Westport, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

110
FXUS66 KEKA 292038
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
138 PM PDT Thu May 29 2025

.SYNOPSIS...Hot conditions will peak Friday and Saturday with gusty
winds along shore by Sunday afternoon. Generally warm and dry
conditions will continue through the start of June.

KEY MESSAGES:

-Hot conditions with highs over 100 across the interior and moderate
Heat Risk Friday and Saturday.

-Strong gusty winds near shore Sunday and Monday afternoon.

-Very slight chance (10%) of isolated dry thunderstorms over high
 terrain on Sunday.

&&

.DISCUSSION...A strong but narrow ridge of high pressure
is currently building over the area, bringing clear skies and hot
weather to the interior with shallow marine influence and nighttime
fog along the coast. Interior highs today have already soared into
the mid 80s by noon. Heat will most likely peak Friday afternoon
with max temperatures most likely to crest over 100 degrees for the
first time this year, especially around Ukiah, Clearlake and along
the Trinity River Valley. The confidence in some highs over 100 is
high (90 percent) but the overall risk drops to near 0 for any highs
over 105. Given the short nature of the event, the overall heat risk
is moderate. Marine influence and a strong sea breeze will keep the
immediate coast much cooler with marine air extending as high as
around 1000 feet in elevation.

High pressure will gradually eject south and east with a robust mid
level trough stalling over the eastern Pacific by Sunday. This will
setup a very strong pressure gradient along shore just over the
coastal waters. This will generate very strong north winds
throughout the waters but also in exposed areas along the coast.
Exposed ridges like in the King Range could see gusts as high as 50
mph, though stable marine air will generally limit gusts at low
elevations. Still gusts around 40 mph are most likely at low
elevations. There remains some slight potential (30%) for marginal
wind advisory conditions along the coast with gusts over 45 mph at
low elevations. The risk is greatest (60%) on headlands around
Crescent City.

The trough over the Pacific will weaken and move inland by the end
of the weekend and into early next week. As the trough moves inland,
there is some slight potential for isolated thunderstorms over the
interior Sunday or Monday afternoon. The overall chance is currently
low (10%) with lack of moisture being the main issue. Any storms
that do form, however, will be dry and may pose a fire weather
concern. Wind along shore will also gradually decrease after Monday,
though some moderate afternoon gusts remain most likely through
around mid week. Long range ensembles show generally high confidence
in warm, dry conditions continuing through the first week of June.
/JHW


&&

.AVIATION...After a weak frontal boundary passed through this
morning, VFR/MVFR conditions are expected through the day with some
exceptions at KCEC where mid and lower level clouds have reduced
conditions to LIFR with 2 statute mile visibilities with ceilings
<500ft as of 19z. This will only last a few hours. A low level
inversion could bring ceilings back down Friday morning at KCEC but
could also bring mist/low ceilings and lower visibility to KACV as
probabilities show a 40% chance of ceilings <500ft by midnight,
lasting into the late morning at KACV. Turbulence does not seem to
be an issue until Sunday at KCEC and KACV with stout northerlies
picking up and the Ellrod index with higher values, indicating (CAT)-
Clear Air Turbulence. Northerly winds and VFR condItions are
expected through the TAF period at KUKI. /EYS


&&

.MARINE...Northerly winds have gradually increased to 10kts or
so this afternoon from the morning lull. Winds will continue to
increase this evening bringing small craft conditions out 10 miles
from shore. Small craft advisories will start tonight in the outer
waters and continue into Friday with winds expected to remain fresh
to strong and move closer to the coastline by Friday afternoon.

Saturday strong to near gale force winds are possible with these
most likely south of Cape Mendocino. Have added gale watches to
highlight this. Saturday night and Sunday strong gales are likely
with the ECMWF, CMC, and GFS all showing close to 40 kt sustained
winds. Confidence is increasing on these as model agreement
continues to improve. The strongest winds are expected to be Sunday
afternoon or evening. There is some model guidance, including the
ECMWF model, showing that these will come in slightly later on
Sunday. Confidence is growing that this may be an extended period of
gale force winds. Some of the models are snow showing these lasting
through Tuesday afternoon.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Heat Advisory from 11 AM to 9 PM PDT Friday for CAZ105-106-
     110-113.

     Heat Advisory from 11 AM Friday to 10 PM PDT Saturday for
     CAZ107-108-111-114-115.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Gale Watch from Saturday evening through Sunday evening for
     PZZ450-470.

     Gale Watch from Saturday afternoon through Sunday evening
     for PZZ455-475.

     Small Craft Advisory from 9 PM this evening to 7 PM PDT
     Saturday for PZZ470.

     Small Craft Advisory until 1 PM PDT Saturday for PZZ475.

&&

$$

NOTE: The full forecast discussion is now regularly issued between
10 am/pm and 1 pm/am. Additional updates will be issued as needed.

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https://www.weather.gov/images/eka/zonemap.png