Area Forecast Discussion
Issued by NWS Eureka, CA
FXUS66 KEKA 261100
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
400 AM PDT TUE JUL 26 2016
.SYNOPSIS...Strong high pressure will bring a significant warming
trend through mid-week with triple digit temperatures across
portions of the interior. Coastal areas will continue to see a
mix of clouds and sun as the marine layer fluctuates in depth.
.DISCUSSION...The upper level ridge continues to build over the
region this morning. This has compressed the marine layer
slightly. The northerly winds have kept the Mendocino and far
southern Humboldt coasts mostly clear this morning. Farther north
and up the Eel river valley there is quite a bit of cloud coverage
this morning. This afternoon skies will likely clear back to the
coast a bit quicker today, although they may return quickly this
evening. Temperatures inland will warm several degrees over
yesterday. Ukiah is expected to around 105 and Weaverville around
Tonight into Wednesday there looks to be only a few subtle
changes. The marine layer will likely continue to compress as high
pressure strengthens. South of Cape Mendocino the wind pattern
shifts to weak southerly winds by Wednesday morning. This may
keep clouds in most of the day along the Mendocino coast. Farther
north some offshore flow may help to clear out skies in the
afternoon and Crescent City may even stay clear overnight.
Temperatures across much of the area will remain warm and fairly
steady from Tuesday. These conditions will persist on Thursday
and Friday as well.
Saturday through early next week an upper level trough moves over
the west coast. This is expected to deepen the marine layer, cool
off temperatures inland and could bring a shower or two to Trinity
county. The thunderstorm potential looks minimal, but it is hard
to rule out completely. For now just have a few showers in the
forecast for Saturday afternoon and will continue to monitor this
as it gets closer. Temperatures inland will cool off with this
trough as well. MKK
.AVIATION...VFR TO IFR conditions and light winds to calm
conditions will continue at KCEC and KACV this morning. The lower
conditions will be due to stratus and patchy fog reducing ceilings
and/or visibilities. LIFR conditions will occur at times early
this morning at KCEC due to fog reducing visibilities Visibilities
and ceilings will improve late this morning and this afternoon and
VFR to MVFR conditions will prevail at KCEC and KACV with light to
moderate winds occurring. VFR conditions and light winds to calm
conditions will continue at KUKI through Wednesday.
.MARINE...An offshore high pressure system and inland thermal low
pressure trough will strengthen today increasing the winds and
short period seas. The winds and seas will be higher across the
outer waters. Elevated winds and seas will persist across the
waters most of this week especially across the outer waters. Gale
warnings will continue across the southern outer waters through
early Wednesday morning and across the northern outer waters
through Wednesday evening. Small craft advisories will continue
across the near shore waters through Wednesday afternoon primarily
due to short period seas. Gale warnings may need to be extended
across the northern outer waters through Saturday due to
increasing offshore winds.
NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 2 PM PDT Wednesday for PZZ450-455.
Gale Warning until 9 PM PDT Wednesday for PZZ470.
Gale Warning until 3 AM PDT Wednesday for PZZ475.
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