Weather Service Report


004 
FXUS66 KEKA 231236
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
436 AM PST Sun Feb 23 2020

.SYNOPSIS...A weak cold front will bring light rain and drizzle
to primarily Del Norte and northern Humboldt counties today. High 
pressure will spring back and provide dry weather next week.

&&

.DISCUSSION...A weak cold front to our NW will push across NW 
California today. HREF continues to indicate light rain/drizzle 
starting in Del Norte county this morning, spreading southward to 
Humboldt Bay and vicinity around noon or shortly thereafter. 
Measurable precip is expected, with amounts no more than a tenth 
or two. Otherwise, the front is expected to produce mainly cloud 
cover, cooler temperatures as well as breezy NW winds this afternoon
and evening. High pressure will quickly build this evening and 
put an end to the light precip. 

High pressure will dominate NW California weather next week. 
Temperatures in the interior will start to rebound on Monday, and 
then climb through the week. Highs in the 70s are expected for 
southern interior Mendocino county. Coastal areas, particularly 
the North Coast, will probably not see much warming til mid or 
late in the week when the northerly breezes abate and an inverted 
trough develops along the coast. Even with the "mild" temperatures,
interior valleys will likely dip below freezing each and every 
morning next week, primarily in Trinity county. 

The dominant offshore ridge appears to weaken slightly next 
weekend. Consensus is for large scale cooling next weekend. There 
continues to be large spreads in the models. Confidence we are 
going to see substantial precip remains low. Granted we could 
very well see a transient system, however there are indications 
that the ridge will just pop back up in the wake of a cold front 
that may move through NW California next Sunday. 

&&

.AVIATION...A weak frontal system will bring very light rain and 
MVFR ceilings to northern Humboldt and Del Norte counties today. 
Otherwise mostly VFR conditions will prevail with lifting ceilings 
in Humboldt and Del Norte counties late this afternoon/evening. 
Winds will be generally light. /RPA

&&

.MARINE...A weak front will move through the waters today with 
moderate north winds redeveloping this afternoon. Additionally a 
large northwest swell will build into the waters with sea heights 
reaching 12-14 feet overnight into Monday. The swell will subside 
Monday night into Tuesday but steep northerly waves will develop as 
the north winds increase. Thus, small craft advisories returning 
this evening that currently expire early Tuesday morning as the 
swell subsides may need to be extended depending on model trends. The 
north winds are forecast to persist through the remainder of the 
week, though they should decrease in strength over time. /RPA

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...None.
NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory from 
7 PM this evening to 3 AM PST Tuesday for PZZ450-470. Small Craft 
Advisory from 1 AM Monday to 3 AM PST Tuesday for PZZ455-475.

&&

$$

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Western Regional Climate Center, wrcc@dri.edu