690
FXUS66 KEKA 171151
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
451 AM PDT Mon Jun 17 2024

.SYNOPSIS...Dry weather is expected for the foreseeable future.
Interior temperatures begin a slow warming trend through the work
week, with another heat possible late this week and this weekend.


&&

.DISCUSSION...Latest satellite WV imagery is showing a shortwave
trough axis moving over N CA early this morning. Dry, cool air will
spread from north to south behind the passage of this feature,
drying out lower levels an acting to keep interior afternoon high
temperatures below climatological normal. This drier air has allowed
overnight lows to fall below normal in select valleys of southern
Humboldt and southern Trinity early this morning, with patches of
frost likely forming. The eastern perimeter of Lake and Trinity
counties may see some breezy N to NE winds today 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.

Otherwise, dry weather is forecast to persist for the next week.
Longwave troughing is forecast to continue aloft well into the work
week. 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.



&&

.AVIATION...The passage of a dry cold front associated with the low
pressure system to the north of the region has stifled coastal
stratus development overnight and into this morning. However, there
could still be some spotty stratus development around Humboldt Bay
and down the Eel River Valley creating potential for MVFR conditions.
But, despite this, with the sun rising and the increase of
northwesterly winds mid to late this morning, any stratus that may
have formed will dissipate. For all terminals, VFR conditions are
forecast through the TAF period with gusty northwesterly winds. HREF
indicates a high potential for gusts to 30 mph for the coastal
terminals and to 20 mph around Ukiah. Later this evening, winds will
die down in the region. /JLW


&&

.MARINE...Overnight, northerly winds have trended down over the marine
waters with the sea state remaining steep. Every zone except the
northern inner waters maintains small craft conditions as a result.
By late this morning, northerlies are expected to increase again
which will extend a small craft advisory for the northern inner
waters and a gale warning for the southern outer waters. Both HREF
and NBM indicate a high likelihood of gale force gusts in the lee of
Cape Mendocino throughout the day today and continuing overnight
tonight. Winds and steep seas will trend down into the middle of the
week. /JLW


&&

.FIRE WEATHER...NW winds have weakened overnight and are forecast to
turn NE this morning, ushering in a drier airmass and possibly
driving RH values into the low teens today. These winds are
expected to be the strongest on the eastern perimeter of Lake and
Trinity counties, with some gusts up to 25 mph possible in
eastern Lake county. The strong winds and low humidity will yield
an elevated fire weather threat, particularly for the south and
east side of Lake County. A Red Flag Warning remains in zone 264
(southern Lake) through much of today, primarily for the
possibility of rapid spreading grass fires. Winds are forecast to
turn NW again late this afternoon and this evening, which should
bring moisture to the area and improve recoveries tonight.
Lighter NW winds are forecast each afternoon for the upcoming week
across the interior, with afternoon RH values in the low 20s and
recoveries in the 50s to 70s.



&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Frost Advisory until 9 AM PDT this morning for CAZ106-108.

     Red Flag Warning until 8 PM PDT this evening for CAZ264.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from 9 AM this morning to 9 AM PDT
     Tuesday for PZZ450.

     Small Craft Advisory until 9 AM PDT Tuesday for PZZ455-470.

     Small Craft Advisory until 9 AM PDT this morning for PZZ475.

     Gale Warning from 9 AM this morning to 9 PM PDT this
     evening for PZZ475.

&&

$$

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