textproduct: Eureka

SYNOPSIS

Cool conditions will steadily warm through late next week. The inland valleys will see night and morning low clouds and fog along more limited warming.

DISCUSSION

High pressure continues to build into northern California, although it remains flat with a weather system moving into the Pacific Northwest. As a result, some high clouds will continue to move over portions of the area through the weekend. Many of the interior valleys could see low clouds each morning and into early this week. It is possible that some low clouds may form along the coast, as well. These low clouds and temperature inversions in the valleys are expected to keep temperatures cool, even though the low clouds may clear out by the late morning and afternoon. No rain is expected.

This coming week, high pressure is forecast to strengthen which will bring warm air aloft. This will strengthen the valley inversions keeping fog and low clouds in many of them. This may also keep high temperatures in the colder valleys from warming too much.

Dry weather will likely continue through this coming week. Ensembles are hinting at a small chance for some precipitation in the long range (beyond 7 days out). MKK

AVIATION...(06Z TAFs)

VFR with occasional cirrostratus is expected to continue tonight and Sunday. Winds to remain light and variable at forecast terminals through the period. Chance for fog and mist with partial or full sky obscuration increases for coastal terminals (KCEC and KACV) Sunday evening and overnight with shallow humid layer building nearshore. Confidence in this remains low due to slight offshore flow which may keep stratus from impacting coastal terminals. Otherwise, interior fog and LIFR ceilings in the valleys of Trinity, Humboldt and northern Mendocino counties will clear out by noon on Sunday.

MARINE

A long period westerly swell will build Sunday through Sunday evening, peaking around 12 ft at 16 seconds by Monday morning. The swell will not be very steep, however swell heights over 10 feet will pose a danger to mariners operating small vessels and an advisory for hazardous seas remains in effect. Light to moderate northerlies return on Monday and increase by Tue. Gusts over 25 kts will become increasingly likely (over 70% chance) Tue into Wed with lesser chances (30%) for gale gusts > 34 kt, mostly over the outer waters and around Cape Mendocino. Elevated steep northerly waves in combination with a decaying westerly swell will continue on Thu and seas should remain hazardous for small craft.

BEACH HAZARDS

On Sunday, another long period westerly swell originating from a low near the Aleutians fills in at around 7 ft at 20 seconds and peaks around 12 ft at 16 seconds. A Beach Hazard Statement has been issued for this moderate sneaker wave threat late Sunday morning through Monday afternoon. Stay much farther back from the ocean and avoid steep beaches and jetties. Remember, never turn your back on the ocean! JB

EKA WATCHES/WARNINGS/ADVISORIES

CA... Beach Hazards Statement from 10 AM PST this morning through Monday afternoon for CAZ101-103-104-109.

NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory from 3 PM this afternoon to 11 PM PST Monday for PZZ450-455.

Small Craft Advisory from 3 PM this afternoon to 3 AM PST Tuesday for PZZ470-475.