Hayfork, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

796
FXUS66 KEKA 042245
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
345 PM PDT Mon May 4 2026

.SYNOPSIS...Cloudy skies and light showers continue through the
evening. Ridging fills in behind the low with warmer temperatures
and clearing out skies by mid week.

&&

.DISCUSSION...As low pressure proceeds south and inland, diffluent
flow is being observed on a synoptic scale with a high amplitude
ridge filling into the PACNW behind the large scale troughing
pattern. The anticyclonic motion, in sync with the low over our
area is pulling moisture through the mid levels. This has resulted
in layered cloud cover for much of the CWA with some light
showers but most of the precip accumulating in the southern
regions, Lake and Mendocino. Chances for thunderstorms on the
Trinity horn are around 20% through the evening. There could be a
few pop up thunderstorms with lightning tonight. Precipitation is
expected to ease with the passing of the exiting low before noon
Tuesday.


Drier conditions will quickly return by Tuesday. That said, there is
a very slight (< 10%) chance of some weak lingering thunderstorms
over the interior on Tuesday. Benign and weak high pressure will
build late in the week, bringing slightly warmer than average
temperatures but otherwise dry, seasonable, and calm weather.
There is chance for the marine layer to finally clear out around
Wednesday before rebounding later in the week as a marine
inversion reforms under the interior heat.


&&

.AVIATION...Fairly widespread MVFR clouds remain across the area.
Some showers continue in southern Mendocino and Lake counties.
Showers and a few thunderstorms are developing in northeast
Trinity county. These should end as the daytime heating
diminishes this evening. At the coast and in the valleys CIGs are
expected to slowly diminish tonight to IFR. A few pockets of
lowers conditions are expected, but these aren`t expected to be
widespread. Tuesday CIGs are expected to slightly lift, but remain
MVFR or possibly even IFR at the coast. MKK

&&

.MARINE...Winds are starting to become westerly south of Cape
Mendocino, but currently remain south or southwest farther north.
These are expected to become more northwest and eventually north
tonight and early Tuesday. For these time periods the waves are
expected to remain below 10 kt. The waves are dominated by a
northwest swell around 7 feet at 14 seconds. There is also a wave
around 5 feet at 9 seconds.

Tuesday afternoon northwest winds are expected to increase to
around 10 to 15kt. The waves remain dominated by a 3 to 4 foot
wave at 12 seconds and a 2 to 5 foot wave around 5 to 8 seconds.
This may mix with the local wind driven waves. The winds are
generally expected to remain around 5 to 15 kt out of the north
through the workweek. Late in the week a system moving by to the
north may briefly switch the winds to the west or southwest. Over
the weekend high pressure returns and near gale to gale force
northerly winds are expected to return. The waves are expected to
remain fairly small, around 3 to 5 feet at 10 seconds, through
Tuesday. A new swell is expected to build to 4 to 6 feet at 14
seconds on Wednesday. MKK


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
None.
&&

$$

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