Sunrise 5:58 AM   Sunset 8:19 PM Moonrise 12:00 AM   Moonset 7:36 AM

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PZZ210 Columbia River Bar- 157 Pm Pdt Sat Apr 27 2024
.small craft advisory in effect until 8 pm pdt this evening - .
In the main channel -
General seas - 6 to 8 ft building to 8 to 9 ft Sunday evening.
First ebb - Ebb current of 2.7 kt at 742 pm Saturday. Seas 7 ft.
SEcond ebb - Ebb current of 5.44 kt at 751 am Sunday. Seas 6 to 7 ft.
Third ebb - Ebb current of 2.4 kt at 830 pm Sunday. Seas 8 ft.

PZZ200 157 Pm Pdt Sat Apr 27 2024
Synopsis for the southern washington and northern oregon coast - Elevated wind and seas persist through this afternoon, resulting in steep and choppy seas at times. Gusty southwesterly winds becoming westerly and subsiding late this afternoon. Winds and seas slowly build Sunday afternoon as the next system moves into the region for the start of the upcoming week.

FXUS66 KSEW 280350 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 847 PM PDT Sat Apr 27 2024

SYNOPSIS
The active weather pattern will continue into early next week as a series of fronts pass through the region. Snow is expected in the passes Sunday night into Monday. A trend toward temperatures closer to normal and somewhat drier conditions is expected during the later half of the coming week.

SHORT TERM /TONIGHT THROUGH TUESDAY/
Latest satellite imagery shows W WA socked in with clouds as a weak front continues to slog through the area. Current radar does a good job showing the porous nature of this feature as echoes certainly represent a system passing through, even though activity is essentially on the scattered side. Models continue to support what radar loop is showing with the front essentially stalling out over the area for just long enough for the associated upper level trough to sweep into the area Sunday, keeping the forecast wet. Inherited forecast continues to handle this well and as such will not do a full rehash here. For additional forecast details, please refer to the Previous Discussion section below.

18

From Previous Discussion...Light precip continues to spread across the area this afternoon ahead of an occluded front that will dissipate as it moves onshore this evening. A few showers will linger over Western Washington overnight behind the front. An upper trough west of Haida Gwaii will dig southward into the region later Sunday into Monday for cool, showery conditions. The cooler temperatures aloft will destabilize the atmosphere enough for a slight chance of thunder as well as lower snow levels to most of the passes by Sunday night into Monday. Relatively warm ground temperatures may limit accumulations at Snoqualmie Pass.
Nonetheless, higher Steven Pass may accumulate somewhere in the range of 5 to 7 inches over a 12 hour period (06Z-18Z Monday).
Another shortwave arrives Monday night into Tuesday. The focus with the precip with that system may be a little further south...perhaps mainly the southern half of the CWA

LONG TERM /WEDNESDAY THROUGH SATURDAY/
Deterministic model runs have shown little to no run-to-run consistency for the long term forecast over the past couple of days. And this meshes well with the high degree of uncertainty expressed by the NBM during that time period. There's increasing confidence that we'll see a short break in the weather on Wednesday, but the forecast picture becomes increasingly murky Thursday through Saturday. Despite the fact that deterministic runs of the GFS/Euro have flipped from earlier solutions, some of the ensemble means (the Euro in particular)
maintain some positive height anomalies late next week. Current forecasts for late next week look awfully close to climatological norms...and that's probably not a bad approximation at this time.

27

AVIATION
West-southwest flow aloft continues this evening with a mixed bag of flight conditions as the front continues to advance inland across Western Washington. Expect gusty surface winds and lower ceilings across most of the area as the front approaches, with a shift to west/southwest winds behind the front. Lower ceilings and rain remain the story overnight, with some improvement in conditions through the day Sunday as the rain transitions to showers in the post-frontal air mass. Can't rule out an isolated thunderstorm or two late in the period, after 00z Mon, but confidence too low for inclusion at this time.

KSEA...Steady rain and gusty winds ahead of the approaching front through the evening. Expect steady rain to transition to showers by daybreak Sunday behind the front, with ceilings gradually trending lifting through the day. However, surface winds likely to remain gusty through the period. Isolated thunderstorm possible near terminal after 00z Mon, but confidence remains low.

MARINE
The strongest winds over the coastal waters have eased this evening as the front is pushing onshore. However, the seas remain steep and as a result have extended the small craft advisories for the coastal waters into the overnight period. Expect seas to gradually ease and dominant period to again lengthen as the locally generated short-period waves fade away. Elsewhere, will maintain the advisories with southerlies ahead of the front over parts of the interior, followed by a strong west push through the Strait of Juan de Fuca.

Marginal wind gusts to SCA thresholds possible Sunday afternoon (35% chance) over the offshore waters with another round of Small Craft Advisories likely through the Strait with another afternoon push and possibly through the beginning of next week. Expect combined seas to build to near 10 feet Sunday night and Monday, before subsiding through the early part of next week.

HYDROLOGY
No river flooding is expected over the next seven days.

SEW WATCHES/WARNINGS/ADVISORIES
WA...Winter Weather Advisory from 11 PM Sunday to 11 AM PDT Monday for West Slopes North Cascades and Passes-West Slopes North Central Cascades and Passes-West Slopes South Central Cascades and Passes.

PZ...Small Craft Advisory until 5 AM PDT Sunday for Central U.S.
Waters Strait Of Juan De Fuca-Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From Cape Flattery To James Island Out 10 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm-East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 11 PM PDT this evening for Admiralty Inlet-Northern Inland Waters Including The San Juan Islands.

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Olympia
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Sun -- 01:04 AM PDT     Moonrise
Sun -- 03:35 AM PDT     8.15 feet Low Tide
Sun -- 05:59 AM PDT     Sunrise
Sun -- 07:45 AM PDT     12.75 feet High Tide
Sun -- 08:34 AM PDT     Moonset
Sun -- 03:35 PM PDT     -1.47 feet Low Tide
Sun -- 08:19 PM PDT     Sunset
Sun -- 11:10 PM PDT     14.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Olympia, Washington, Tide feet

Nisqually Reach
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Sun -- 01:03 AM PDT     Moonrise
Sun -- 01:07 AM PDT     -0.73 knots Max Ebb
Sun -- 04:28 AM PDT     0.00 knots Slack
Sun -- 05:58 AM PDT     Sunrise
Sun -- 06:38 AM PDT     0.45 knots Max Flood
Sun -- 08:13 AM PDT     -0.00 knots Slack
Sun -- 08:33 AM PDT     Moonset
Sun -- 12:27 PM PDT     -1.41 knots Max Ebb
Sun -- 03:59 PM PDT     0.00 knots Slack
Sun -- 07:27 PM PDT     1.28 knots Max Flood
Sun -- 08:18 PM PDT     Sunset
Sun -- 11:01 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Nisqually Reach, Washington Current, knots

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