328
FXUS66 KEKA 241842
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1142 AM PDT Sat May 24 2025

.SYNOPSIS...Slightly warmer weather is forecast for the interior
today. A weak cold front brings a chance of light rain to Humboldt
and Del Norte Counties Sunday night into Monday along with a cooling
trend. A warming trend is expected for the next week into the
weekend bringing possible triple digit temperatures.

&&

.DISCUSSION...
Key Messages:
-Warmer weather forecasted for the interior today with evening NW
gusts of 20-30 mph in Lake and Mendocino counties in the afternoon
and evening.

-A weak cold front brings a slight chance of wetting rain to
Humboldt and Del Norte Counties Sunday night into Monday
morning along with a cooling trend.

-A warming trend is expected for the next week into the weekend
bringing possible triple digit temperatures to inland valleys Friday
and Saturday.


Weather Pattern Overview: A weak ridge has started to fill in over
northwestern California. A persistent layer of coastal stratus is
keeping the Northern Humboldt and Del Norte coastline cool this
morning. Interior high temperatures today are forecast to be a few
degrees higher with 80`s and 90`s forecast in the valleys of
Trinity, Mendocino, and Lake counties. This warm up will be short
lived as another weak cold front makes its way to the area Sunday
into Monday. This will bring more widespread cloud cover especially
in the middle and higher levels moderating temperatures and a chance
of light rain. Ridging builds back in for much of the week, though
there is considerable variability on the strength of this ridge.


Forecast Confidence & Deviations: NBM is showing around a 10-20%
chance for measurable precipitation (>0.1") in Humboldt and Del
Norte counties for Monday morning. Ensembles are in decent agreement
for an upper-level low forming off the coast of southern California
mid to late next week. Depending on the position of the low,
offshore flow could promote the warmest temperatures of the year so
far. NBM probabilities for triple digit temperatures are around 70-
50% for the warmest valleys next Friday into the weekend.

&&

.AVIATION...Coastal stratus has settled in along the coast north of
Cape Mendocino, through Humboldt and Del Norte counties and into the
extreme southern Oregon Coast. Coastal terminals are expected to
have a difficult time clearing out through today with high level IFR
ceilings to low level MVFR ceilings this morning at KACV and KCEC.
There is a possibility of lifting ceilings into MVFR range by this
afternoon; however, ceilings are expected to drop back down to IFR
late this evening and into early tomorrow morning. KCEC has more of
a possibility of clouds scattering out this afternoon while KACV
will have a harder time scattering out. KUKI is forecast to have VFR
conditions, with just a slight uptick in northerly winds this
afternoon. /JLW


&&

.MARINE...Moderate to strong northerly breezes will diminish to
more gentle to fresh breezes throughout today with the strongest
winds still in the lee of Cape Mendocino. By Sunday, light to gentle
southerly winds are expected for the northern waters as a weather
system approaches the area. The waves are expected to be mainly wind
driven.

Monday high pressure is expected to build back into the waters.
Winds are expected to peak on Tuesday before diminishing again on
Wednesday as another system moves by the area. Stronger winds are
expected again later in the week. At this point, there could be
brief periods of gales. Generally, winds are expected to remain
below gale force. The waves are expected to be mainly wind driven
through the period with some small southerly swells. These look to
be from 2 to 3 feet. MKK


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 11 PM PDT this evening for
     PZZ455-475.

&&

$$

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