Marine Weather and Tide Forecast for Port Townsend, WA

UPDATE
Other than minor tweaks to the aviation discussion below, no major updates for the forecast this evening.

HPR

SHORT TERM /TONIGHT THROUGH WEDNESDAY NIGHT/
The upper level trough over the eastern Pacific will continue to influence the region through the first half of the week allowing a series of weak systems to brush the area. The first will approach the region on Tuesday, boosting clouds and bringing a chance of light precip/showers mainly to the coast during the day then inland Tuesday night into Wednesday. There is a chance of up to a quarter of an inch of rain is possible particularly over the Olympic Peninsula and across the North Cascades. High temperatures Wednesday will be run a few degrees cooler, with most spots likely only climbing into the 60s, though a few may make it into the low 70s.

LONG TERM /THURSDAY THROUGH MONDAY/
Thursday continues to look like a transitional day - mostly dry with a few lingering post- frontal showers. The upper level low expected to being to shift onshore Friday into Saturday will bring more widespread rain and cooler temperatures. Rainfall amounts across the lowlands at this time continue to look around a tenth of an inch to a quarter of an inch. Of note snow levels are expected to dip down to 5000-6000 ft over the weekend, bringing the potential for light snow accumulations to the tallest mountain peaks.
High temperatures over the weekend will generally trend below normal as a result, with highs only expected to be in the 60s. Those with plans for outdoor recreation in the mountains will want to monitor the forecast for the latest information.

AVIATION
Southwest flow aloft continues into Tuesday as troughing approaches Western Washington offshore. VFR conditions this evening with high clouds at times. Onshore flow will increase at the surface tonight into Tuesday morning. Stratus will spread inland during this period, resulting in MVFR/IFR cigs for majority of the coast, with localized LIFR cigs. The eastward extent of stratus is expected to be generally from KPWT to KTIW, but will have to monitor any stratus potential for other TAF sites as well from SEA to PAE Tuesday AM (mainly 12 to 17z). VFR conditions otherwise for interior areas on Tuesday, with continued stratus along the coast into Tuesday afternoon. West winds will become lighter tonight before increasing from the S/SW on Tuesday.

KSEA...VFR conditions this evening with high clouds at times.
Stratus will push inland tonight into Tuesday morning. At this time, low stratus is expected to remain SW of the terminal. But will have to monitor any further eastward progress towards the terminal, mainly between 13 to 17z. VFR conditions otherwise on Tuesday. NW surface winds for a brief period through 05-06z this evening before transitioning back to S/SW tonight. JD

MARINE
High pressure at the surface will weaken tonight into Tuesday. A weak front is expected to bring showers across the waters Tuesday evening into Wednesday. Expect high pressure to rebuild Wednesday night into Thursday, before a more organized system pushes through the region Friday into next weekend.

The small craft advisory for the Strait of Juan de Fuca continues for this evening/tonight for west winds of 15 to 25 kt. Another push will be possible again Wednesday through Friday.

Seas increasing to 3-6 feet tonight through Saturday, with possible increases to 6-8 feet next weekend with the weather.

HPR

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory until 2 AM PDT Tuesday for Central U.S.
Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.