FXUS66 KEKA 220709
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1209 AM PDT Sat Aug 22 2026

.KEY MESSAGES...

* Generally mild, seasonable weather is expected for the next
  week.

&&

.SYNOPSIS...Slightly below normal temperatures are expected today. 
Some warming in the interior is expected Sunday and Monday before 
another trough brings cooler temperatures next week. Dry, seasonable 
weather is likely for the next week.


&&

.DISCUSSION...The upper low that brought a deep marine layer and 
upper-level moisture (and the associated high clouds) moves out of 
the area today and high pressure starts to build in behind it. 
Marine influence is expected to keep temperatures in the interior 
moderated with most areas in the 80s to low 90s. 60s and 70s are 
likely closer to the coast. Stratus along the immediate coast is 
likely to at least partially clear this afternoon with model 
soundings showing a very weak marine inversion. 

Weak offshore flow tonight into Sunday morning may slow the 
reemergence of coastal stratus, though most models do show at least 
some clouds reforming. Regardless, breezy coastal winds Sunday 
afternoon are likely to scatter any remaining stratus bringing a 
mostly clear, but breezy, Sunday afternoon at the coast. Interior 
temperatures jump closer to normal with 90s likely for most interior 
valleys. 

Monday through the middle of the week, a trough starts to approach 
the area bringing slightly cooler interior temperatures along with a 
deeper marine layer. Light winds offshore may lead to coastal 
stratus to be persistent into the afternoons. Moisture and 
instability is limited with this troughing pattern, which will limit 
thunderstorm potential. Generally mild, seasonable weather is likely 
for much of the next week.


&&

.AVIATION...(6Z TAFs)...MVFR ceilings are being observed at the 
coastal terminals as the marine layer remains deep. Ceilings may 
fall briefly to IFR before sunrise. Ceilings are likely to lift in 
the morning and into the afternoon. Scattering is possible, but NBM 
does have ACV and CEC have a 45% and 60% chance for at least MVFR 
ceilings, respectively. A weak marine inversion does lend some 
support to at least partial scattering for a few hours in the 
afternoon.


&&

.MARINE...Northerly winds return today, especially south of Cape 
Mendocino. Locally stronger northerly winds, with near gale to gale 
force gusts, are likely in the immediate lee of the Cape by this 
evening. Winds continue to increase and spread across the waters 
into Sunday with stronger winds with gusts of 20 to 30 kts likely by 
Sunday morning. South of Cape Mendocino, winds peak Sunday 
afternoon, while north of the Cape, winds peak Sunday evening and 
overnight. Winds quickly diminish early Monday and winds remain 
relatively light through midweek. Aside from steep wind waves from 
these northerlies, seas this week will be dominated by small long 
period southerly swells and mid period westerly swells.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from midnight tonight to 3 AM PDT 
     Monday for PZZ455.

     Small Craft Advisory from 6 PM Sunday to 9 AM PDT Monday 
     for PZZ470.

     Small Craft Advisory from midnight tonight to 9 AM PDT 
     Monday 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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https://www.weather.gov/images/eka/zonemap.png