Sunrise 5:57 AM   Sunset 8:32 PM Moonrise 12:27 AM   Moonset 7:25 AM

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PZZ130 West Entrance U.s. Waters Strait Of Juan De Fuca- 318 Pm Pdt Sun Apr 28 2024
Tonight - W wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft. W swell 7 ft at 10 seconds. Mon - W wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 7 ft at 10 seconds subsiding to 5 to 6 ft at 10 seconds in the afternoon. Mon night - SW wind 5 to 15 kt becoming se to 10 kt after midnight. Wind waves 2 ft or less. W swell 5 to 6 ft at 11 seconds becoming 3 to 7 ft at 11 seconds after midnight. Tue - NE wind to 10 kt becoming nw in the afternoon. Wind waves 1 ft or less. W swell 7 ft at 11 seconds. Tue night - W wind 15 to 25 kt easing to 10 kt after midnight. Wind waves 2 to 4 ft subsiding to 1 ft after midnight. W swell 7 ft at 10 seconds. Wed - SW wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less. W swell 3 ft at 9 seconds. Wed night - SW wind 10 to 20 kt becoming se to 10 kt after midnight. Wind waves 1 to 3 ft. W swell 5 ft at 8 seconds. Thu - SE wind to 10 kt becoming sw. Wind waves 1 ft or less. NW swell 1 to 4 ft becoming W 3 ft. Fri - E wind to 10 kt. Wind waves 1 ft or less. W swell 2 ft.

PZZ100 318 Pm Pdt Sun Apr 28 2024
Synopsis for the northern and central washington coastal and inland waters - Unsettled weather continues into the evening. The next frontal system will move across the region Monday night into Tuesday with weak high pressure building across the region Tuesday and Wednesday. But conditions are to turn active again around Thursday and possibly into the weekend.

FXUS66 KSEW 290355 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 858 PM PDT Sun Apr 28 2024

SYNOPSIS
Unsettled, cool weather continues with a series of frontal systems crossing the region through the middle of the week. A brief warming and drying is expected midweek before conditions turn unsettled again late week.

SHORT TERM /TONIGHT THROUGH WEDNESDAY/
Showers associated with an upper level trough over the area continue as per latest radar loop.
The strongest echoes are occurring over portions of the north Sound as well as western Skagit and Snohomish counties. Current IR satellite imagery does an excellent job of highlighting the PSCZ nature of this increased activity. What will be interesting to see is how precip amounts will be impacted as this feature starts to bleed eastward over the Cascades. The timing for this still seems to be on track with the overnight hours and thusly falling under the purview of the inherited Winter Weather Advisory...which, having said all this...looks to be in good shape with no need for alteration or updating.

Soggy though it may be, forecast is holding true and as such no need for any evening updates to public products at this time. For additional forecast details, please refer to the Previous Discussion section below.

From Previous Discussion...Scattered showers continue to spread onshore across Western Washington this afternoon as an upper trough west of Haida Gwaii digs southward toward the region. Cooling temperatures aloft will lead to increasing instability late today into Monday for a chance of thunderstorms as well as snow levels dipping to most pass levels late tonight. A Winter Weather Advisory continues for the Cascades above 3500 feet late tonight into Monday morning. Another upper trough digs southward across the area Monday night into early Tuesday. The focus with that system continues to be a bit further southward...with much of the QPF from the Seattle area southward.

The trough axis shifts east of the area by late Tuesday afternoon as drier north-northwest flow aloft develops ahead of a weak upper ridge offshore. As things presently stand, Wednesday is shaping up to be one of the nicest days of the week as weak ridging aloft leads to mostly dry conditions, some sunshine, and high temperatures bouncing back to near seasonal norms.

LONG TERM /THURSDAY THROUGH SUNDAY/
From Previous Discussion...The woes of deciphering the extended portion of the forecast continue. There is general agreement that another upper trough crossing southern British Columbia on Thursday will bring a returning chance of showers. Uncertainty in the forecast for Friday into next weekend increases by the day. The Euro ensembles favor additional troughing and cool temperatures while the more optimistic GFS ensemble mean has weak upper ridging and temperatures climbing a little above normal. The NBM 10th and 90th percentile high temperature forecasts have a 10 to 15 degree spread by Friday and Saturday. Given these levels of uncertainty, near climo temps and a generic chance of showers forecast late in the week is the best forecast at this stage. 27

AVIATION
An upper trough continues to advance across the region, maintaining onshore low-level flow and fairly widespread showers. Gusty surface winds continue around many area terminals, and expect this to continue in the unstable and showery pattern tonight through early Monday. Expect a lingering convergence zone across southern Snohomish County to fade out, and unlikely to reach the primary King County terminals. Ceilings likely to remain a mix overnight, with areas under showers (or persistent clearing) likely to dip lower into the low MVFR or locally IFR range, while most remaining in MVFR or low VFR through the balance of the night. Trend back to VFR conditions likely again tomorrow with again scattered showers and gusty surface winds.

KSEA...Expect continued VFR ceilings and southerly surface winds this evening with any convergence remaining focused well north of the terminal. Showers will remain over/near the terminal area overnight with gusty southerly surface winds. Guidance suggest settling to MVFR again overnight through around daybreak, but a return to VFR on Monday through the day.

MARINE
Yet another disturbance continues to maintain gusty advisory strength winds through the central and eastern Strait of Juan de Fuca and into the adjacent interior waters this evening.
Meanwhile, seas holding around 9 to 10 ft with a dominant period around 10 seconds will maintain rather steep conditions over the coastal waters tonight. While winds are expected to gradually trend down, the potential for localized gusts to 25-30 kt under strong showers or isolated thunderstorms will continue into Monday. Another front arrives Monday night into Tuesday for another round of more widespread advisory strength winds. Seas across the coastal waters will generally remain near or just below 10 ft through the next couple of days, before subsiding more significantly toward midweek.

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



SEW WATCHES/WARNINGS/ADVISORIES
WA...Winter Weather Advisory from 11 PM this evening 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 Monday for Central U.S.
Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

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

Small Craft Advisory until 8 PM PDT this evening for Puget Sound and Hood Canal.

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Hornby Island
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Sun -- 01:27 AM PDT     Moonrise
Sun -- 03:48 AM PDT     3.77 meters Low Tide
Sun -- 06:00 AM PDT     Sunrise
Sun -- 07:34 AM PDT     4.09 meters High Tide
Sun -- 08:25 AM PDT     Moonset
Sun -- 03:31 PM PDT     0.93 meters Low Tide
Sun -- 08:32 PM PDT     Sunset
Sun -- 11:33 PM PDT     4.70 meters High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Hornby Island, British Columbia (2), Tide feet

Denman Island
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Sun -- 01:28 AM PDT     Moonrise
Sun -- 03:24 AM PDT     3.76 meters Low Tide
Sun -- 06:00 AM PDT     Sunrise
Sun -- 07:45 AM PDT     4.30 meters High Tide
Sun -- 08:25 AM PDT     Moonset
Sun -- 03:20 PM PDT     1.05 meters Low Tide
Sun -- 08:33 PM PDT     Sunset
Sun -- 11:16 PM PDT     4.72 meters High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Denman Island, British Columbia (2), Tide feet

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