Upper Lake, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

615
FXUS66 KEKA 290722
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1222 AM PDT Mon Jun 29 2026

.SYNOPSIS...Seasonably warm and dry conditions will build through
midweek with gusty north wind along shore each afternoon.


&&

.KEY MESSAGES...

-Gusty north winds each afternoon along shore through mid week.

-Gradual warming and drying trend.

-Temperatures turn hotter over the holiday weekend

.DISCUSSION...Temperatures warm Monday behind a dry, southward
passing shortwave disturbance. If there was available moisture with
this passing perturbation, nocturnal thunderstorms would be
possible. Interior valleys warm to the mid 80s to 90 degrees Monday
afternoon. The northerly winds gusted in excess of 30 mph along the
coast Sunday, with higher strength gusts along Cape Mendocino and
Point St George. Very similar conditions as described will continue
through mid week.

The strong Pacific high responsible for this pattern begins breaking
down Thursday. A weak trough may move through late Thursday through
Friday, with little impact expected other than some potential light
drizzle. Interior temperatures look to quickly rebound through next
weekend behind the trough as a desert southwest high strengthens in
advance of a stronger Pacific trough. There are high probabilities
for high temperatures over 90 Saturday and Sunday for the interior
valleys. Probabilities quickly lower for highs over 95 outside of a
couple of the hottest valleys. This would result in some minor
HeatRisk.


&&

.AVIATION...Northerly winds eased overnight Sunday. The well-mixed
and dry environment will extend the period of VFR conditions, with
the exception of around Humboldt Bay. Some stratus formed around
Humboldt Bay again, with MVFR to IFR ceiling levels. Coverage and
duration of ceilings will be very limited from expected light
easterly winds. Winds will continue to be the main concern as they
quickly increase Monday, with gust 20 to 30 kts expected again at
the coastal terminals. Higher gusts will occur near Point St George
and CEC.


&&

.MARINE...Strong northerly winds are over the waters while steep
seas build in response. Gale Warnings remain over the outer waters,
but gale conditions can be expected around Point St George and Cape
Mendocino. The proximity of gale conditions to the inner zones will
favor poorly modeled large to hazardous seas to pulse into the inner
waters at times, as is being observed. The greatest threat for this
will be over the late Monday, Tuesday, and Wednesday after maximum
afternoon winds are achieved. A Hazardous Seas Warning has been
issued to cover this threat given what was observed Sunday night.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 8 PM PDT this evening for PZZ450.

     Hazardous Seas Warning from 8 PM this evening to 11 AM PDT
     Wednesday for PZZ450.

     Small Craft Advisory until 11 PM PDT this evening for
     PZZ455.

     Hazardous Seas Warning from 11 PM this evening to 11 AM PDT
     Wednesday for PZZ455.

     Gale Warning until 11 AM PDT Wednesday for PZZ470-475.

&&

$$

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