Clearlake Oaks, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

222
FXUS66 KEKA 041213
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
413 AM PST Wed Dec 4 2024

.SYNOPSIS...Coastal stratus and fog are increasing along the North
Coast, but full sunshine above average daytime temperatures will
prevail elsewhere. A weak, shortwave will move through the region
Wednesday night and Thursday, possibly generating some light
showers or drizzle. Chances for rainfall or drizzle increase again
through the weekend with a quick passing front.


&&

.DISCUSSION...A strong ridge of high pressure is firmly in place.
Daytime highs are warm and above average, with interior valleys
reaching the mid 60s to up to 70. Coastal stratus and fog, which
has been observed to be dense at times, have developed and will
continue increasing in coverage. This will suppress highs for
portions of the coast. A weak shortwave will clip the region
tonight into Thursday, mainly increasing cloud cover. Some light
showers and coastal drizzle will be possible, but precipitation
accumulation will be unlikely for most of the area south of the OR
border.

The ridge will further amplify late this week, and daytime highs
will be warm, pleasant and much above climatological averages. A
stronger system will impact the Pacific Northwest through the
weekend, with some of it likely clipping N CA with the passing of
a front. Probabilities for a wetting rainfall over a tenth for an
inch go up to 40 to 65% for far North Humboldt and Del Norte
counties. There is a 20 chance for over 0.3 inches through Del
Norte County Saturday. Chances for lingering showers carry
through Sunday. Cluster and ensemble members show strong evidence
the trough will then drop into the Great Basin as an inside
slider going into next week, and this pattern is favorable for
amplified offshore winds. /JJW


&&

.AVIATION...With high pressure continuing to build into Northern
California, shallow stratus development is forming along the coast.
As of 3:45AM, there is extensive stratus development along the
Mendocino Coast and around the Humboldt Bay region. As a result,
LIFR to IFR conditions could be likely into mid morning for coastal
terminals. However, at both KCEC and KACV, intermittent and light
offshore flow could still aid in keeping the stratus off the coast
for a time. Reversal southerly flow just along the coast could help
bring the extensive stratus at the Mendocino Coast all the way up to
the Del Norte Coast through today. By this evening and overnight,
the stratus could be widespread along all of the North Coast.

Interior valleys will continue to be foggy/misty into mid morning,
particularly the Trinity and Eel river valleys. There is a potential
for MVFR conditions around KUKI, but models indicate that VFR
conditions are expected for most of the forecast period. /JLW


&&

.MARINE...Light to gentle northerly breezes will continue through
the middle of the week. Winds will shift southerly north of Cape
Mendocino by tonight as a weak frontal system moves through. On
Thursday, northerly winds will redevelop with moderate to fresh
breezes possible south of Cape Mendocino.

A short-period N wave at 4 to 5 feet is expected to subside this
afternoon. A long-mid period W swell will continue to decay through
this morning, followed by mid-period W swell that will arrive this
afternoon and will peak late tonight and early Thursday at 6 feet. A
forerunner of the westerly swell trains will traverse the waters
through the weekend.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
None.
&&

$$

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