379
FXUS66 KEKA 080703
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1203 AM PDT Mon Jun 8 2026

.KEY MESSAGES...

-  Rain on Monday for the North Coast, with the highest amounts
   north of Cape Mendocino.

-  Much warmer weather next week into the weekend.

-  Elevated fire weather conditions in Lake County with low
   afternoon relative humidity and gusty winds Wednesday through
   Thursday.

&&

.SYNOPSIS...Rain will return to the North Coast Monday with the
greatest amounts north of Cape Mendocino in Humboldt and Del Norte
counties. Dry conditions will return starting on Tuesday with hot
temperatures expected across the interior Wednesday into next
weekend.


&&

.DISCUSSION...

.SHORT TERM...(Through Thursday) A storm system is expected to
bring much needed rain to portions of the region on Monday into
Monday night. Rain will spread over Humboldt and Del Norte
counties in the morning hours. Rain will be generally light to
moderate with rain rates in Humboldt and Del Norte counties up to a
tenth of an inch an hour along the coast and higher in the
mountains from approximately 10 am to 5 pm. Rainfall totals could
approach an inch near Crescent City to as much as an inch and a
half in the mountains of Del Norte before the front finally sweeps
through Monday night. Rainfall totals will decrease toward the
south and inland with around a quarter inch in northwestern
Mendocino to only a tenth of an inch or less in eastern Trinity
and the rest of Mendocino County. Lake County could be the one
location in our forecast area that will see almost no rain at
all.

Behind the front an upper level ridge will quickly build over the
West Coast with 850 mb temperatures warming to around 25C by
Thursday. This will allow interior temperatures to warm
considerably, back to near or exceeding 100 degrees for many
locations. Additionally, the building ridge will enhance northerly
flow over the region and moderate offshore flow Wednesday through
Thursday will likely bring dry, offshore flow to Lake County. See
the fire weather discussion for more info.

.LONG TERM...(Friday through Monday) Upper level ridging is
expected to continue to build over the West Coast Friday into the
weekend. As the ridge builds the thermal trough may approach the
coast over the weekend allowing temperatures to warm at the coast.
Depending on coastal cloudiness and any southerly surges of
stratus, coastal areas could be quite warm Friday and Saturday
with highs approaching the 70 degree mark. Interior areas will
likely cap out around 100 degrees with 850 temperatures never
really warming too much more through the weekend.

&&

.AVIATION...A storm system will bring rain to ACV and CEC today
with ceilings falling into IFR and possibly LIFR as the day
progresses. Rain will be moderate at times with gusty south winds
in excess of 20 kt at CEC. Farther south and inland rain is
expected to be lighter but ceilings will also fall across much of
the area into MVFR or lower, except maybe in Lake County.
Conditions will improve gradually overnight but abundant moisture
along the Humboldt and Del Norte coastlines could leave low
ceilings and reduced visibilities into Tuesday morning.


&&

.MARINE...Northerly winds will decrease overnight and become
southerly as a storm system approaches the area. South winds will
briefly exceed small craft criteria during the day on Monday in
the northern zones with a few gusts to near gale possible. Winds
will be brief enough that the steep seas won`t have much time to
build considerably. Thus, only a brief period of small craft winds
and seas are expected Monday into Monday evening. The front will
shift through the area Monday evening leaving high pressure to
rebuild over the eastern Pacific and a thermal trough to build
over interior California. This will result in increasing
northerlies once again and a return to small craft north winds and
seas Tuesday into Wednesday and possible gales late in the week.


&&

.FIRE WEATHER...Wetting rains are expected in Del Norte and
Humboldt counties on Monday into Monday night. Dry conditions will
then return Tuesday into Wednesday with temperatures warming
considerably across the interior. By Thursday, high temperatures
could be exceeding 100 degrees in some interior valley locations.
At the same time, northerly flow is expected to enhance in the
northern Central Valley of California Wednesday morning into
Thursday. A slight offshore component will result in gusty
conditions in portions of Lake County. Afternoon relative humidity
values in the teens and poor overnight recoveries along with the
gusty winds in excess of 20-30 mph on the east side of the county
will result in an increased fire weather threat. Fuels still
remain marginal across the county which is holding back the
issuance of a Fire Weather Watch at this time, but depending on
how the storm tracks today, a watch may need to be issued
sometime in the next 24 hours.


.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from noon to 9 PM PDT Monday for
     PZZ450.

     Small Craft Advisory until 1 AM PDT Monday for PZZ455-475.

     Small Craft Advisory from 10 AM to 7 PM PDT Monday for
     PZZ470.

&&

$$

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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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png