741
FXUS66 KEKA 071149
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
449 AM PDT Fri Jun 7 2024

.SYNOPSIS...Temperatures will begin to ease today with seasonable
conditions persisting through the weekend. Above normal temperatures
will return early next week.


&&

.DISCUSSION...High temperatures peaked yesterday with the hottest
valleys such as Big Bar and Ukiah reaching above 100 for the first
time this year. Even overnight, some elevated lows have stayed above
70, especially in Lake County. Despite hot temperatures enhancing
the coastal inversion, a passing upper level shortwave has provided
enough lift to keep the coast mostly clear overnight.

Weak high pressure will allow temperatures to begin easing today
with interior valleys returning to the mid to low 90s. Increasing
westerly wind ahead of an upper level trough will also help push
marine influence back further inland. Despite weakened surface
heating, growing upper level support will allow for another very
slight chance (less than 15%) of isolated thunderstorms today over
the Trinity Alps.

Temperatures will bottom out over the weekend with interior highs in
the mid 80s, very close to climatological normals. Westerly onshore
flow along with some upper level lift will create only inconsistent
and lifted marine stratus into the weekend. Where marine stratus
does form, however, shallow convection will help promote patchy
coastal drizzle. No wetting rain is expected for the interior with
lessening instability gradually dropping the chance of isolated
showers and thunderstorms through the weekend.

Ensembles consistently show a very tilted trough brining another
brief warming drying period back to the area early next week. The
nature of the system will make warming weak and short lived,
however, with NBM only showing a 10 to 30% chance of any
temperatures over 100 any time. Though not a particularly strong dry
pattern, there remains essentially no chance of any wetting rain
through next week. /JHW



&&

.AVIATION...Conditions at CEC have remained largely IFR overnight
with some persistent low clouds and on and off visbility reductions.
ACV has remained VFR most of tonight, but some IFR conditions with
low cloud cover is not out of the question before sunrise.
Conditions are expected to quickly improve at the coastal terminals
to VFR by mid-morning. HREF is showing probabilities for stratus
returning tonight into Saturday morning: 40% for CEC and 70% for
ACV, which will bring IFR to LIFR conditions. Conditions at UKI are
expected to remain VFR today, with light winds with some high
clouds. JB


&&

.MARINE...Northerly winds continue to be gusty in the outer waters,
providing steep northerly wind waves of around 10-12 feet at 7-8
seconds, with the steepest waves in the outer waters. Wind waves are
combining with a diminishing WNW swell currently around 5-7 feet at
11 seconds to create a chaotic sea state. This WNW swell will
continue to diminish today. Gusty northerlies will slowly diminish
into the evening, especially north of Cape Mendocino. South of Cape
Mendocino, localized gusts over 30 knots are possible through the
day into Friday night.

Winds will peak again across all the waters late Saturday into
Sunday, with northerly gusts over 30 knots possible across all the
waters. Steep, hazardous seas will accompany the increase in wind. A
mid-period westerly swell will fill in around 7 feet at 14 seconds,
Saturday night into Sunday morning, producing a very turbulent sea
state along with significant wave heights of up to 12 feet. JB


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 9 PM PDT this evening for PZZ450.

     Small Craft Advisory until 3 AM PDT Sunday for PZZ455.

     Hazardous Seas Warning until 3 PM PDT this afternoon for
     PZZ470-475.

&&

$$

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