177
FXUS66 KEKA 221900
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1200 PM PDT Thu May 22 2025

.SYNOPSIS...Upper level disturbances for the rest of this week and
weekend will bring cooling temperatures. Another period of warm
temperatures and high pressure return this weekend before another
chance for light rain Sunday into Monday.


&&

.DISCUSSION...Thursday and Friday broad/weak troughing will drift by
to our north, but will not have much more effect than mid level
cloud cover and cooler temperatures, especially in interior valleys.
The chance of isolated thunder Friday afternoon is becoming less and
less likely for eastern Trinity county with minimal moisture
available to initiate convection. High amplitude ridging is expected
to return Saturday and Sunday, allowing temperatures to briefly
rebound into the 70`s and 80`s. Long range models are becoming more
confident in another upper trough and surface frontal system
clipping the region late Sunday into Monday. NBM indicates 30 to 40%
probabilities for >0.01 inches, most likely Monday morning should it
occur. This is forecast to be followed by more warming mid next
week.


&&

.AVIATION...High pressure will wedge back into Northwest
California during this TAF period. This afternoon and into the
evening, north to northwesterly winds will pick up at most all
area terminals. In southern Mendocino and Lake counties, gusts to
20 knots are likely into this evening. Late this evening and into
early Friday, marine stratus is projected to develop under an
inversion, mostly around the Humboldt Coast north of Cape
Mendocino. There could be southerly reversal winds around the Del
Norte Coast which brings the possibility of stratus moving into
KCEC. HREF indicates about a 20 to 30 percent chance for MVFR
conditions at KCEC by early Friday morning. MVFR conditions are
most likely at KACV by early Friday morning; however there is a 50
to 60 percent chance for IFR ceilings and a 25 to 35 percent
chance for LIFR ceilings. KUKI is expected to remain VFR. /JLW


&&

.MARINE...Northerly winds will increase again as high pressure
builds back over the Pacific throughout today and into Friday. As a
result, small craft winds and seas are forecast for the southern
waters Friday and Saturday. Another weak system will approach the
region over the weekend allowing winds to decrease again and
possibly even turn out of the south briefly in the northern waters
by Sunday. Northerly winds and steep seas are projected to increase
again by the middle of next week as high pressure builds back into
the region. /RPA /JLW


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from 3 PM Friday to 3 PM PDT Saturday
     for PZZ455-475.

&&

$$

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