FXUS66 KEKA 242221

National Weather Service Eureka CA
321 PM PDT Fri Mar 24 2017

.SYNOPSIS...The unsettled weather pattern continues with a brief
break through late Saturday. The next storm system is expected in
the Sunday through Monday time frame...while Tuesday morning
looks to be dry, before another wet weather returns Tuesday night.


.DISCUSSION...Classic post frontal weather being observed across
NW CA this afternoon. Some light showers are being observed just
off the north coast with a mix of sunshine and clouds. The
interior is seeing a mix of clouds and sun as well with some
scattered showers that are displaying some more intense
characteristics with possible short duration heavy rainfall at
times. This pattern will continue through the evening before
relaxing a bit and drying out. Brief uppre level ridging will
build across the region for Saturday afternoon/evening, persisting
into Sunday morning. However, later on Sunday another storm
system passing by to our north will send its trailing cold front
through the region accompanied by gusty coastal winds will develop
ahead of it, with widespread rainfall developing along and behind
it. Another transient (brief) ridge of high pressure looks to
take up temporary residence for Monday evening into Tuesday
morning, before another system brings more light rainfall. As for
snow levels and temperatures, some higher elevation snowfall is
likely through Monday, with snow levels generally in the ~4000 to
5000 feet range. Much warmer air aloft will advect into the
northwestern California by the middle of the week, with snow
levels climbing well above 6000 feet. Temperature wise, afternoon
highs will mainly be near seasonal values, with lows close to
average for most of the forecast period. The one exception to this
will be when we're between systems, where decreased cloud cover
and light winds could allow morning temperatures to drop a few
more degrees. /PD/JT


.AVIATION...Conditions have returned to VFR across all terminals as
rain showers pushed east of the area. Winds this afternoon are
generally less than 10 kt. Do expect VFR conditions to continue
through tonight. There will be enough sky cover in northern
terminals of Crescent City and Arcata. However, for Ukiah there may
be enough breaks in the sky cover that some low clouds and fog can
form and potentially lower the flight category during the late
night hours. /RCL


.MARINE...Subsiding seas through this evening. Winds and seas remain
low through Saturday. Another weather front will lead to elevated
winds and seas from Sunday through Monday.

The weather front has pushed through the area this morning. Winds
have diminished to around 10 to 15 kt with occasional higher gusts.
Do expect the winds continue to remain fairly light this evening. We
were still dealing with some pretty healthy westerly swell during
the day today. The combined seas were up to 10 to 11 ft with wave
periods of 9 to 10 seconds. The swell will slowly decay through this
evening. Do expect the combined seas to drop to around 8 to 10 ft
through the overnight hours. Therefore, extend the pre-existent
small craft advisory through this evening.

Saturday will be a day of relatively low seas and winds day. The
next system to impact the area will be on Sunday. Right now, have
south winds in the small craft advisory level, with gale force wind
gusts possible. AFter that, high pressure will take control over the
area, and this will bring in generally light northwesterly winds
with westerly swell.

Changes to the previous forecast package is fairly minor. Used
ECMWF/GFS in refreshing the forecast package.


NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory until 9 PM PDT this evening for
PZZ450-455- 470-475.



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