744
FXUS66 KEKA 112200
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
300 PM PDT Mon May 11 2026

.SYNOPSIS...


&&

.KEY MESSAGES...

- High interior temperatures peaking Today with moderate HeatRisk
  in Trinity, Mendocino and Lake Counties.

- Cooler temperatures and coastal drizzle Tuesday.

- Light rain and sprinkles forecast on Tuesday night and Wednesday
  morning for Del Norte and Humboldt counties, mostly dry weather for
  areas farther east and south.

- Breezy to gusty winds this  weekend.

&&

.DISCUSSION...Warmer and drier weather conditions are being
observed this afternoon as the high pressure dominating the West
Coast slowly shifts eastward. As a result, daytime temperatures
across the interior are running up to 15 degrees warmer compared
to yesterday`s readings. Meanwhile, coastal stratus continues to
oscillate along the immediate coast, keeping temperatures near
seasonal norms along the coast. Tonight, a deepening marine
layer is expected to develop, aiding in patchy drizzle within a
deeply saturated layer into Tuesday.

An approaching shortwave trough will bring a cooling trend
beginning on Tuesday. However, high temperatures will remain
above normal across the interior on Tuesday. An associated
progressive cold front will bring light rain and sprinkles to the
northern coastal range Tuesday night through Wednesday morning,
especially in Del Norte and Humboldt counties. Lingering showers
are expected to taper off Wednesday afternoon. Mostly dry weather
is expected to prevail for areas farther east and south. Inland
high temperatures forecast on Wednesday are expected to be in the
60s to low 70s.

Late in the week the flow generally becomes more zonal keeping
temperatures near seasonal normals with a marine layer in place.
A rebound in high temperatures are expected on Tuesday as a weak
ridge build in. This will promote warm and dry weather conditions,
with interior highs in the upper 70`s to mid 80`s. Ensembles and
deterministic models suggest a weak frontal system clipping the
northern portion of the area Friday and into the weekend, with the
potential of interior highs cooling down again to the 70`s.
Breezy northwest winds are expected each afternoon. The strongest
winds look to be around 25 to 35 mph over the weekend. There is
higher than normal uncertainty on this weather pattern. With the
fairly fast zonal flow to the north of us, there will be some weak
shortwaves moving through this flow. These may bring fluctuations
in the temperatures and wind speeds. At this point very few
solutions are showing rain. /ZVS


&&

.AVIATION...Skies are attempting to scatter out today over the
coastal terminals, interrupting LIFR/IFR conditions at KCEC with an
occasional VFR period. Tempo groups may need to extend a bit longer
into the evening TAFs to compensate as the coastal stratus is
observed from the satellite geocolor feed, compressing as it
elongates southward as of 20z. KACV has remained locked into IFR
with overcasts skies and ceilings 600-800ft. Periods of VFR are
likely for KACV and KCEC into the early evening hours. KUKI looks to
have prevailing VFR conditions through the TAF period with light
southerly winds, according to GFSLAMP guidance. /EYS


&&

.MARINE...The northerly winds continue to diminishing and pushing
off the coast through tonight. The steep wind driven waves will
gradually diminish as well. A northwest swell around 5 to 10 feet
at 11 seconds is combining with these wind driven waves.


These winds continue to diminish on Tuesday to be around 5 to 15
kt. The northwest swell continues to be around 5 feet Tuesday and
is expected to continue Wednesday and Thursday. Wednesday and
Wednesday night high pressure starts to build back into the area
and northerly winds will slowly pick up again. The winds are
expected to gradually increase into the weekend. Confidence
remains lower than normal with increased uncertainty on the large
scale pattern. MKK


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 3 AM PDT Tuesday for PZZ455.

     Small Craft Advisory until 9 PM PDT this evening for PZZ470.

     Small Craft Advisory until 5 AM PDT Tuesday 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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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png