144
FXUS66 KEKA 091053
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
353 AM PDT Thu May 9 2024

.SYNOPSIS...A continually building Pacific ridge of high pressure
will continue to bring warm temperatures and gusty N to NE winds
through the end of the week. This combination of elements will allow
for unseasonably warm and possibly record high temperatures closer
to the coast, but also for interior valleys. A cooling trend is
expected by the weekend.


&&

.DISCUSSION...High pressure continues to build into the Pacific
Northwest as an upper level low slowly retrogrades to the southwest
over the Central Rockies. This has created a tight pressure gradient
across the area causing gusty north winds for coastal areas and over
the higher terrain. These winds remain elevated into mid-morning
over the higher terrain areas, especially SE Trinity, NE Mendocino
and Lake counties. The wind advisories remain on track to expire by
mid morning. Valleys and coastal areas have mostly decoupled causing
winds to continue to be light into the morning. Frost is not
expected for most areas, although the coldest spots could approach
the upper 30s early this morning.

Offshore flow is expected to keep all the stratus away from the
coast while very few river valleys are likely to see any fog or
stratus. Today, the low pressure over the Rockies continues to
drop south which will gradually cause the pressure gradient to
ease with overall winds decreasing through the day. Temperatures
will continue to warm into the end of the work week as high
pressure builds. Inland temperatures are anticipated to peak near
90 in the warmer valleys. As the winds diminish and become
northeast and offshore, warm temperatures will likely develop
along the coast. Temperatures may peak around 70. A few locations
could reach the mid or upper 70s briefly early in the afternoon
today and/or Friday.

By Saturday, the ridge axis is forecast to move east. Thus, stratus
will be allowed to move up the coast. Although, Saturday will likely
be a transitional day where stratus will most likely not become
expansive. This will likely just cause cooler temperatures in
coastal and near coastal areas.

By the late weekend and early next week, a weak shortwave is
forecast to move by the region to the north. This may be enough to
spark a shower or two over eastern Trinity County. Also, there is a
ten percent chance of thunder, as of now. This shortwave could
also bring drizzle to the coast. Into the early to middle of next
week, high pressure is expected to build back in with inland
temperatures warming back into the 90s and coastal temperatures
into the low 60s. /MKK & /JLW


&&

.AVIATION...VFR and clear skies have prevailed overnight as offshore
winds continue aloft. These offshores are driving LLWS across the
region as the surface has decoupled overnight...apart from coastal
Del Norte (primarily KCEC) where northerly winds have continued
overnight. Some brief MVFR haze may develop around the Humboldt Bay
region early this morning, possibly impacting KACV...otherwise VFR
is expected to continue through the TAF period.


&&

.MARINE...Northerly winds and seas rapidly diminish across all
zones this morning as the strongest northerlies drift further
offshore. Winds remain mostly northerly through the weekend,
weakening overnight and restrengthening to around 10 to 15 kts each
afternoon. Northerlies are forecast to strengthen once again late
this weekend and early next week, with another round of gales
possible sometime between Monday and Wednesday. A few small NW and S
swells move through the waters over the next week, however seas
remain primarily locally generated.


&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Wind Advisory until 9 AM PDT this morning for CAZ108-111-
     114-115.

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

     Small Craft Advisory until 3 PM PDT this afternoon for
     PZZ470-475.

&&

$$

Visit us at https://www.weather.gov/eureka

Follow us on Facebook and Twitter at:
https://www.facebook.com/NWSEureka
https://www.twitter.com/NWSEureka

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