Marine Weather and Tide Forecast for Greenwater, WA

SHORT TERM /TONIGHT THROUGH THURSDAY/
Models have remained virtually unchanged in regards to the short term forecast. An upper-ridge is centering over the PNW as its axis cuts precisely over the Olympic Peninsula. We'll remain dry and cool tonight with high pressure at the surface. Mid to high level cloud coverage will stream overhead, keeping those overnight lows relatively (much emphasis on "relatively") warmer than seen previously.
Nevertheless, values are forecast to fall into the mid to upper 20s. Coastal spots will be the warmest with values in the lower to mid 30s.

Transient shortwave trough briefly overhead during the first half of the day on Tuesday. This feature will be followed by the redevelopment of more upper-ridging by Tuesday night into Wednesday. It'll last through most of the remaining short term period. However, conditions are beginning to converge on another incoming shortwave trough but this time is accompanied by moisture. Deterministic guidance still has some disagreement in exact timing but the NBM has widespread PoPs painted across W WA by Thursday night. Below normal temperatures remain favorable with highs in the lower to mid 40s and lows in the mid 20s to lower 30s.

LONG TERM /FRIDAY THROUGH MONDAY/
Guidance agrees on the development of an amplified ridge over the weekend and into early next week. A rex block pattern looks to set up shop around this time so a period of sustained ridging could be at play. To reflect this, the Climate Prediction Center has temperatures and precipitation trending below normal throughout the next 6 to 10 days.

McMillian

AVIATION
The upper ridge over Western Washington will flatten tonight as a weak trough aloft moves through the area. Westerly flow tonight will then become more northwesterly on Tuesday afternoon as the ridge builds back offshore. VFR cigs with high clouds through this evening. Localized LIFR cigs and vsbys will be possible again later tonight into Tuesday morning, mostly from Olympia southward and along spots of south Puget Sound. Otherwise, VFR cigs with high clouds at times and increasing mid to high clouds along the Olympic Peninsula on Tuesday. Light winds will continue through Tuesday.

KSEA...VFR conditions with high clouds into tonight. Low clouds and LIFR vsbys are expected to remain south of the terminal on Tuesday morning, with only a 10% chance of LIFR. Otherwise, VFR on Tuesday with high clouds at times. Light north winds of 3 to 7 kts are expected through this evening, with winds becoming light S/SE tonight into Tuesday. JD

MARINE
High pressure will remain over the waters into this evening. A weak system will move by to the north into Tuesday, but no impact is expected for the waters. High pressure will then build back into the waters Tuesday night and remain through Thursday morning. A weakening front will move southwards through the area Thursday night into Friday for increasing northerly winds, especially for the Coastal Waters. Small Craft Advisory winds will be possible during this period for at least the Coastal Waters.
Increasing Fraser Outflow is expected later early Saturday, with more north to northeasterly winds over the weekend.

Seas will be 4 to 7 feet through Tuesday before subsiding to 3 to 5 feet on Wednesday. Seas will then build with the next front Thursday night into Friday to 9 to 13 feet. JD

HYDROLOGY
No river flooding in the next 7 days.

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