13 mi22 minSSW 910.00 miOvercast67°F58°F73%1018.6 hPa
Pearson Airfield, WA17 mi22 minVar 310.00 miOvercast66°F59°F78%1018.7 hPa

Link to 5 minute data for KTTD

Wind History from TTD (wind in knots)
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Last 24hrSW7SW7S500E3NE3E3E5E7E7E8E12E9E7E6E5NE600S86S7SW5
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Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
Click for Map
Thu -- 12:26 AM PDT     1.65 feet High Tide
Thu -- 05:02 AM PDT     0.42 feet Low Tide
Thu -- 06:34 AM PDT     0.48 feet High Tide
Thu -- 07:45 AM PDT     Sunrise
Thu -- 09:23 AM PDT     0.18 feet Low Tide
Thu -- 01:06 PM PDT     Last Quarter
Thu -- 01:42 PM PDT     1.24 feet High Tide
Thu -- 03:05 PM PDT     Moonset
Thu -- 04:38 PM PDT     0.89 feet Low Tide
Thu -- 06:02 PM PDT     Sunset
Thu -- 07:15 PM PDT     1.13 feet High Tide
Thu -- 09:49 PM PDT     0.88 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Tillamook, Hoquarten Slough, Oregon
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Tillamook
Click for Map
Thu -- 02:54 AM PDT     0.52 feet Low Tide
Thu -- 07:49 AM PDT     Sunrise
Thu -- 09:04 AM PDT     4.85 feet High Tide
Thu -- 01:06 PM PDT     Last Quarter
Thu -- 03:06 PM PDT     2.43 feet Low Tide
Thu -- 03:09 PM PDT     Moonset
Thu -- 06:07 PM PDT     Sunset
Thu -- 06:59 PM PDT     5.22 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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