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PZZ210 Columbia River Bar- 104 Pm Pst Sun Dec 10 2023
.small craft advisory in effect until 5 pm pst this afternoon...
In the main channel..
General seas..10 ft subsiding to 6 ft Monday afternoon.
First ebb..Strong ebb current of 5.63 kt at 242 pm Sunday. Seas 11 ft.
SEcond ebb..Ebb current of 2.9 kt at 308 am Monday. Seas 7 ft.
Third ebb..Strong ebb current of 6.12 kt at 320 pm Monday. Seas 7 ft.

PZZ200 104 Pm Pst Sun Dec 10 2023
Synopsis for the southern washington and northern oregon coast.. Decreasing winds and seas as high pressure builds over the area through mid-week. Front to move across the waters late Wednesday.

FXUS66 KPQR 110524 AAA AFDPQR

Area Forecast Discussion National Weather Service Portland OR 925 PM PST Sun Dec 10 2023

Updated aviation discussion

SYNOPSIS
Rain will continue to diminish across the south this evening, with scattered showers lingering into Monday morning in the wake of a front. Weather trends drier with mild temperatures for much of the coming week, although a front will bring a chance for light rain late Wednesday into Thursday.

DISCUSSION
Radar imagery shows rain focused along a line extending from the north Oregon Cascades through the south Willamette Valley to near Florence this afternoon as a weakening atmospheric river continues to shift south across the area.
Rain has tapered off to scattered showers across northern portions of the area, allowing earlier Flood Watches to come to end across the Willapa Hills and north Oregon Coast Range as rivers there have crested below flood stage as of early afternoon. Do not anticipate any additional hydro concerns as rain continues to shift south and diminishes in intensity through this evening. A cold front currently extending southwestward from near the south Washington Coast through the Oregon coastal waters will push across the area this evening and bring steadier rain across the south to an end as precipitation fully tapers off to showers tonight in the post frontal environment. Snow levels will lower back towards the passes overnight which could result in a dusting of snow in parts of the High Cascades, but the showery nature of the precipitation and dwindling QPF amounts will preclude any more significant winter weather impacts. Elsewhere, partial clearing tonight combined with moist antecedent low level conditions could produce areas of fog in the interior valleys overnight into Monday morning.

Monday is looking mostly dry with the exception of some lingering shower activity along the Cascades as a weak shortwave trough traverses the region in northwest flow aloft, with most of the area seeing cloudy skies and mild December temps in the low 50s. The drying trend will be re-enforced by a ridge building in on Tuesday, likely yielding a few breaks of sunshine across the region Tuesday afternoon. Dry weather lingers through most of Wednesday before a weak front pushes across the region Wednesday night into Thursday. The majority of ensemble members are depicting at least some QPF with this feature, but amounts look to be limited to around a quarter to a half inch for coastal areas and a tenth or less elsewhere at this time. Wouldn't be surprised if guidance continues to trend drier in the coming days given low level offshore flow that will be in place ahead of the front. Models trend drier again into Friday as WPC ensemble clusters favor a blockier pattern with ridging over the western CONUS and a deep trough over the eastern Pacific. Precipitation chances look to increase next weekend as the trough makes slow progress towards the West Coast. /CB

AVIATION
The frontal band now sitting over central Oregon will continue to weaken tonight. West to northwest flow aloft persists through Monday. In the post frontal environment, fully saturated boundary layer with cooling temperatures expected to maintain widespread LIFR to IFR conditions across much of the area into Monday morning. Gradual improvement to MVFR likely by late Monday morning to early afternoon. Light winds turn northerly by Monday afternoon.

PDX AND APPROACHES...IFR CIGS expected tonight, with chances of IFR dropping to around 30% after 14Z Monday morning, as MVFR becomes more likely. Gradual improvement expected through Monday afternoon, with chances of VFR increasing to around 80-90% by 00Z Tuesday. Light winds becoming northwest in the morning. /DH

MARINE
Winds and seas continue to diminish across the coastal waters. A Small Craft Advisory remains through 10 PM tonight as seas will likely hover around 10 ft before dropping below overnight. High pressure builds in Monday which will bring a period of much more settled weather through Tuesday. A frontal system will move across the waters late Wednesday bringing sub- Gale conditions before returning to quiet weather late in the week.

PQR WATCHES/WARNINGS/ADVISORIES

OR
WA
None.
PZ...Small Craft Advisory until 10 PM PST this evening for Coastal waters from Cape Shoalwater WA to Florence OR out 60 NM.

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Vancouver
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Sun -- 12:36 AM PST     0.01 feet Low Tide
Sun -- 05:05 AM PST     1.30 feet High Tide
Sun -- 05:18 AM PST     Moonrise
Sun -- 07:40 AM PST     Sunrise
Sun -- 08:04 AM PST     1.02 feet Low Tide
Sun -- 09:29 AM PST     1.06 feet High Tide
Sun -- 12:34 PM PST     0.70 feet Low Tide
Sun -- 02:40 PM PST     Moonset
Sun -- 04:26 PM PST     Sunset
Sun -- 04:53 PM PST     1.98 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Vancouver, Columbia River, Washington (dubious accuracy), Tide feet

Knappa
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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

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