644
FXUS66 KEKA 251156
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
456 AM PDT Sat May 25 2024

.SYNOPSIS...Unseasonably cool temperatures continue today across
the interior. Coastal clouds are expected to clear back to the
coast this afternoon. Warming temperatures are expected across the
interior Sunday and Monday while the coast continues to see cool
temperatures and periods of fog and low clouds. Some cooling is
expected Tuesday through Thursday before another warming trend
starts Friday.

&&

.DISCUSSION...An upper level trough over the west coast is
bringing below normal temperatures and widespread coastal clouds
to the area this morning. The cold front has moved past Crescent
City and this has allowed clouds to lift. It has also increased
northerly winds to around 10 KT. Widespread stratus is in place
across much of the area aside from Lake county. This stratus is
expected to take time clearing out today, but mostly clear skies
are expected by early afternoon. Highs are only expected to be in
the 70s across the interior and around 60 at the coast.

For next week generally dry conditions are expected with just some
fluctuations in high temperatures and possibly stratus.  Tonight
and Sunday high pressure starts to build in. Offshore flow looks
too weak to keep skies clear. Temperatures aloft are warming and
this will strengthen the inversion reducing the potential for
mixing. Inland this will allow temperatures to warm to around 80.
Coastal clouds will likely clear back to the coast. Monday high
pressure continues to strengthen and highs warm into the mid 80s.
Tuesday morning another trough approaches the Pacific Northwest
bringing highs in the 70s again. This will likely increase the
marine clouds and may bring some drizzle to the coast. Cooler
temperatures are expected on Wednesday with highs in the low to
mid 70s. Thursday through Saturday confidence is growing that high
pressure will strengthen bringing above normal temperatures.
Friday there is the potential to exceed 90 degrees in some of the
warmer valleys. For example there is a 45 percent chance in Ukiah
and a 20 percent Lakeport of exceeding 90 degrees. MKK

&&

.AVIATION...12Z TAF
ACV/CEC...Subsidence behind a passing trough is aiding in
improvement from the periods of fog and persistent drizzle observed
overnight, and ceilings will continue to rise. The marine layer is
quite deep, and protruding well inland, but conditions are quickly
improving behind the trough. Ceilings will lower back to IFR levels
this evening, with continuation to LIFR probable (30%). Though the
probability for fog over the terminals is low (10 to 15%) into
Sunday morning, the ample surface moisture deposited from the rather
aggressive drizzle will be enough for more poorly modeled fog and
LIFR ceilings.

UKI....Looking at the nighttime satellite, the deepened marine layer
is pushing close to the valley on the western slopes. Stratus has
reached the northern inland area Ells Field airport in Willits, but
has not breached the UKI valley yet. There continue to be low
chances (15%) for a MVFR ceiling to make it over the terrain early
this morning. Otherwise, VFR will prevail at this terminal.



UKI....Looking at the nighttime satellite, the deepened marine layer
is pushing close to the valley on the western slopes. Stratus has
reached the northern inland area Ells Field airport in Willits, but
has not breached the UKI valley yet. There continue to be low
chances (15%) for a MVFR ceiling to make it over the terrain early
this morning. Otherwise, VFR will prevail at this terminal.

&&

.Marine...Northerlies have increased over the waters this morning
behind a passing trough. Winds will again become more focused in
the southern zones where 20 to 25 kt winds will develop this
afternoon. Short period seas will locally develop 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 has been extended 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, up to 25 kts in the southern zones into early next week,
with lighter northerlies elsewhere.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from 2 PM this afternoon to 9 AM PDT
     Sunday for PZZ455.

     Small Craft Advisory from 9 AM this morning to 9 AM PDT
     Sunday for PZZ470.

     Small Craft Advisory from 9 AM this morning to 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