Piercy, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

988
FXUS66 KEKA 100720
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1220 AM PDT Sun May 10 2026

.SYNOPSIS...Temperatures will slowly continue to warm and are
expected to peak on Monday. Gloomy stratus will continue to
blanket the coast again Sunday with a better chance for clearing
Monday. There is the possibility of some rain, drizzle, and inland
thunderstorms on Wednesday or Thursday.

&&

.KEY MESSAGES...

-High interior temperatures will peak Sunday and Monday with
moderate HeatRisk in Mendocino and Lake Counties.

-Gloomy coastal skies will continue with potential scattering out on
Monday.

-Cooler temperatures and slight thunderstorm and coastal drizzle
potential around Wednesday or Thursday.

.DISCUSSION...The axis of the upper level ridges remains to the
east of the area. The winds are keeping the marine layer clouds in
place along the coast. Inland areas remain warm with highs in the
80s to near 90. The marine layer is keeping the western half of
the coastal counties cooler. This slightly moderated air is
impacting Gasquet, Hoopa, Garberville, Laytonville, Willits and
down into Ukiah. These areas remained in the mid 70s to mid 80s
today. Areas farther inland such as Weaverville, Covelo, and much
of Lake county were in the upper 80s to around 90. Sunday is
expected to be very similar to Saturday with a weak trough
approaching from the west. The marine layer may slightly farther
inland keeping temperatures slightly cooler than today.

Sunday afternoon the trough moves through the area. This may
increase the mixing and could bring some brief clearing at the
coast. This shifts the wind to more offshore by Monday morning.
There are better chances of more clearing by Monday afternoon.
This offshore flow should also help bring warmer temperatures
the the near coastal areas 10 to 20 miles inland with many of
these areas reaching into the upper 80s to low 90s. Farther inland
mid 90s are expected. There is the potential that the low clouds
will linger at the immediate coast and keep temperatures around
60. This will likely be the warmest day of the next week for much
of the area. Heat risk is expected to moderate in portions of Lake
and Trinity counties.

Tuesday an upper level low starts to approach the area and this is
where model solutions start to diverge. Some of the ensemble
clusters bring this low quickly north and into Washington and
Oregon while the slowest solution keeps the low well off the
California coast. The evolution of this low into Wednesday and
Thursday will have big impacts on the forecast. This could bring
the chance for Thunderstorms if the low moves onshore in northern
CA. However some of the other solutions could keep hot
temperatures over the area. Late in the week the models are
showing zonal flow developing over the west coast. There are still
some big differences whether there will be some weak ridging and
dry weather or the remnants of the upper level low continuing to
move through the area. Overall confidence is below normal in the
extended period.

&&

.AVIATION...Widespread stratus is bringing IFR conditions with
local LIFR conditions this morning. These are expected to persist
into at least early afternoon. This afternoon northwest winds
start to increase and this may help to clear skies for a few
hours. At ACV the HREF is still showing a 25 percent chance of
MVFR CIGS lingering through the afternoon. CEC is seeing a better
chance of clearing and remaining clear into the evening. At KACV
there is a better chance of MVFR or IFR CIGS returning in the
evening. MKK

&&

.MARINE...Northerly winds are expected to increase through Sunday
afternoon as an upper level trough moves out of the area. This
appears to have slowed slightly, so have pushed back the start of
the small craft advisory in the northern waters. Later this
afternoon and evening winds are expected to be mainly around 20 to
25 KT with locally stronger areas in the lee of Cape Mendocino.
The swell continues to move through the waters at around 3 to 4
feet at 12 to 14 seconds. Wind driven short period waves are
expected to increase to around 5 to 9 feet Monday night.

Monday the northerly winds are expected to diminish as an upper
level low starts to approach the area. Lighter winds are expected
on Tuesday and Wednesday. However there is quite a bit of
uncertainty in the pattern for the middle of the week so
confidence is a low and many different model solutions are
possible. The middle of next week there is the potential for the
northwest swell to increase some as well. MKK

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 3 AM PDT Monday for PZZ455.

     Small Craft Advisory from 1 PM Sunday to 9 PM PDT Monday
     for PZZ470.

     Small Craft Advisory until 9 PM PDT Monday 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