565
FXUS66 KEKA 042108
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
208 PM PDT Sat Apr 4 2026

.SYNOPSIS...Above normal warmth will continue for the remainder
of the weekend, followed by a cooling trend next week. Chance for
rain showers will return around mid week.

&&

.DISCUSSION...Temperatures today were 5 to 15F degrees warmer
compared to yesterday as of 2 PM Sat. Upper ridge axis is forecast
to shift eastward into the Great Basin on Sunday. Light offshore
wind regime will once again propel high temps well above seasonal
averages (5-15F) again on Sunday. Temperatures are forecast to
peak into the upper 70s to mid 80`s again in the interior while
most coastal areas warm into the mid to upper 60s again. A few
coastal valleys (Blue Lake and Fortuna) will most likely reach the
lower to mid 70s again. Minor heat risk is expected again on
Sunday. A downward trend of high temps is forecast to commence on
Monday, though it is still forecast to remain above normal in the
interior. An upper low will approach early next week (Mon-Tue).
Stratus and perhaps fog will increase for coastal areas as early
Sunday night as a shallow marine layer builds and onshore flow
develops. Precipitation chances appear minimal Mon through Tue,
though spats of drizzle or a few passing sprinkles are possible as
transient shortwave trough in SW flow aloft rides over the ridge.

Precipitation chances return around mid week (Wed) as an upper
low approaches the coast and meanders about offshore through Fri.
Multiple outcomes are possible mid to late week. One is the upper
low could remain far enough offshore as the ridge holds over the
area. This would result in no precip and no chance for thunderstorms.
The cut-off could also weeble wobble around offshore parallel to
the Central California coast. In this case, wrap around moisture
would increase the potential for interior thunderstorms Wed-Fri.
Another possible outcome is for an upstream kicker to drive the
trough/low complex across our forecast area Wed-Thu resulting in
mostly light precip totals and no storms for NW Cal. Beyond Fri,
wrap around moisture with interior showers and convection appear
to be one possible outcome. Another outcome is for another colder
trough to come barreling down from the NW bringing considerable
cooling and perhaps more light precip. Overall not much rain
potential with this large scale chaotic set-up, but cooler high
temps appear very probable (>80% chance).

&&

.AVIATION...VFR conditions continue while winds remain light.

The environment remains dry with only high level clouds moving in
around around a weak passing shortwave. Winds are light from the
west to north Friday afternoon. Patchy ground fog was observed
near some of the coastal terminals Saturday morning, but chances
are lower through Sunday morning. The passing shortwave will
slightly increase southerly flow and low level moisture, to begin
increasing chances for marine stratus outside of this TAF period
by Sunday

&&

.MARINE... Northerlies and lingering short period seas continue to
decrease across the waters as a small northerly swell fades. Very
light, split flow winds will remain over the waters through Monday.
Northerly winds will increase behind a front late Tuesday. Near-gale
to gale strength gusts are possible as early as late Wednesday, with
better chances Thursday and Friday. Short period seas will likely
exceed 10 ft through that period. Some small mid to long period
southerly swells will also exist through the waters.

&&

.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