Sunrise 6:05 AM   Sunset 8:08 PM Moonrise 3:56 PM   Moonset 4:07 AM

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PZZ134 Admiralty Inlet- 215 Am Pdt Sat Apr 20 2024
Today - E wind to 10 kt becoming se 10 to 20 kt in the afternoon. Wind waves 1 ft or less building to 1 to 3 ft in the afternoon. Tonight - SW wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 2 ft or less after midnight. Sun - S wind to 10 kt becoming sw in the afternoon. Wind waves 1 ft or less. Sun night - NW wind 15 to 25 kt. Wind waves 2 to 4 ft. Mon - NW wind to 10 kt rising to 10 to 20 kt in the afternoon. Wind waves 1 ft or less building to 1 to 3 ft in the afternoon. Mon night - NW wind 10 to 20 kt easing to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less after midnight. Tue - NW wind to 10 kt. Wind waves 1 ft or less. Wed - S wind to 10 kt becoming w. Wind waves 1 ft or less.

PZZ100 215 Am Pdt Sat Apr 20 2024
Synopsis for the northern and central washington coastal and inland waters - Offshore flow this morning before turning onshore later this afternoon with the arrival of a front. Seas will rise as the low pressure system moves inland, contributing to steeper waves. Additional marine headlines are expected over the weekend as a westerly surge moves through the strait of juan de fuca.

FXUS66 KSEW 201018 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 318 AM PDT Sat Apr 20 2024

SYNOPSIS
After a warm start to the day, a cold front will quickly traverse western Washington, bringing light rain and mountain snow along with breezy conditions. Scattered showers and light mountain snow continues into Sunday followed by drier weather into Monday and Tuesday as high pressure builds across the Pacific Northwest. Another quick-moving cold front looks to cross the region Wednesday followed by a more unsettled pattern into the latter portion of the week.

SHORT TERM /TODAY THROUGH MONDAY/
Main story in the short term forecast period will be the roller coaster temperature swing after another warm day today with highs nearing 70 to frost potential by Sunday night.

A cool morning across western Washington but temperatures will quickly warm this morning with highs inching towards 70 once again across the lowlands (50% chance in Seattle, lower elsewhere). A cold front will quickly cross the region late this afternoon and evening, bringing a rapid drop in temperatures from the upper 60s into the lower 50s and, eventually, the upper 40s by this evening.
Light rain and mountain snow will accompany this front, though it will encounter the very dry airmass that is over the region, resulting in only light precipitation totals. The quick 2-3 hour bout of stratiform rain will give way to scattered showers this evening behind the front, which will linger through much of the day Sunday. Rainfall totals through Sunday will only measure to a few hundredths of an inch over most of the lowlands, with the highest totals of up to half an inch over western Whatcom and Skagit Counties. Snow levels drop to around 2500 feet tonight, but snowfall totals remain low with this moisture-starved, quick- hitting system. Probabilities for at least 2 inches of snow through Sunday night are only 20-30% at Stevens and Snoqualmie Passes. Highest snowfall totals will stay confined to the North Cascades with totals nearing a foot above 6000 feet in these areas.

Breezy conditions will develop later this morning into this afternoon as southwesterly flow overtakes the region along and ahead of the incoming cold front. Occasional wind gusts over 30 mph will be possible in the 2-9 pm timeframe with at least 60% confidence in gusts of at least 30 mph over much of the lowlands.

Mesoscale models are continuing to suggest convergence banding will form late Sunday into Sunday night across King and Snohomish Counties, which could increase snowfall totals, though confidence on where these form and for how long remain unclear at this time.
Confidence is higher for additional light accumulations Sunday afternoon and evening at Stevens Pass. Otherwise, much cooler Sunday with highs in the upper 50s inland and low 50s along the coast.

We continue to monitor the potential for frost formation into Monday morning as skies clear and winds ease into Sunday night.
Greatest threat looks to be across the Southwest Interior and across the East Puget Sound Lowlands. High temperatures begin to rebound, however, as surface high pressure and mid-level ridging quickly build eastward across the region. Highs creep back closer to 60, with mid 60s across the Southwest Interior.

LONG TERM /TUESDAY THROUGH FRIDAY/
Ensemble solutions appear supportive of a progressive weather pattern through Wednesday.
Tuesday continues to look dry and mild as high pressure builds across Washington with highs in the upper 60s. Our next frontal system looks to quickly move onshore by Tuesday evening with chances for light showers and mountain snow. Long range ensembles deepen longwave troughing across the Pacific Northwest Thursday into Friday, though to varying degrees of amplitude, leading to modest uncertainty in forecast high temperatures Wednesday through Friday. Overall consensus with this broad troughing suggests cooler and wetter conditions, with highs near to slightly below normal for late April.

Davis

AVIATION
NW flow aloft will turn more from the SW this afternoon as an upper-ridge shift east of the Cascades. High-level moisture will increase as the day progresses due in part to an incoming front. As precipitation spreads onshore from the aforementioned front, MVFR cigs are possible for KHQM. However, mostly VFR should remain throughout the TAF period for most airfields. Low level easterly flow will quickly snap onshore with the arrival of the front. Gusty post-frontal W/SW surface winds are expected across much of the area Saturday afternoon and evening before decreasing overnight. More VFR conditions are expected for Sunday as high pressure builds.

KSEA...VFR observed over the terminal currently. That trend should last throughout much of the upcoming TAF period. A front is expected to reach the coast this afternoon with areas of light precip arriving at the terminal after 00Z, but ceilings likely remaining above MVFR thresholds. E surface winds will reverse to S/SW around 20Z on Saturday and remain gusty well into Saturday evening. Gusts up to 25-30 kt are possible before decreasing overnight.

McMillian

MARINE
High pressure continues across much of PNW. However, the next weather maker looms offshore around 130 W as of this morning.
Offshore flow at the surface currently but as a front enters, we'll see a sharp snap back to onshore flow across area waters. Because of this, Small Craft Advisories will begin later this morning for the coastal waters before spreading to inland water zones (central and east strait, Puget Sound) as the day progresses before winds weaken overnight. High pressure will then return Sunday afternoon into the beginning of next week, with a few pushes of westerly winds down the Strait of Juan de Fuca which will likely require additional headlines.

Seas currently 2 to 4 feet but will rise to 8 to 12 feet this evening through Sunday morning before decreasing to 6 to 8 feet by Sunday evening.

McMillian

HYDROLOGY
No river flooding is expected over the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
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-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 5 PM this afternoon to 11 PM PDT this evening for East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 2 PM this afternoon to 11 PM PDT this evening for Puget Sound and Hood Canal.

Small Craft Advisory from 11 AM this morning to 11 PM PDT this evening for Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm.

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Marysville
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Sat -- 04:10 AM PDT     10.27 feet High Tide
Sat -- 05:09 AM PDT     Moonset
Sat -- 06:08 AM PDT     Sunrise
Sat -- 10:49 AM PDT     2.94 feet Low Tide
Sat -- 04:25 PM PDT     8.40 feet High Tide
Sat -- 04:58 PM PDT     Moonrise
Sat -- 08:07 PM PDT     Sunset
Sat -- 10:28 PM PDT     2.88 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Marysville, Quilceda Creek, Washington, Tide feet

Stanwood
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Sat -- 04:24 AM PDT     6.70 feet High Tide
Sat -- 05:10 AM PDT     Moonset
Sat -- 06:08 AM PDT     Sunrise
Sat -- 12:34 PM PDT     0.96 feet Low Tide
Sat -- 04:39 PM PDT     5.48 feet High Tide
Sat -- 04:59 PM PDT     Moonrise
Sat -- 08:08 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Stanwood, Washington, Tide feet

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