040
FXUS66 KEKA 120057
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
557 PM PDT Wed Jun 11 2025

.AVIATION...(00Z TAFs UPDATE) A persistent marine layer will
return tonight. IFR ceilings expected to redevelop late this
evening and overnight with mist possible closer to sunrise. Otherwise,
northerly winds will continue to increase Thursday. Winds
will mix away the MVFR/IFR ceilings into VFR conditions along the
Redwood coast. Ceilings expected to scatter away late morning to
nearly clear skies for the coastal terminals. Inland, VFR
conditions are expected through the TAfs period as HREF valley
stratus probabilities at KUKI have dropped significantly.



&&

.PREV DISCUSSION... /issued 102 PM PDT Wed Jun 11 2025/

SYNOPSIS...Interior temperatures forecast to diminish each day
through Friday. Coastal stratus coverage becoming less through the
week with clear skies possible Friday afternoon. Stronger winds are
to be expected through the rest of the week into the weekend.

Key Messages:

* Interior heat risk forecast to remain low rest of this week.

* Gusty westerly and northwesterly breezes in the interior valleys
  each afternoon and evening through Friday.

* Locally strong coastal northerlies around the headlands and
  over the King Range through this weekend.

DISCUSSION...

An upper upper level trough swings over our area from the north
through the rest of the week. This synoptic weather will bring a
general cooldown to our temperatures through the weekend. Inland
valleys will struggle to break 90F on Wednesday through the rest of
the week and weekend. High tempertures look to be around the low 80s
at the warmest for inland valleys Friday and Saturday as of right
now. This comes a relief after what has been a warm couple of weeks
to start meteorological summer. These cooler temperatures will also
be accompanied by stronger winds with afternoon wind gusts around
15 to 20 mph in the later portion of the week.

This weekend, an upper level trough will impact the PacNW with
possible light rain. While most of the rain potential lies be out
of our area and focused mostly in Oregon and Washington, there is
a low, 5-10% chance, that Del Norte and Northern Humboldt could
receive some precipitation accumulation, 0.01-0.02" of rain through
Monday. It will be fairly "hot" in the interior valleys through
this weekend; mostly in the 80`s. Low heat risk is forecast and
those extremely sensitive to heat may be still be impacted. Coastal
areas will remain cool with possibly more clearing and sunshine.
Early to mid next week, interior temperatures may start to warm a
little, but so far no clear signal in a major warm up or cool
down into mid next week.

AVIATION...

18Z TAF: Deep marine layer still present over the northern
Humboldt and Del Norte coasts this afternoon. MVFR conditions
prevail at CEC and ACV with light NW flow. A few gusts over 10
knots possible this afternoon with potential for brief scattering
- chances are better at CEC where northerly winds offshore may
scour out a portion of the stratus shield. Similar IFR ceilings
expected to redevelop late this evening and overnight with mist
possible closer to sunrise. HREF indicates <50% chance for stratus
development spilling over into the Russian River Valley at UKI.
Otherwise, northerly winds will continue to increase Thursday,
allowing a better chance for scattered to nearly clear skies for
the coastal terminals.

MARINE...

Winds will continue to gradually increase across the outer waters
through the work week. Locally near gale to gale force wind gusts
are forecast to develop leeward of Cape Mendocino Wednesday afternoon.
Widespread fresh to strong northerly breezes with some near gale
force gusts downwind of Cape Mendocino and Point Saint George begins
on Thursday as high pressure stalls over the eastern Pacific and
the pressure gradient tightens up along the coast. Winds and seas
will be elevated through the weekend, especially in the outer
waters.

Mid period northwest swell will continue to dominate the sea state
through mid week. In addition, a long period southwest swell of 3-4
feet at 17 seconds will slowly subside through Thursday. This could
present a small sneaker wave threat on south facing beaches if it
ends up coming in this big.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 9 AM PDT Friday for PZZ455-470-
     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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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png