162
FXUS66 KEKA 310755
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1255 AM PDT Sun May 31 2026

.SYNOPSIS...Temperatures warm through Monday with building high
pressure and limited cloudcover. Breezy northerly winds expected
Sunday before winds ease into next week. Marine clouds return
Tuesday.

.KEY MESSAGES...

-Breezy winds at the coast this weekend.

-Warmer and drier conditions build Sunday through early this week.

-Gradual cooling and return of the marine layer late in the week.


&&

.DISCUSSION...High pressure is building in the region to bring
continued breezy northerly winds Sunday and warmer temperatures into
next week. The coastal temperatures will be suppressed by the cool,
marine influenced air, but easing winds Monday will allow for a nice
warmup. The interior valleys are expected to reach the low 90s
Monday and possibly Tuesday.

Monday night into Tuesday morning the models are starting to
indicate a return of the coastal low clouds. This is due to a
shortwave approaching the Pacific Northwest. It is possible these
clouds will hold off until Tuesday evening, but for now the winds
look to be much lighter Monday night allowing stratus to form.
Tuesday the marine clouds will likely clear out in the afternoon,
but the marine air is still expected to make it into the western
half or two thirds of Mendocino, Humboldt and Del Norte counties
cooling temperature by several degrees. Farther inland temperatures
may continue warming be a few degrees. The shortwave and weak front
may generate some light coastal drizzle late Tuesday and Wednesday,
but little to no accumulating precipitation is expected.

Late in the week the ensembles are in general agreement that an
upper level trough will approach the area. The clusters show some
discrepancies on the strength and timing. The fastest and deepest
cluster brings some light rain to the area on Saturday while the
rest of them keep it farther to the north. The NBM shows a 10 to 30
percent chance of a tenth of an inch in northern Humboldt and Del
Norte counties on the next weekend. MKK/JJW


&&

.AVIATION...Northerly winds have mixed out much of the lower level
moisture leaving mostly VFR conditions early Sunday morning. Some
moisture pooling is allowing for some lingering stratus around
Humboldt Bay and the Eel River delta, which may periodically near
ACV. There is a low (30%) chance for IFR ceilings at this terminal
from 12 to 15Z Sunday. Northerly winds increase Sunday afternoon,
gusting 25 to 35 kts at the coastal terminals before easing into
the evening.


&&

.MARINE...Northerly winds will continue stronger Sunday through
Sunday night, with gale conditions in the outer waters, and also
around Cape Mendocino and Point St George. Steep and hazardous seas
are developing in response, and are expected to propagate into the
inner waters periodically. A Hazardous Seas Warning has been hoisted
for the northern inner waters in anticipation of this occurrence,
while Gale Warnings remain for the outer zones. Conditions will
improve Monday with easing winds and seas. Winds and seas will
then remain low over the northern waters through mid next week,
while stronger northerlies remain in the southern waters, mainly
confined around Cape Mendocino. A small, long period southerly
swell will slowly build in through early next week.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 3 PM PDT this afternoon for
     PZZ450.

     Hazardous Seas Warning from 3 PM this afternoon to 3 AM PDT
     Monday for PZZ450.

     Small Craft Advisory until 3 AM PDT Monday for PZZ455.

     Gale Warning until 3 AM PDT Monday for PZZ470.

     Gale Warning until 9 PM PDT this evening 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