Marine Weather and Tide Forecast for Longbranch, WA

SYNOPSIS
High pressure building over the region today will provide for morning clouds and fog and mostly dry conditions.
Little change in the pattern through midweek, with a weak system bringing renewed precipitation chances for Thursday. Drier but cooler conditions likely return for the weekend.

SHORT TERM /TODAY THROUGH WEDNESDAY/
Mix of conditions across the region this morning with some pockets of fog and low stratus around much of the interior. Meanwhile temperatures mostly in the 30s, with many of the overnight lows already occurring as developing low clouds have cut off the efficient radiative cooling of clear skies. Nevertheless, expect a variety of conditions with some areas of frost in the outlying cooler locations and variable visibilities under fog and low stratus elsewhere in the interior. With the ridge pushing overhead, guidance continues to suggest a rather slow break out from the clouds this morning (or even this afternoon, in many locations), which would leave temperatures this afternoon a little it on the cool side. Expect a similar pattern the next few days with decent radiational cooling, lowering inversion height under the ridge axis, and light surface gradients to support rounds of morning fog each of the next few mornings. With moisture less prominent each day, expect to see somewhat earlier breakouts each day and temperatures during the day trending up a few degrees toward midweek.

LONG TERM /THURSDAY THROUGH SUNDAY/
Expect some increased cloud cover late Wednesday into Thursday as ensemble guidance continues to support a brief shake-up in the pattern as the next upper trough slides into south-central British Columbia. Some light precipitation (lowland rain and mountain snow) still is favored as this weak disturbance pushes through the top of the ridge and spreads across the area, but the bigger sensible weather impact for many will be the additional clouds and a bit more mixing which should bring a brief reprieve from the fog and any increasingly stagnant air. For the remainder of the week, the spread in potential scenarios becomes increasingly large owing primarily to differences in the position and amplitude of the Pacific ridge - specifically , is it close enough to block the region from additional disturbances or far enough offshore to leave the door open. The forecast continues to reflect generally dry conditions late in the week and through the weekend, but also cooler overnight lows for Saturday and Sunday nights that could bring lows into the 20s for most of the interior. Cullen

AVIATION
Upper level ridge over the area with northwesterly flow aloft. High pressure at the surface with light flow in the lower levels.

Widespread IFR ceilings over the interior this morning with local LIFR ceilings and visibility. VFR conditions along the coast. Slow improvement over the interior this afternoon to high end IFR/MVFR ceilings with visibility restrictions dissipating around 21z.

KSEA...IFR ceiling with slow improvement after 19z. Could see a couple hours of VFR late afternoon/early evening before conditions deteriorate back down to LIFR ceilings after 04z tonight. Light winds becoming north 4 to 6 knots this afternoon. 33/Felton

MARINE
High pressure will remain over the waters through the majority of the week. A weak front will move across the waters Thursday into Friday.

Possible small craft advisory winds in the Strait of Juan de Fuca Thursday.

Seas 10 to 12 feet over the waters this morning subsiding to around 9 feet over the inner coastal waters late morning. Seas remaining 10 or 11 feet over the outer waters until at least Tuesday night. Felton

HYDROLOGY
River flooding is not expected through the next seven days.

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory until 10 AM PST this morning for Coastal Waters From Cape Flattery To James Island Out 10 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm- Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm-Grays Harbor Bar.

Small Craft Advisory until 6 PM PST Tuesday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm.