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PZZ210 Columbia River Bar- 230 Am Pst Sun Dec 10 2023
.small craft advisory in effect through this afternoon...
In the main channel..
General seas..12 to 13 ft subsiding to 7 ft Monday morning.
First ebb..Ebb current of 2.81 kt at 223 am Sunday. Seas 12 to 14 ft.
SEcond ebb..Strong ebb current of 5.63 kt at 242 pm Sunday. Seas 11 ft.
Third ebb..Ebb current of 2.9 kt at 308 am Monday. Seas 7 ft.

PZZ200 230 Am Pst Sun Dec 10 2023
Synopsis for the southern washington and northern oregon coast.. Remnants of a warm front through Sunday. Decreasing winds and seas as high pressure builds over the area through mid-week.

FXUS66 KPQR 101028 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 225 AM PST Sun Dec 10 2023

SYNOPSIS
Rain, heavy at times this morning. Then, as cold front moves onshore, rain will decrease from north to south across the region. Showers tonight into Monday. Then, high pressure builds across the Pac NW, with a stretch of dry weather along with some cool offshore flow for Tue into Wed. But, will see a front bring some rain back to region later Wed into Thu.

SHORT TERM
(TODAY THROUGH TUESDAY)...
Cold front well offshore will continue to slowly move towards the coast this am. At 2 am, NOAA satellite imagery showing baroclinic zone and embedded cold front sitting over western Washington draping back over far northwest Oregon, then extending offshore to west and southwest of Oregon to a low located near 39N 138W. The cold front over western Washington and off Oregon coast will sag inland early this am, with rain decreasing over the south Washington coast and Willapa Hills after daybreak. But, the front stalls for a bit over northwest Oregon and offshore as the low well to the southwest approaches. This low should push onshore over western central Oregon (between Newport and North Bend) early this afternoon. Once that happens, the rain shield will shift farther southward. By noon, bulk of the rain will be south of Newport to Salem line, with that shifting farther to the south/east this afternoon. Bulk of the rain will be to east/southeast of a Eugene to Santiam Pass this evening.

Quite a bit of moisture has been embedded in the air mass, as remains of an older atmospheric river that was over the north Pac last week.
But, still potent enough to produce hefty shot of rainfall across the region. As of 2 am Sunday, have seen 1 to 2 inches of rain have fallen along the coast, and with a bit more over the nearby coastal mtns. Still expecting another 1 to 3 inches along the coast/coastal mtns, mostly to south of the Columbia River. Farther inland, generally 0.75 to 1.25 inches of rain for the lowlands (Willamette Valley and Cowlitz Valley), with 1 to 3 inches across the Cascades.
While still to early to end the Flood Watch (for south WA Coast/Willapa Hills and the north Oregon Coast/Coast Range). But, at moment, looks like a rivers will remain below flood stage. That said, they will still be running rather full, so use caution if near rivers, and be ready for localized low spot flooding due to standing/ponding of water in low spots.

Snow levels are high this am, mostly above 5000 ft. So, will end Winter Weather Advisory in the south WA Cascades.

Rain decreasing this evening, with most areas generally more showery in nature. Cooler air aloft will push inland tonight and Monday. As such, will maintain unstable air mass, with showers during that time.
Snow level holding at or above 6000 ft today, then lowering to 4000 ft overnight, and holding at 3500 to 4000 ft on Monday. But with precipitation more showery in nature, snowfall will be more variable.
That said, looks like 2 to 6 inches of new snow for the Cascades later tonight and Monday. Will not be enough to support any winter weather advisories, so will not issue such.

High pressure offshore will build inland late Monday night, and sit over the inland Pac NW on Tuesday. Lingering showers end Monday evening. Then, stable and cool air mass in place, with areas of fog expected Monday night into Tue am. As the high builds inland on Tue, will see light to moderate offshore flow develop. This will maintain dry weather, with seasonal temperatures. /Rockey

LONG TERM
WEDNESDAY THROUGH SATURDAY...Majority of WPC clusters remain in agreement on upper level ridging building over the Pacific NW lingers into Wed. However, does appear ridge not strong enough to completely block any incoming fronts. As such, GFS and ECMWF are showing a front pushing into the region later Wed and Wed night. Does not appear to be a soaker, as system is weakening as it approaches. Rainiest period appears to be Wed night. Afterwards, unsettled weather continues, with mix of clouds and sunshine, along with some showers. Snow level rather steady, holding at 4500 to 5000 ft for rest of next week. /Rockey

AVIATION
The warm front continues to push inland this morning which will bring light to moderate rain along with it. With gusty winds around 30-35 kt, and the rain, visibility will be impacted with MVFR and IFR VIS expected. Difficult to narrow down on exact timing due to the variable nature of both of those factors though, but will see subtle improvement after 18Z Sunday. LLWS likely, especially around KPDX and KTTD due to westerly flow aloft, and easterly flow at the surface. As the front shifts inland, showers will form behind it with colder air aloft. The showers will produce periods of gusty winds, but no other real impacts expected. Will see variable CIGs between MVFR to VFR levels but will trend around 1000 ft along the coast, and 2000-3000 ft inland. South of KUAO will trend more on the VFR side of the spectrum. Winds will shift to the west as well.

*KEUG currently is missing visibility observations between 06Z-15Z. Because of this, visibility forecast is influenced by area observations. *

PDX AND APPROACHES...MVFR through the next 24 hours with a 30-40% chance of IFR CIGs mixed into the forecast. Winds will ease in the post frontal environment but scattered showers will continue. LLWS through the early parts of the forecast due to westerly winds aloft. Current observations are putting those winds at around 35 kt. Will continue to monitor and omit from the forecast once winds at the surface shift westerly. No other concerns at this time. /Muessle

MARINE
Gale force winds persist over the waters with buoy 46050 gusting to around 40 kt, and the mouth to the Columbia River Bar seeing gusts up to 40 kt. Winds will slowly ease from north to south with the south-central waters holding onto the Gales for just a few more hours. As they ease, will see hazardous seas as the leading hazard. High pressure builds in Monday which will bring a period of much more settled weather. Seas of 12-16 ft at 13 seconds will ease to near 9 ft by early Monday morning. Seas will ease further on Tuesday. Winds will become 5-10 kt with gusts up to 15 kt early Monday, where they will remain through late Tuesday. /Muessle

PQR WATCHES/WARNINGS/ADVISORIES

OR
Flood Watch for today and this evening for
North Oregon Coast Coast Range of Northwest Oregon.

WA...Flood Watch for today for South Washington Coast Willapa Hills.

PZ...Small Craft Advisory until 3 PM PST this afternoon for Columbia River Bar.

Hazardous Seas Warning until 10 AM PST this morning for Coastal waters from Cape Shoalwater WA to Cape Falcon OR out 60 NM.

Hazardous Seas Warning until 1 PM PST this afternoon for Coastal

waters from Cape Falcon OR to Cape Foulweather OR out 60 NM.

Gale Warning until 4 AM PST early this morning for Coastal waters from Cape Foulweather to Florence OR out 10 NM- Waters from Cape Foulweather to Florence OR from 10 to 60 NM.

Hazardous Seas Warning until 1 PM PST this afternoon for Coastal

waters from Cape Foulweather to Florence OR out 10 NM- Waters from Cape Foulweather to Florence OR from 10 to 60 NM.

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Knappa
Click for Map
Sun -- 12:01 AM PST     6.62 feet High Tide
Sun -- 05:24 AM PST     Moonrise
Sun -- 05:46 AM PST     2.73 feet Low Tide
Sun -- 07:45 AM PST     Sunrise
Sun -- 11:18 AM PST     8.91 feet High Tide
Sun -- 02:41 PM PST     Moonset
Sun -- 04:28 PM PST     Sunset
Sun -- 07:01 PM PST     -0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Knappa, Knappa Slough, Columbia River, Oregon, Tide feet

Harrington Point
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Sun -- 05:24 AM PST     Moonrise
Sun -- 05:40 AM PST     2.98 feet Low Tide
Sun -- 07:46 AM PST     Sunrise
Sun -- 11:10 AM PST     8.38 feet High Tide
Sun -- 02:41 PM PST     Moonset
Sun -- 04:28 PM PST     Sunset
Sun -- 06:55 PM PST     -0.27 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Harrington Point, Columbia River, Washington, Tide feet

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