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PZZ110 Grays Harbor Bar- 901 Pm Pst Mon Nov 27 2023
combined seas 2 to 4 feet. Bar conditions light. Maximum ebb currents will occur 445 am Tuesday, 500 pm Tuesday, and 530 am Wednesday. The Tuesday afternoon ebb will be very strong.

PZZ100 901 Pm Pst Mon Nov 27 2023
Synopsis for the northern and central washington coastal and inland waters..High pressure continues over area waters into midweek with offshore flow lingering into Thursday. SEveral frontal systems bringing gusty winds and rain signals a more active weather pattern beginning later this week.

FXUS66 KSEW 280501 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 901 PM PST Mon Nov 27 2023

UPDATE
No changes have been made to the inherited forecast. The previous discussion remains below along with an updated marine/aviation section.

SYNOPSIS
Upper level ridging in the region will keep conditions dry and cool across western Washington through Tuesday. The ridge will dampen and move off to the east by midweek, which will open the door for a series of weather systems to move across the area late in the week and over the weekend.

SHORT TERM /TONIGHT THROUGH THURSDAY/
It is shaping up to be a rather quiet afternoon across western Washington. Latest satellite imagery does still show some low clouds and fog lingering across portions of Hood Canal and the south Sound into the South Interior this afternoon. Temperatures are trending mainly in the low to mid 40s, with a few spots still in the 30s in fog and low clouds down in Thurston and Lewis counties.

Overall, upper level ridging overhead will continue to produce cool and dry conditions tonight. The ridge will continue to influence the region on Tuesday, but will start to move to the south and east, as an upper level low approaches California. The ridge will then dampen on Wednesday as the low moves inland along the California coast. This will cause flow aloft to become split over western Washington which will start to open the door for a series of weather systems to move into the region Thursday and beyond.

Dry and cool conditions will persist through Wednesday. Can expect another round of fog and freezing fog to develop across portions of the interior overnight into Tuesday and again Tuesday into Wednesday. Overnight lows will remain cold and look to drop in the mid 20s to low 30s for the majority of the forecast area both mornings. Daytime highs will generally be in the low 40s to low 50s.

A pattern change commences on Thursday as the first in a series of systems moves into the region and brings the return of lowland rain and mountain snow. Overall QPF totals look rather light with this first system right now, with rainfall amounts generally expected to range between 0.20-0.45 inches for the coast and a couple hundredths of an inch to a tenth of an inch for the interior. Snow levels look to hover between 1500-2500 feet for some light snow, generally between 1-3 inches, at the passes.

LONG TERM /FRIDAY THROUGH MONDAY/
A wetter, more substantial system looks to impact the region Friday into Saturday. This looks to bring gusty winds to areas along the coast and across the Northern Interior (generally for areas from Whidbey Island northward). Western Washington will see rain for the lowlands and more substantial snow in the mountains. While QPF amounts will continue to be refined over the next few days, snow looks to peak Friday night into Saturday morning across the mountains with snow levels generally hovering between 2000-2500 feet. Those with pass travel planned over the weekend will want to make sure that they are staying up to date on the latest forecast information before heading out. A warmer system then looks to impact the region Sunday into Monday, for another round of gusty winds, lowland rain, and snow for the higher elevations of the mountains. Snow levels look to rise above the pass level by late Sunday. Active weather then looks to continue into early next week. 14



AVIATION
High pressure with northwesterly flow aloft will remain in place over W WA. Dense fog has been rapidly building back across the South Sound (including OLM), Chehalis Valley, and around KBFI.
Fog is also beginning to develop up the Kent Valley into BFI.
Temperatures are beginning to drop below freezing, becoming a freezing fog threat. Fog is expected to build into the Puget Sound area terminals by around 06Z Tuesday and IFR to LIFR conditions will persist through 18-21Z, slowly returning to VFR. Surface winds remain very light, mostly variable but primarily north to northeast.
Another round of fog is expected to develop again Tuesday night into Wednesday.

KSEA...VFR conditions presently this evening. IFR to LIFR conditions in fog are likely to develop again tonight after around 06Z and last through Tuesday morning, slowly lifting from around 18-20Z. Very light winds, variable but primarily northeast to easterly winds 2 to 4 knots. Another round of fog is expected again Tuesday night into Wednesday morning.

LH

MARINE
High pressure will remain across the Pacific Northwest into midweek with low level offshore flow lingering into Thursday. Areas of dense fog that have persisted throughout the day today have begun to build back over the southern Puget Sound and Hood Canal, prompting the issuance of a Dense Fog Advisory. Further evolution of fog will be monitored as fog is beginning to filter through the Strait of Georgia north of the San Juans and into the Strait of Juan de Fuca. Fog will slowly evaporate Tuesday morning, then another round is expected Tuesday night into Wednesday morning.

Some breezy east winds are currently being observed at Buoy 87 in the West Entrance to the Strait of Juan de Fuca and coastal waters, however wind speeds should remain below SCA criteria.

A more active weather pattern to expected to begin to affect area waters Thursday and into the weekend with several frontal systems bringing increasing southerly winds. Seas 5 to 6 feet will subside somewhat Tuesday through Wednesday 3 to 4 feet then build late week to over 10 ft with the aforementioned weather systems moving across the area.

LH/Wolcott



HYDROLOGY
With the upcoming pattern change suggesting more rain in the forecast, area rivers are likely to see rises through the weekend. This will continue to be monitored and appropriate hydrologic products will be issued as confidence grows in the rainfall forecast.



SEW WATCHES/WARNINGS/ADVISORIES
WA...Freezing Fog Advisory until 10 AM PST Tuesday for Bremerton and Vicinity-Hood Canal Area-Southwest Interior-Tacoma Area- Western Whatcom County.

PZ...Dense Fog Advisory until 10 AM PST Tuesday for Northern Inland Waters Including The San Juan Islands-Puget Sound and Hood Canal.

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Cosmopolis
Click for Map
Tue -- 02:10 AM PST     10.04 feet High Tide
Tue -- 07:21 AM PST     3.99 feet Low Tide
Tue -- 07:36 AM PST     Sunrise
Tue -- 09:28 AM PST     Moonset
Tue -- 01:20 PM PST     12.22 feet High Tide
Tue -- 04:29 PM PST     Sunset
Tue -- 05:12 PM PST     Moonrise
Tue -- 08:09 PM PST     -1.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Cosmopolis, Chehalis River, Grays Harbor, Washington, Tide feet

Grays Harbor Entrance
Click for Map
Tue -- 02:00 AM PST     -0.01 knots Slack
Tue -- 04:46 AM PST     -2.11 knots Max Ebb
Tue -- 07:18 AM PST     0.00 knots Slack
Tue -- 07:37 AM PST     Sunrise
Tue -- 09:29 AM PST     Moonset
Tue -- 10:15 AM PST     2.01 knots Max Flood
Tue -- 01:09 PM PST     -0.00 knots Slack
Tue -- 04:30 PM PST     Sunset
Tue -- 04:56 PM PST     -4.12 knots Max Ebb
Tue -- 05:14 PM PST     Moonrise
Tue -- 08:27 PM PST     0.01 knots Slack
Tue -- 11:47 PM PST     2.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION

Grays Harbor Entrance, Washington Current, knots

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