textproduct: Eureka

KEY MESSAGES

* A general troughing pattern will bring additional light rain over the region today and periods of unsettled weather over the weekend.

* Overnight temperatures for the interior will turn chilly, bringing chances for frost Friday morning and through the weekend.

SYNOPSIS

Winds have sharply subsided into early this morning, while rainfall turns lighter as the storm system continues east. Light rainfall chances continue today as a weaker area of low pressure moves by. Overnight temperatures for the interior will turn chilly, bringing chances for frost Friday morning and through the weekend. A general troughing pattern will bring additional light rain over the region today and periods of unsettled weather over the weekend.

DISCUSSION

Winds continue to sharply decline into early this morning. Rainfall has become light and showery for most of Northwest California, as well. A second colder and somewhat unstable area of low pressure will then move by today. This will continue the chances for showers and perhaps a couple of coastal thunderstorms.

As the environment attempts to clear out through Friday morning, much cooler overnight lows will develop for the interior. If clouds do clear out and fog does not develop, areas of frost will be likely for the interior. There is still some question on the amount of clearing or even additional light showers, especially with the numerous troughs forecast through the weekend. These will also bring a shot for some isolated thunderstorms.

The broad upper low to the north will stall ahead of blocked flow through the weekend, with weaker shortwave disturbances rotating in. More at least weak troughing may redevelop behind it. This gives mixed signals for the extended outlook. There will looks to be some sort warmup early to mid next week, but if it occurs, it should be short lived if the troughs continue moving through.

AVIATION...(06Z TAFs)

Winds and rain continue to diminish early this morning. Patchy areas of fog may form through the early morning hours, as well. MVFR to IFR ceilings could persist for coastal terminals into mid morning, with periods of LIFR. Ceilings at UKI will likely lower near or below 1500 AGL through the morning with the light rainfall.

MARINE

Strong southerly winds have diminished over the coastal waters. Wind driven seas up to 9 ft will subside below 5 ft early this morning. A trough from the north will then drive in a steep NW swell at 7 to 9 ft at 11 seconds today and tomorrow. If the swell comes in larger near 10 ft then advisory level conditions will be met. Mariners in small crafts should exercise caution on this day for this potential threat. Otherwise winds will be light for most of the waters through Saturday. Then, northerlies will strengthen some through the weekend, mainly over the southern water south of Cape Mendocino. The northerlies do not look to fully strengthen again until early next week. Hurricane Marie will deliver a long period southerly swell Saturday. Though small, at around 4 ft at 16 seconds, this is a larger than typical swell from this direction.

BEACH HAZARDS

Hurricane Marie will usher in a long period southerly swell of 3-4 feet at 16 seconds for south facing beaches by Saturday. Thus, there could be a risk of sneaker waves, especially if the swell comes in slightly larger.

Sneaker waves are a unique hazard, with up to 30 minutes between waves. Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. Even ankle to knee deep water can knock you down and drag you out when a sneaker wave hits. Pay attention and stay above the high water line and any wet sand to stay safe. If the ground is wet, waves have surged there recently. Stay safe and never turn your back on the ocean!

EKA WATCHES/WARNINGS/ADVISORIES

CA... None. NORTHWEST CALIFORNIA COASTAL WATERS... None.