Area Forecast Discussion
Issued by NWS Eureka, CA
FXUS66 KEKA 032244
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
244 PM PST Sat Dec 3 2016
.SYNOPSIS...A high pressure ridge has produced dry weather across
the region tonight with slightly warmer temperatures occurring.
A weak cold front will move across the region Sunday producing a
chance for rain across the area. The showers will slowly advance
from the northern areas southward on Sunday. Another weak front
will move across the region Monday afternoon and evening.
.DISCUSSION...A high pressure ridge will maintain dry weather
across the region through tonight with slightly warmer
temperatures occurring. A weak cold front will move across the
region Sunday producing a chance for rain across the area. The
showers will slowly advance from the northern areas southward on
Sunday. Another weak front will move across the region Monday
afternoon and evening.
Early morning temperatures will increase slightly Sunday morning.
Cloudiness will increase Sunday as the cold front approaches and
showers move across the region. A frost advisory will not be
light rain and some wintry weather with lower snow levels will
occur Monday night as the next weak system moves through the
region. Drier conditions will prevail across the region Tuesday
and Wednesday as a high pressure ridge briefly builds across the
A stronger, warmer and more moist cold front will move across the
region producing light to moderate rain Thursday and Thursday
night. The rain chances will be greater Thursday night with this
.AVIATION...High pressure aloft and northerly flow helped erode away
coastal cloud cover this afternoon with mostly VFR conditions
expected to prevail into the evening. Another weak front will
approach the region tonight bringing some possible rain, especially
to KCEC, late Sunday morning. This will cause mid and upper cloud
cover to increase overnight into Sunday. Some lower ceilings still
may develop around Humboldt Bay late tonight bringing MVFR
conditions to KACV, KFOT, and KNLN. Confidence is moderate in this
however, thus hinted at scattered MVFR decks for late tonight.
Otherwise conditions should deteriorate further with the onset of
the light rain Sunday morning especially for coastal/near-coastal
airfields northward of Cape Mendocino. /KML
.MARINE...The marine environment will deteriorate as a large
northwest swell builds across the waters today bringing 15 to 16
foot seas to the region this evening. This will bring hazardous
breaking waves across the Humboldt Bay bar. In addition to the
swell, fresh to strong north winds will bring steep wind-driven
waves to waters primarily south of Cape Mendocino. Lighter winds to
the north may generate a light chop on top of the swell. Fortunately
the swell will begin to subside tonight through early next week. It
is possible that the swell may be a bit slower to subside on Sunday
but otherwise expect waves around 9 to 11 feet around 12 seconds
Monday and Tuesday. Wednesday is forecast to have the lowest sea
state before a quick hitting front brings near gales and building
seas late Wednesday night into Thursday. The second half of next
week becomes a little more uncertain with models falling out of
agreement in regards to oncoming storm systems. Bouts of stronger
winds and building swell systems will be likely, although, the
timing is still unclear right now. /KML
.BEACH HAZARDS...A large northwest swell will bring large surf to
northwest California coastal zones with breakers approaching 20 to
23 feet through this evening. Beachgoers should stay much farther
back from the water and avoid rocks and jetties completely today.
Fortunately the swell will diminish tonight through early next week
bringing smaller surf. Beachgoers should still check the forecast
before heading to the beach. /KML
CA...High Surf Advisory until 10 PM PST this evening for CAZ104-109.
High Surf Advisory until 7 PM PST this evening for CAZ101-103.
NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory until 3 AM
PST Tuesday for PZZ450-455-470- 475.
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