Sunrise 5:21 AM   Sunset 8:56 PM Moonrise 4:04 PM   Moonset 2:45 AM

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PZZ133 Northern Inland Waters Including The San Juan Islands- 215 Am Pdt Sun May 19 2024
Today - W wind to 10 kt in the morning becoming light. Wind waves 1 ft or less in the morning becoming less than 1 ft. Tonight - SW wind to 10 kt. Wind waves 1 ft or less. Mon - Light wind. Wind waves less than 1 ft. Mon night - SW wind to 10 kt becoming 5 to 15 kt after midnight. Wind waves 2 ft or less. Tue - S wind 5 to 15 kt. Wind waves 2 ft or less. Tue night - S wind 5 to 15 kt becoming W after midnight. Wind waves 2 ft or less. Wed - SW wind to 10 kt. Wind waves 1 ft or less. Thu - S wind to 10 kt. Wind waves 1 ft or less.

PZZ100 215 Am Pdt Sun May 19 2024
Synopsis for the northern and central washington coastal and inland waters - Broad surface ridging will remain centered well offshore with low pressure inland and will result in onshore flow for much of this weekend into early next week. A frontal system looks to traverse the area waters on Tuesday.

FXUS66 KSEW 191622 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 922 AM PDT Sun May 19 2024

SYNOPSIS
An upper level trough will move east of the region this afternoon and a weak upper level ridge will give drier and somewhat warmer conditions on Monday. Another trough will arrive on Tuesday for a return to cool and unsettled conditions that will persist for much of the coming week.

SHORT TERM /TODAY THROUGH TUESDAY/
Radar shows showers continuing across the north and central Sound and portions of the Cascades this morning, but these are expected to wind down through the day as an upper trough axis shifts further eastward and low level onshore flow relaxes somewhat. Forecast largely remains on track this morning, with only a few updates made to the POPs to account for current radar trends. The previous discussion follows below, with updates made to the aviation and marine sections. 14

Northerly flow aloft on the backside of the trough will lead to drier conditions by afternoon along with gradually clearing skies toward this evening. With a little additional sunshine, high temperatures will edge upward a few degrees...though remaining below seasonal norms.

Weak upper ridging briefly noses into the region tonight into Monday for a short-lived drying trend. High temperatures will approach near normal levels for what could be the only day this week. By Monday night, the next in a series of a troughs will dig southward out of British Columbia and rain will spread across the area Tuesday morning. This system continues to look on the wet side for late May with much of the lowlands likely to pick up between a half inch to an inch of rainfall and 1 to 3 inches in the Cascades. Accordingly, temperatures will be knocked down to well below seasonal levels.

LONG TERM /WEDNESDAY THROUGH SATURDAY/
An upper level trough will progress southeastward across the area on Wednesday maintaining cool and showery conditions across Western Washington.
Looking toward the later half of the week, it seems that we'll be stuck in much the same pattern as recent days. Model ensembles maintain a mean ridge position well offshore with broad troughing over the Western US. Look for additional systems to dip southward out of British Columbia that will keep shower chances in the forecast and temperatures below normal until further notice. 27

AVIATION
Flow aloft is north/northwesterly today with an upper level trough over the region. A few light showers remain across the Pacific coast, the north interior, and the remnants of a convergence zone east of Seattle. Ceilings are VFR except MVFR through the central Puget Sound around the Seattle terminals in association with the decaying convergence zone. Showers will mostly linger over the Cascades this afternoon and there's a slight chance of thunderstorms over the North Cascades. A return to widespread VFR conditions is expected going into this afternoon with diminishing cloud cover over the terminals. Showers will diminish tonight as the trough shifts farther east. A few patches of fog cannot be ruled out tomorrow morning.

KSEA...Lingering MVFR ceilings this morning in association with a decaying convergence zone. Winds S around 5 kt becoming more W to NW around 21z this afternoon (with drier conditions and a return to VFR ceilings). A return to light southerly winds and partly cloudy (VFR)
skies tonight.

LH

MARINE
High pressure over the NE Pacific will maintain onshore flow across western WA this week. Highest wind and waves will be through the Strait of Juan de Fuca and outer Coastal Waters - Small Craft Advisories are in effect. A frontal system will cross the waters on Tuesday with another (weak) system on Friday. Waves may become steep with short period waves dominating.

33/LH

HYDROLOGY
The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated as needed.

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory until 5 AM PDT Monday 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 James Island To Point Grenville 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-East Entrance U.S. Waters Strait Of Juan De Fuca.

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Tsawwassen
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Sun -- 03:07 AM PDT     13.04 feet High Tide
Sun -- 03:45 AM PDT     Moonset
Sun -- 05:24 AM PDT     Sunrise
Sun -- 10:09 AM PDT     5.95 feet Low Tide
Sun -- 04:59 PM PDT     11.70 feet High Tide
Sun -- 05:04 PM PDT     Moonrise
Sun -- 08:54 PM PDT     Sunset
Sun -- 09:39 PM PDT     9.57 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Tsawwassen, British Columbia, Tide feet

Boat Passage
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Sun -- 01:47 AM PDT     -0.01 knots Slack
Sun -- 03:45 AM PDT     Moonset
Sun -- 05:20 AM PDT     -3.69 knots Max Ebb
Sun -- 05:25 AM PDT     Sunrise
Sun -- 08:36 AM PDT     0.01 knots Slack
Sun -- 11:46 AM PDT     3.32 knots Max Flood
Sun -- 03:17 PM PDT     -0.00 knots Slack
Sun -- 05:04 PM PDT     Moonrise
Sun -- 06:00 PM PDT     -2.30 knots Max Ebb
Sun -- 08:45 PM PDT     0.01 knots Slack
Sun -- 08:53 PM PDT     Sunset
Sun -- 11:32 PM PDT     2.31 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION

Boat Passage, British Columbia Current, knots

Full Color Weather Map

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