NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION. Privacy and Cookie policy

PZZ110 Grays Harbor Bar- 822 Pm Pst Thu Nov 30 2023
.small craft advisory in effect from 1 am pst Friday through late Friday night...
combined seas 5 to 7 feet building to 9 to 12 feet early Friday morning. Bar conditions light to moderate becoming rough Friday morning. Maximum ebb currents will occur at 700 am Friday, 700 pm Friday, and 745 am Saturday.

PZZ100 822 Pm Pst Thu Nov 30 2023
Synopsis for the northern and central washington coastal and inland waters..A series of frontal systems will make their way across the coastal waters from Friday through the beginning of next week, bringing a very active period with gusty winds and elevated seas.

FXUS66 KSEW 302329 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 329 PM PST Thu Nov 30 2023

SYNOPSIS
Active and potentially significant weather is expected to affect the area through the middle of next week.
Expect lowland rain and heavy mountain snow Friday and Saturday.
The pattern will begin to shift Saturday afternoon as the first of two atmospheric rivers moves into the area. The second atmospheric river Monday into Tuesday is expected to be an even stronger event with much higher snow levels, heavier rainfall, potential river flooding and breezy to windy conditions.

SHORT TERM /TONIGHT THROUGH SUNDAY/
Generally light precipitation will begin to pick up after midnight along the coast with the the second in a series of storm systems to affect the region. Snow levels will rise 2500 later this evening accumulations at Snoqualmie and Stevens Pass to build with around 3 to 5 inches by late tonight and ultimately up to 2 to 3 feet in the Cascades at pass elevations through early Sunday morning. Traveling through the passes will be difficult during this time. Accumulations are expected to be lower over the Olympics with around 12 inches possible through the same period. Along with the rain, and higher elevation snow, gusty winds could be possible along the coast and areas like Whidbey Island northward.
These are expected to fall in the 35 to 45 mph range especially Friday evening. There is a 10 to 20% chance that gusts to be 45 to 60 mph.

The pattern will shift late Saturday afternoon as a moderate atmospheric river begins to move into the area. This will bring much higher snow levels rising to well above 4000 feet by Sunday morning, and a plume of moisture supporting widespread moderate to heave precipitation - especially over the higher terrain. Rising snow levels will begin to limit snow to higher elevations. Heavier rain in the mountains and possibly some snowmelt will likely drive increasing impact to area rivers. Snow levels will continue to rise to well above 5500 feet by Sunday afternoon. The rainfall will likely be he heaviest in the Olympics and Cascades south of Skagit County by Sunday afternoon. This will drive rises on area rivers - especially those flowing from the Olympics and Cascades.


LONG TERM /MONDAY THROUGH THURSDAY/
Ensemble guidance, including ensemble based members continue to highlight the second atmospheric river pushing a swath of warm Pacific moisture in W WA, entering Monday into Wednesday. Guidance today has increased the potential for even heavier accumulations with this system - coupled with very high snow levels and rivers already running at elevated levels, confidence is increasing regarding the potential for multiple rivers reaching flood stage with this event and elevated hydrologic impacts.

AVIATION
Mix of MVFR and VFR across terminals this afternoon, as rain moves in from the southwest. Most of the MVFR was concentrated in south Puget Sound, Southwest Interior, and the Olympics with the heavier precipitation. As activity spreads eastward over the next few hours, expect ceilings to fall to MVFR across remaining east Puget Sound terminals through the evening hours. A couple areas may see lower areas down to IFR Friday morning, especially terminals close to Puget Sound waters. Ceilings are expected to remain MVFR on Friday. Flow aloft remains light out of the south through tonight, with stronger winds going into Friday and into Saturday as the front moves through. Surface winds remain south and westerly at around 5 kt through tonight, but will pick up to around 8 to 14 kt with gusts to 20 kt possible Friday afternoon and evening.

KSEA...Lower clouds beginning to fill in as rain approaches from the west. VFR through the afternoon hours, but MVFR ceilings may fill in as early as 02-04Z this evening. Generally expected to be MVFR through the TAF period (small possibility of low CIGs in the IFR category Friday morning from low Puget Sound stratus). Winds remain light through tonight out of the south at around 5 kt, but will pick up Friday with 8 to 12 kt sustained winds (and gusts to 20 kt possible).

HPR

MARINE
A weakening cold front has moves showers across the coastal waters, and is currently tracking through the inland waters.
Gusty winds of 15 to 30 kt sustained have been ongoing this afternoon in the coastal waters (small craft currently in effect will continue). A stronger increase of west swell (in addition to a stronger system approaching into Friday) will increase the magnitude of the winds for all waters for Friday morning, and Friday night into Saturday. Highest confidence of winds approaching gale criteria are in the coastal waters, and the eastern Strait of Juan de Fuca, with potential gusts up to 40 kt from the southeast Friday evening.
Small craft advisories will go into effect Thursday night through Friday evening for remaining inland waters and sections of the Strait of Juan de Fuca. Additional headlines will be needed as an atmospheric river sets up shop going into next week, with additional systems expected.

Seas will rise above 10 ft early Friday morning and remain in hazardous double digits until further notice.

HPR

HYDROLOGY
Increasingly wet storm systems will set the stage for a series of two atmospheric rivers expected to affect the region. The first Saturday evening into Sunday will bring moderate to heave precipitation to the region and snowlevels rising to well above 5500 feet Sunday. Precipitation amounts through the weekend are high enough to drive the Skokomish River to minor flood stage, as well as rises on all area rivers. The second, stronger atmospheric river Monday into Tuesday even higher snow levels well above 8000 feet by late Monday night. The second event following on the heals of the first will surely elevate the potential for more widespread and elevated hydrologic impacts, possibly affecting the region through much of next week. A hydrologic outlook remains in affect.



SEW WATCHES/WARNINGS/ADVISORIES
WA...Winter Weather Advisory from 4 AM Friday to 4 PM PST Saturday for Olympics.

Winter Storm Warning from 4 AM Friday to 4 AM PST Sunday for West Slopes North Cascades and Passes-West Slopes North Central Cascades and Passes-West Slopes South Central Cascades and Passes.

PZ...Small Craft Advisory from 1 AM Friday to 4 AM PST Saturday for Grays Harbor Bar.

Small Craft Advisory until 4 PM PST Friday for West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 2 AM to 4 PM PST Friday for Central U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 4 AM PST Friday for 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-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm-East Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Warning from 4 AM to 4 PM PST Friday for East Entrance U.S.
Waters Strait Of Juan De Fuca.

Small Craft Advisory until 10 PM PST Friday for Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory from 7 PM this evening to 4 PM PST Friday for Admiralty Inlet.

Small Craft Advisory from midnight tonight to 4 AM PST Saturday for Puget Sound and Hood Canal.

Gale Warning from 4 AM Friday to 1 AM PST Saturday for 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-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm.

toggle option: (graph/table)

Moon Island
Click for Map
Thu -- 03:26 AM PST     9.02 feet High Tide
Thu -- 07:39 AM PST     Sunrise
Thu -- 08:31 AM PST     4.37 feet Low Tide
Thu -- 11:17 AM PST     Moonset
Thu -- 02:22 PM PST     10.33 feet High Tide
Thu -- 04:29 PM PST     Sunset
Thu -- 07:13 PM PST     Moonrise
Thu -- 09:14 PM PST     -0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Moon Island, North Channel, Grays Harbor, Washington, Tide feet

Grays Harbor Entrance
Click for Map
Thu -- 12:25 AM PST     2.31 knots Max Flood
Thu -- 03:27 AM PST     -0.00 knots Slack
Thu -- 06:13 AM PST     -1.76 knots Max Ebb
Thu -- 07:39 AM PST     Sunrise
Thu -- 08:42 AM PST     0.00 knots Slack
Thu -- 11:17 AM PST     Moonset
Thu -- 11:21 AM PST     1.58 knots Max Flood
Thu -- 02:22 PM PST     -0.00 knots Slack
Thu -- 04:29 PM PST     Sunset
Thu -- 06:14 PM PST     -3.54 knots Max Ebb
Thu -- 07:14 PM PST     Moonrise
Thu -- 09:46 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Grays Harbor Entrance, Washington Current, knots

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Langley,Hill/Gray,Harbor,WA