textproduct: Eureka

SYNOPSIS

Isolated showers and thunderstorms are possible in the interior each afternoon through Monday. Drier weather returns mid next week.

DISCUSSION

A deep marine layer will once again bring widespread coastal stratus this morning. A shortwave moving through the area may support some drizzle along the coastal areas this morning as well. Most interior shower activity this morning will generally remain east of the area, though a stray light rain shower in eastern Trinity County. Dew points have dropped as drier air arrives behind these showers and are in the low to mid 30s in Trinity County. Frost may be possible in the coldest valleys of Trinity County with lows possibly as low as the mid 30s. Confidence is low with cloud cover from nearby showers along with potential low cloud cover.

Showers and isolated thunderstorms are possible again in the afternoon and evening over Trinity, eastern Mendocino, and northern Lake. Instability has waned somewhat over recent model runs, but still a few lightning strikes are possible. High-res models show areas of moderate to locally heavy rain rates over the higher terrain in eastern Trinity, eastern Mendocino, and far northern Lake Counties. HREF is showing around 50% chance for over a half inch of rain in these areas. Showers will taper off in the evening and overnight. Additional showers are possible again for the interior areas Monday afternoon and evening. Instability currently looks meager, so thunderstorms are less likely. Drier and warmer weather is likely to return by mid next week as ridging redevelops. JB

AVIATION

A very deep although weak marine layer has blanketed the coast (and even much of the interior) in MVFR ceilings around 2 kft overnight. The marine layer is particularly robust for the southern half of the area, covering nearly all of Mendocino County in 3kft ceilings. Ceilings over the interior will quickly lift to VFR in the morning, but will cling longer to the coast, with a 60% chance of MVFR ceilings all day in Crescent City and around Humboldt Bay. Regardless of clearing, stratus will again resurge along the coast Sunday night. /JHW

MARINE

North winds in the outer water will continue to weaken Sunday, leaving gentle winds in all water sand short period seas falling below 6 feet by the afternoon. Meanwhile, a minor mid period westerly sell will continue to build in up to 4 feet by Sunday evening.

Gentle winds will generally continue Monday with the swell rapidly decaying. Northerly winds will begin to return to southern waters Monday night and spread into the northern waters by Tuesday. steep short period seas will build in response at least in the outer waters. Though strongest in the outer waters, short period wave energy will begin to impact the inner waters mid week. Winds will continue to increase late weak with a 75% chance of near gale conditions by Thursday in the outer waters. /JHW

EKA WATCHES/WARNINGS/ADVISORIES

CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 7 AM PDT this morning for PZZ470- 475.