Area Forecast Discussion
Issued by NWS Eureka, CA

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FXUS66 KEKA 051216

National Weather Service Eureka CA
416 AM PST Mon Dec 5 2022

.SYNOPSIS...A low pressure system located over the North Coast
this morning will continue to brings periods of rain showers and
snow showers through Monday. A break in the active weather
pattern is then expected on Tuesday and Wednesday.


.DISCUSSION...A cold upper low is crossing the coast this morning
and will continue to slowly track southeast this afternoon and
Tuesday. This feature brought thunderstorms and periods of heavy
showers and gusty winds last night but as the trough axis moves
east of the coast...intensity in these precip bands will diminish.
At this time radar returns indicate a band of showers moving
across western Humboldt Co and northeastward into eastern Del
Norte and western Klamath counties. Currently snow levels appear
to be hovering around 3200 feet thus impacts to highway corridors
and elevated communities have been minimal. Meanwhile at the
coast, the thunderstorm activity has lessened considerably since
last night but there are a few cells off the coast that still
provide a rumble or some small hail through the morning hours as
they travel northeastward across the coastal areas and into the
coastal interior zones. Precip trails off later this afternoon and
early Tuesday as the low tracks southeast, with a period of dry
weather and cold nights expected midweek as weak ridging briefly
builds over the region. Another trough is then forecast to dig
over the west coast late this week and this weekend, potentially
bringing more precip late in the work week.


.AVIATION...VFR to MVFR conditions for all local terminals with
scattered to numerous showers moving across the area. Coastal
thunderstorm activity remains possible for KACV through
05/ well some VCTS will be possible for KUKI through the
same period. HIRES model guidance suggests that showers will
continue but gradually diminish later this morning. Winds have
been variable and occasional gusty at the coastal terminals
between showers. After 05/17Z winds are expected to become


.MARINE...Shower activity continues over the waters. Showers are
expected to diminish during the afternoon and evening. Isolated
thunderstorms and occasional gusty winds up to 30kts remain
possible along with a possibility of waterspouts through this
morning, mainly for south of Cape Mendocino. Weaker winds and
subsiding seas are expected today through mid week. Another
frontal system will bring increasing southerly winds by Wednesday
evening/night. A mid-period W swell will build across the waters
on Thursday night and peak on Friday to around 10 to 12 ft. A
larger mid-period W swell is forecast to arrive on Saturday.


     Winter Weather Advisory until 1 PM PST this afternoon for



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