Founders Grove Nature Trail California Weather Forecast Discussion

575
FXUS66 KEKA 150710
AFDEKA
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1210 AM PDT Wed Oct 15 2025
.SYNOPSIS...Cool and moist conditions will persist across the area
through Wednesday with slight warming and drying into the weekend.
Another rain event is most likely around Sunday.
&&
.DISCUSSION...Tonight, elevated dewpoints will likely aid in
valley fog formation. Despite generally clear skies, dewpoints
solidly above 40 will most likely inhibit frost formation all but
the coldest valleys. The most likely locations for some patchy
frost tonight will be around Ruth Lake and in Hayfork. The
potential for frost will slightly increase Wednesday night as
slight drying is expected. Even slightly more drying than
forecast, however, could greatly increase the potential for frost
and will need to be watched closely as the day goes on.
Conditions will only gradually warm late in the week as a weak
lobe of high pressure build across the area, though persistent
northerly wind and short days will limit the magnitude of warming.
By Friday, the warmest interior valleys will likely reach into
the low 80s with most areas closer to the mid 70s. Moderate marine
influence will likely keep coastal conditions not much warmer
than the upper 60s even though light offshore flow will promote
generally clear skies during the day. Otherwise, winds will be
weak.
Another round of rain is most likely to impact the area around
Sunday into early next week. Deterministic models mostly resolve a
shallow trough which would mostly restrict rain just to the
immediate North Coast. 90% of ensemble members show at least light
wetting rain. The spread of ensembles resolves 2 distinct scenarios.
About 50% show a light rain even with total precipitation of only
0.5 to 1.5 inches along the coast, while 40% show a stronger though
still moderate event with rainfall of 2 to 3 inches. The stronger
scenario would show some slight potential for southerly wind gusts
up to around 40 mph in exposed areas. /JHW
&&
.AVIATION...(06z TAFs)...The upper level low continues to move
southeast over Central California. Offshore flow through early
Wednesday is expected to persist. Along with this, southerly flow
near the coast will continue to push stratus north. Stratus
continues to settle in along the Mendocino and Humboldt coasts while
it may reach KCEC around sunrise Wednesday; however confidence is
low on this. Coastal terminals may remain cloudy all Wednesday.
&&
.MARINE...The stronger northerly winds continue to push further away
from shore early Wednesday morning. This will allow southerly winds
to advance north along the coast which will continue through the
day. Some of these winds may be briefly around 15 kt.  The long
period swell continues around 3 feet at 15 seconds. The northwest 10
second northwest swell continues to be around 4 feet at 15 seconds.
Wednesday night into Thursday northerly winds return and these are
expected to be stronger. These winds are expected to peak on Friday
and diminish through the day into Saturday. There may be some local
gale force gusts, especially south of Cape Mendocino. A larger
northwest wave is expected to build in on Friday evening. This is
expected to peak on Friday around 9 feet at 15 seconds. Saturday
night into Sunday morning there may be some brief southerly winds as
a cold front swings through. The strength and timing remain
uncertain, but most models keep the winds below 20 kt. Northerly
winds are expected to quickly return Sunday afternoon or overnight.
MKK
&&
.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 5 AM PDT Wednesday for PZZ470-
     475.
&&
$$
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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https://www.weather.gov/images/eka/zonemap.png

NWS EKA Office Area Forecast Discussion