Marine Weather and Tide Forecast for Central Park, WA

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7 Day Forecast for Marine Location Near Central Park, WA

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Area Discussion for - Seattle, WA

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FXUS66 KSEW 081647 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 947 AM PDT Thu Jun 8 2023

UPDATE
Everything is going according to plan here in this scheduled update. Temperatures are currently in the 50s across western Washington this morning with a few spots edging into the 60s. Marine layer stratus is very evident given latest satellite imagery. It's currently draped along the coast and into parts of the interior but should burn off as the day progresses. As mentioned below, cooler highs are in store compared to yesterday's but we'll still run a bit above average. The previous discussion remains below:

SYNOPSIS
Upper level ridging shifting eastward and will allow for onshore flow and cooler conditions today. Trough influence returns by the end of the week, spreading some moisture back into the area and increasing rain chances to at least the mountains and into the Puget Sound Lowlands. Warm and dry weather then looks to return next week.

SHORT TERM /TODAY THROUGH SATURDAY/
A weak onshore push will bring some relief from the heat today although temperatures will still run a few degrees warmer the average, especially in the interior. Highs in the interior will be mostly in the mid to upper 70s. The coast will be cooler and cloudier with highs in the 60s.
The Fire Weather threat will be lower with an increase in RH values. There is a slight chance of showers in the Cascades tonight as moisture spreads north into western WA. The north Cascades may see a slight chance of thunderstorms too near the crest, although confidence is low. The best chance for thunderstorms will be over eastern WA.

Friday will be cooler overall with highs in the 60s. There is a chance of showers in the interior and Cascades as moisture continues to spread north and west into the region (mainly during the morning and early afternoon). Lowland rainfall totals are around a trace to 0.10" from Olympia to Seattle with up to 0.25" north to the border. If so, this will be the first measurable rain since May 22 for most areas.

The moisture feed gets cut off as we move toward Saturday. By then there is split flow with a low over CA and the jet to our north.
So we're back to more dry weather with temperatures a few degrees warmer than average. 33

LONG TERM /SUNDAY THROUGH WEDNESDAY/
High pressure nudges inland on Sunday and Monday and we'll see another bump is temperatures with highs in the lower to mid 80s. The coast will be cooler and in the 60s and 70s. Onshore flow increases on Tuesday behind a weak/splitting front. This will help knock temperatures down again and in the 60s and 70s across the board. A couple short-wave troughs clip through the area moving forward through the week but there's not much it terms of moisture and rain per ensemble guidance. 33

AVIATION
Light S-SE flow aloft with W-SW low level onshore flow.
Marine stratus that managed to work into the Central Puget Sound area will continue to lift and scatter out this morning and afternoon, except along the coast where the onshore flow will make it tough to fully improve through the afternoon and evening.
Strengthening low level onshore flow will bring more widespread stratus to the interior through Friday morning. Ceilings are likely to vary with a 60-80% chance of ceilings below 3000 feet along the coast into the South Kitsap Peninsula. For much of the remaining interior, including the metro terminals - it looks like a 30-40% chance at sling's lower than 3000 ft. Ceilings will lift through Friday morning eventually becoming VFR by early afternoon. Low level S-SW winds this afternoon in the 8-10kt range will ease early Friday morning. The only exception will be a period of NW winds in the north Puget Sound area including KPAE early this evening with the typical diurnally enhanced onshore push. Winds will ease there overnight perhaps even becoming light E-NE after 06z.

KSEA
VFR conditions today with increasing high level clouds building from the south. Stronger onshore flow will bring a better chance of stratus overnight into Friday morning. The most likely scenario is ceilings 3000-5000 ft, but there is 30% chance of ceilings below 2000 feet through around 15z Friday morning.
Southwest winds from 8-10 kt will likely linger through around 06z before easing to 5-7kt after 06z.

MARINE
Broad high pressure along the coast will continue to slide southward as an upper low migrates northward across eastern Oregon and Washington through Friday. Southerly reversal flow along the coast continues to promote stratus and patchy and locally dense fog through this morning. The first push down the Strait of Juan de Fuca will wrap up this morning with a brief break before a stronger push begins late this afternoon. Held off on any Gale Warnings at this point with probabilities still mostly 30% or less. Brief gale-force gusts may occur, especially within the central Strait tonight, however. Seas will range from 3-5 feet over the coastal waters through Friday.

A weak cold front dissipates over the region as an upper low moves northward to our east Saturday, with advisory level gusts possible for the offshore waters. Larger northwesterly swell looks to arrive Tuesday into Wednesday next week with combined seas from 10 to 12 feet.

Davis

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 from 2 PM this afternoon to 8 AM PDT Friday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

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Weather Reporting Stations

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Wind History for Westport, WA

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Airport Reports

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Link to 5 minute data for KHQM

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Wind History from HQM (wind in knots)

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Tide / Current Tables for Cosmopolis, Chehalis River, Grays Harbor, Washington

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