631
FXUS66 KEKA 252130
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
230 PM PDT Sat May 25 2024

.SYNOPSIS...Cooler than normal temperatures continue across the
interior today. Warming temperatures inland and coastal stratus
continues this weekend.


&&

.DISCUSSION...Residual cloudiness is expected to continue to
diminish this afternoon as a trough moves out and a ridge begins to
build in. Gusty NNW winds will ease this evening. The building ridge
with light winds and clear skies will cool temperatures inland to
the 40s, with mid-to-high 30s possible in the colder valleys of
Trinity County. Coastal stratus is expected to build back in tonight
as the ridge builds in. Widespread stratus making it`s way far
inland is not expected tonight, and will likely remain restrained to
the Humboldt and Mendocino coasts. The probability for low ceilings
is lower for the Del Norte coast, around 20%.

Temperatures inland will warm Sunday into early next week as the
ridge builds in, with mid 80s likely by Monday. Warm temperatures
aloft will increase the marine inversion, keeping stratus along the
coast. SREF and NAM are highlighting thunderstorm potential inland
on Monday. NBM is showing less than a 10% probability of thunder,
however. As of now, model soundings are showing a lack of mid-level
moisture that would promote thunderstorm development, but this is
something that would need to be watched in case conditions worsen.

A trough arriving Tuesday morning brings the potential for more
widespread cloud cover and coastal drizzle, once again. Temperatures
will cool inland to the 70s Tuesday and Wednesday before a ridge
builds back in. This ridge will warm temperatures again inland, with
around a 50% chance to hit 90 degrees in most the warmer interior
valleys Friday. JB


&&

.AVIATION...VFR has prevailed since late this morning at all
terminals, while some slowly eroding mid cloud lingers in interior
Del Norte and Humboldt. Low cloud is expected to redevelop late this
evening and overnight along the Redwood and Mendo coast, although
categories are not forecast to dip as low as last night...with most
guidance indicating categories remaining primarily IFR. Though the
modeled probability for fog over the terminals is low into Sunday
morning, the ample surface moisture deposited from the rather
aggressive drizzle may be enough for another round of fog and LIFR
ceilings. Otherwise VFR will prevail after the mid cloud erodes this
evening across the interior.


&&

.MARINE...Northerlies have again become more focused in the
southern zones where 20 to 25 kt winds have been forecast to
develop. Short period seas will locally build and propagate in from
the north. The winds and short period seas of 6 to 8 feet warranted
Small Craft Advisory coverage in the southern, as well as portions
of the northern zones. The Advisory in the Southern Outer waters
continues through Sunday for lingering winds and seas. A 3 to 5 ft
NW swell at 8 seconds will also enter the waters through the
weekend. A mid period NW swell at around 5 ft at 13 seconds from a
late season Pacific trough of low pressure will also arrive on
Tuesday. The northerly winds will remain stronger in the southern
zones, up to 25 kts into early next week, with lighter northerlies
elsewhere.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 9 AM PDT Sunday for PZZ455-470.

     Small Craft Advisory until 11 PM PDT Sunday for PZZ475.

&&

$$

Visit us at https://www.weather.gov/eureka

Follow us on Facebook and Twitter at:
https://www.facebook.com/NWSEureka
https://www.twitter.com/NWSEureka

For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png