Kelseyville, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

859
FXUS66 KEKA 202018
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1245 PM PDT Tue May 20 2025

.SYNOPSIS...High pressure is expected to build today and Wednesday
warming temperatures and clearing skies. Late in the week an
upper trough near the area is expected to bring cooler
temperatures and more coastal clouds. Warming is expected again
for the weekend.

&&

.DISCUSSION...High pressure is building into the area. This is
helping to clear skies fairly quickly this morning. This afternoon
breezy conditions are expected, especially along the coast. Gusts
of 25 to 30 mph are expected over the windiest areas. Tonight some
stratus is expected to return, but it looks like it will just be
patchy along the Humboldt coast. The Del Norte coast is expected
to see slightly more offshore flow keeping the stratus away. The
Mendocino coast is also expected to stay more clear. Wednesday is
expected to be the warmest day of the week with high pressure
overhead. Heat risk is only expected to be minor even in the
warmer valleys.

Wednesday night and Thursday morning a trough is expected to bring
a return of more coastal clouds. A second trough Thursday night
into Friday morning is expected to reinforce this first one,
likely The precip is generally expected to remain north of the
area, but some drizzle is possible, especially overnight. The NBM
shows only a 10 percent chance of measurable rain. These troughs
also look too dry for any thunderstorms to form, the potential for
that lies well to the east of the area. Inland temperatures will
be cooler, likely in the 70s.


High pressure is expected to build in over the weekend again. This
should diminish the marine layer clouds and allow temperatures to
warm back close to 90 again. The NBM shows only around a 10
percent chance of high temperatures exceeding 90 degrees. Early
next week there is the potential for another trough and possibly
some rain. Three of the 4 ensemble clusters show at least a little
rain on Monday. However the NBM shows only a 25 percent chance of
measurable rain in the north and less than a 15 percent chance of
a tenth of an inch. MKK

&&

.AVIATION...Gusty northerly and northwesterly winds and shallow low
level turbulence and/or low level speed shear expected tonight,
especially along the coast and over the transverse coastal mountains
(King Range). Otherwise, mostly clear skies and VFR conditions are
expected to prevail for all forecast terminals. Low cloud cover and
IFR or LIFR conditions will most likely develop in north coast river
valleys overnight under higher stability and warming air aloft.
There is a low chance (40%) for MVFR cigs to spread out over KACV
mid to late this evening and lower chances for a few hours or less
for LIFR in mist and haze at CEC and ACV early Wed morning. DB

&&

.MARINE...Northerly winds and steep waves continued to increase
today. HREF probabilistic guidance continues to support peak gusts
to 35-40kt in the lee of Cape Mendocino as an expansion fan reaches
maximum coverage late this afternoon into the evening hours. Another
wind speed max is also forecast to develop late this afternoon and
early evening across the northern waters; around and just downwind
of Pt St George. Coverage appears minimal to support a gale warning
for the northern waters at this time. Steep northerly waves of 6 to
8 ft in the northern waters and 9 to 11 feet in the southern waters
on top of a NW swell around 7 to 9 ft will yield combined wave
heights of 9 to 11 ft in the northern waters and 11 to 14 ft in the
southern waters tonight through Wed AM. Small craft advisories are
in effect and inexperienced mariners should avoid going out in these
wave conditions. Seas are forecast to remain elevated and hazardous
on Wednesday due to this same wave combination, though northerly
winds should lay down some. Wind and waves are forecast to ease up
toward the end of the week and perhaps into the weekend. It will not
take much of a gradient for wind gusts to reach 25-30 kt and for
steep wind waves to reach 6 ft for the southern waters and
advisories for small craft may still be warranted. A couple of long
period swell groups arrive over the weekend; one from the SW and
another from the WNW. These swell groups do not appear all that
energetic to pose a moderate or extreme risk for sneaker waves at
least in our waters over the weekend. It will need to be monitored
for possible beach hazards for S and SW faces shores. Otherwise,
quieter and fairly tranquil marine conditions are expected over the
holiday weekend. DB

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from 3 PM this afternoon to 3 AM PDT
     Wednesday for PZZ450.

     Small Craft Advisory until 9 PM PDT Wednesday for PZZ455.

     Small Craft Advisory until 9 PM PDT Wednesday for PZZ470.

     Small Craft Advisory until noon PDT today for PZZ475.

     Gale Warning until 3 AM PDT Wednesday for PZZ475.

&&

$$

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