299
FXUS66 KEKA 251914
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1214 PM PDT Fri Sep 25 2026

.KEY MESSAGES...

* Cooler temperatures will arrive this weekend behind the front,
  bringing chances for isolated interior frost.

* The extended forecast is dry

* A long period swell will bring a moderate risk for sneaker waves
  early next week.

&&

.SYNOPSIS...After some overnight rainfall for mainly the northern
coastal areas, conditions will begin to dry back out. A colder
airmass behind the front will bring chances for isolated frost over
the coming mornings. The extended forecast does not currently have
chances for additional rainfall.


&&

.DISCUSSION...A solid wetting rainfall was recorded Thursday night,
but the areas that received it only extended from Humboldt Bay
and northward. Del Norte received over an inch. The rain gradient
was tight, so areas south of Humboldt Bay only recorded trace
amounts. Winds gusting 20 to 30 mph can be expected through the
afternoon hours today.

A colder air mass will arrive overnight tonight. This will bring the
potential for isolated frost for some of the coldest interior
valleys (particularly Hayfork). For tonight, the combination of
offshore winds and increasing mid to high level clouds from a
nearing frontal boundary should limit the frost potential. Wind
sheltered interior areas that recorded rainfall may also likely
see radiational fog overnight, but the increasing higher clouds
should limit coverage. A trough will pass through Sunday to
reinforce some chillier air and continue an isolated interior
frost threat. Chances for chilly temperatures and frost will
continue into at least early next week. A trough will pass through
Sunday. The passing trough Sunday and a frontal boundary
preceding it Saturday will be dry, but could bring a weak
afternoon shower or two. The extended outlook looks to remain dry
with no chance for measurable rainfall.


&&

.AVIATION...After some overnight rainfall, the remnant low clouds
and mist/radiational fog have mixed out Friday afternoon. Breezy
northerly winds developed, with gusts up to around 25 kts expected
at the terminals through the afternoon hours. The well mixed
environment with light offshore winds overnight will likely
somewhat inhibit the expected overnight radiational fog
development. Winds sheltered areas may see some fog, including
ACV. Mid to high levels clouds arriving may also limit the fog
coverage.


&&

.MARINE...Steep seas from a post frontal westerly swell will ease
today, but northerly winds are quickly strengthening. The northerly
winds will reach gale strength by early Saturday morning in the
southern waters. Steep short periods will build with the wind,
entering the inner waters at times. The northerlies will weaken some
Sunday will a passing trough, but will restrengthen early next week.
A small long period WNW swell is forecast to arrive Monday, at
around 3 to 6 ft at 16 to 17 seconds.


&&

.FIRE WEATHER...Very good recoveries were recorded Friday
morning, even in areas without rain. Northerly to westerly winds
will remain gusty today, although RH trends higher. A pronounced
offshore wind surge will then develop tonight, drying out the
interior somewhat Saturday with min RH dropping to the low 20s to
upper teens. The extended forecast does not include any more
chances for wetting rain.


&&

.BEACH HAZARDS...A long period west northwest swell at 3 to 6 ft with
a period up to 17 seconds will build in Monday. This swell will
bring a moderate risk for sneaker waves. A smaller 3 ft long
period south swell will also bring some risk for sneaker waves for
south facing beaches starting Sunday. High astronomical tides
will increase the danger, especially over rocks and jetties.

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...
     Small Craft Advisory until 11 PM PDT Saturday for PZZ450.

     Small Craft Advisory until 9 AM PDT Saturday for PZZ455.

     Small Craft Advisory until 7 AM PDT Sunday for PZZ470.

     Small Craft Advisory until 2 AM PDT Saturday for PZZ475.

     Gale Warning from 2 AM to 11 AM PDT Saturday for PZZ475.

&&

$$

NOTE: The full forecast discussion is now regularly issued between
10 am/pm and 1 pm/am. Additional updates will be issued as needed.

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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png