Sunrise 6:12 AM   Sunset 8:06 PM Moonrise 1:50 PM   Moonset 3:42 AM

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PZZ135 Puget Sound And Hood Canal- 307 Am Pdt Thu Apr 18 2024
Today - N wind 5 to 15 kt becoming 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. Tonight - N wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft. Fri - NE wind 5 to 15 kt. Wind waves 1 to 3 ft. Fri night - NE wind 5 to 15 kt. Wind waves 1 to 3 ft. Sat - NE wind 5 to 15 kt becoming S 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. Sat night - SW wind 15 to 25 kt. Wind waves 2 to 4 ft subsiding to 2 ft or less after midnight. Sun - S wind 15 to 25 kt becoming nw to 10 kt. Wind waves 1 ft or less. Mon - N wind to 10 kt. Wind waves 1 ft or less.

PZZ100 307 Am Pdt Thu Apr 18 2024
Synopsis for the northern and central washington coastal and inland waters - High pressure will continue to develop and move into the coastal waters today, which will interact with low pressure over land. High pressure will to dominate through the end of the week, with the next frontal system not expected until Saturday.

FXUS66 KSEW 181527 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 827 AM PDT Thu Apr 18 2024

SYNOPSIS
Dry upper level trough over the area through tonight.
Upper level ridge offshore Friday moving inland Friday night. Slow moving frontal system approaching the coast Saturday moving inland Saturday night. Upper level trough behind the front Sunday morning moving east Sunday afternoon. Weak upper level ridge over Western Washington Monday into Tuesday replaced by a weak upper level trough Tuesday night and Wednesday.

SHORT TERM /TODAY THROUGH SATURDAY/
Clear skies continue across the region with temperatures beginning to warm up into the 30s and low 40s. No updates to the forecast this morning. LH

Dry upper level trough over the area today with northerly flow aloft. Frost advisory for portions of the area has expired. With the upper level trough overhead temperatures aloft are not particularly warm so even with sunny skies all day highs will only be a couple of degrees above normal, in the upper 50s to mid 60s.

Trough shifts east tonight with a weak upper level ridge off the coast Friday. Low level flow turning offshore with the cross Cascade gradient down to -3 or 4 mb by Friday afternoon. This combined with the warming temperatures aloft will result in about 5 degrees of warming putting highs in the 60s and lower 70s. Lows tonight still on the cool side in the mid 30s to lower 40s with the colder locations getting down to near freezing.

Weak upper level ridge out ahead of the next frontal system moving into Western Washington Friday night and into Eastern Washington Saturday morning. Frontal system offshore becoming negatively tilted Saturday morning. This will slow down the eastward movement of the front. The front will be approaching from the southwest so there is a good chance that the Northwest Interior will be dry Saturday. For the remainder of the area rain likely along the coast with a chance of rain over the interior Saturday afternoon.
Low level flow staying offshore ahead of the front but the increase in cloud cover will knock a couple of degrees off the high temperatures Saturday with upper 50s to mid 60s in the forecast. Lows Saturday morning with some high clouds will be warmer, in the upper 30s to mid 40s.

Front moving through Saturday night with rain spreading over the area. Snow levels start out near 5000 feet dropping to around 3500 feet behind the front so little snow expected in the higher passes. There is a small pool of cool air aloft right behind the front, 500 mb temperatures -25 to -28C, so have included a chance of post frontal thunderstorms along the coast Sunday morning.

LONG TERM /SUNDAY THROUGH WEDNESDAY/
Extended models in good agreement with upper level trough behind the front moving through Western Washington Sunday morning making for a cool and showery day. Highs only in the lower to mid 50s. Weak upper level ridge Monday for a dry day. Northwesterly onshore flow Monday will keep highs near normal, mostly in the lower 60s.

Operational models in good agreement with a weak upper level trough approaching the coast Tuesday moving over the area Wednesday.
Model blend has some low pops Tuesday into Wednesday. Ensembles show just a few slightly wet solutions for Tuesday. Will back off the slight chance pops Tuesday and go with a dry forecast. With the trough over the area Wednesday will stay with the blend chance pops solution. Highs in the lower to mid 60s Tuesday cooling a little for Wednesday.

Felton

AVIATION
Northwesterly flow will continue as an upper level ridge builds to our west, with thermal troughing strengthening today along the coast. Winds at the surface will remain northerly through the TAF period, with flow turning easterly along the coast as the ridge moves over today. Inland terminals will remain northerly with some gusts in the afternoon. Wind gusts from 14 to 20 kt possible 20-03Z this afternoon.

KSEA...VFR and clear skies with northwesterly flow aloft and northeasterly flow at the surface between 6-8 kts. Winds will remain northerly through the TAF period, with gusty winds up to 15 to 20 kt Thursday afternoon, lasting potentially as long as 06Z.

Kristell/HPR

MARINE
An upper level ridge will continue to build offshore over the Pacific, and will move inland today. High pressure further inland combined with a surface trough along the coast will promote offshore flow with gusty east winds of 10 to 20 kt through the Strait of Juan de Fuca, into the northern offshore waters, and through the central Puget Sound. Winds in these areas look largely under SCA criteria, but a few gusts over 20 kt are possible through late tonight. The next frontal system is expected to cross the area waters Saturday with the next chances for widespread marine headlines.

Expect seas to remain around 3 to 6 ft through Saturday, then rising to 8 to 10 feet into Sunday.

Kristell/HPR

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

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...None.

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Lynch Cove Dock
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Thu -- 03:03 AM PDT     11.73 feet High Tide
Thu -- 04:42 AM PDT     Moonset
Thu -- 06:16 AM PDT     Sunrise
Thu -- 09:26 AM PDT     5.74 feet Low Tide
Thu -- 02:09 PM PDT     8.38 feet High Tide
Thu -- 02:49 PM PDT     Moonrise
Thu -- 08:06 PM PDT     Sunset
Thu -- 08:34 PM PDT     2.35 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Lynch Cove Dock, Washington, Tide feet

Colville Island
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Thu -- 12:54 AM PDT     1.10 knots Max Flood
Thu -- 04:18 AM PDT     -0.00 knots Slack
Thu -- 04:41 AM PDT     Moonset
Thu -- 06:15 AM PDT     Sunrise
Thu -- 07:14 AM PDT     -1.70 knots Max Ebb
Thu -- 01:55 PM PDT     -0.11 knots Min Ebb
Thu -- 02:49 PM PDT     Moonrise
Thu -- 06:19 PM PDT     -1.71 knots Max Ebb
Thu -- 08:05 PM PDT     Sunset
Thu -- 10:10 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Colville Island, 1 miles SSE of, Washington Current, knots

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