097
FXUS66 KEKA 172223
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
310 PM PDT Mon Jun 17 2024

.SYNOPSIS...Dry weather is expected for the foreseeable future.
Breezy northerly winds decouple in the evening and become light
offshore flow component, with locally breezy over the exposed
ridges. Interior temperatures begin a slow warming trend through
the work week, with another heat possible late this week and this
weekend.


&&

.DISCUSSION...Dry, cold air is spreading from north and northwest
this afternoon as the passed shortwave trough continues to exit
eastward of NRN California. Temperatures are running up to 7
degrees cooler than yesterday`s reading as result. Inland highs
have been generally in the 70`s. A thermal trough developed near
this coast late this morning. This is promoting coastal breezy
northwesterly conditions this afternoon. Gusts from 20 to 30 mph
are expected over the coastal headlands and exposed ridges,
locally higher gusts up to 40 mph will be likely over the King
Range and Crescent City. The eastern perimeter of Lake and Trinity
counties are experiencing breezy north to northeasterly winds
while this dry air continues to spread southward, bringing a
slight risk for rapid spread of grass fires today, especially in
Lake county. See Fire Wx section for more details. Winds are
expected to decouple and become light offshore flow in the
evening, with locally breezy over the exposed ridges overnight.
This may yield to keep much of the coastal area free of low
clouds.

A surface high pressure will builds on Tuesday and bring a
gradual warming trend across NRN California, while the longwave
troughing is forecast to continue aloft well through Thursday.
Afternoon highs may creep back up to above normal late this
week as ridging noses in from the west, with a moderate heat wave
possible Friday and Saturday. Interior high temperatures in the
mid 90`s are expected to return across the warmer locations of
Trinity, Lake, interior Mendocino, and northeastern Humboldt. NBM
probabilities shows 50 to 75% for temperatures at 100 degree or
greater in the hottest valleys for Friday and Saturday.

&&

.AVIATION...All terminals are VFR this afternoon with gusty NNW
winds. Winds are expected to diminish this evening. Status looks
unlikely to form tonight, apart from the Eel River and parts of
Humboldt Bay. Clouds could make their way to Arcata and deterioate
conditions, but confidence is low. Any low clouds are expected to
quickly lift after sunrise. The afternoon will be breezy, with peak
winds of 15-20 kts at all the terminals - much weaker than today`s
winds. JB


&&

.MARINE...Winds remain breezy this afternoon in the waters, with
gale force gusts possible in the outer waters south of Cape
Mendocino through early Tuesday morning. Northerly winds will be
breezy Tuesday, especially in the afternoon, but lighter than
today`s winds, peaking at around 30 knots in the expansion fan south
of Cape Mendocino and 20 to 25 knots elsewhere. The nearshore waters
north of Cape Mendocino will see winds much lighter, with afternoon
breezes only to about 15 knots in the coming days, as conditions
remain breezy offshore. Both winds and seas look likely to increase
again late week. JB


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Red Flag Warning until 8 PM PDT this evening for CAZ264.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 9 AM PDT Tuesday for PZZ450.

     Small Craft Advisory until 3 PM PDT Wednesday for PZZ455-
     470.

     Gale Warning until 9 PM PDT this evening for PZZ475.

&&

$$

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