Weather Service Report


758 
FXUS66 KEKA 232144
AFDEKA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
244 PM PDT TUE AUG 23 2016

.SYNOPSIS...Slightly above normal temperatures across the
interior will become more seasonal through the second half of the
week as an upper trough slides over the Pacific Northwest. Coastal
temperatures will remain seasonal yet overnight and morning
cloudiness should persist over the next few days with clearing
skies possible each afternoon.

&&

.DISCUSSION...Inland temperatures across northwestern California
were slightly warmer than normal today with some of the hotter
valleys inland approaching the upper 90s. Coastal areas were more
seasonal with persistent clouds across the outer waters leaving
many parts of the immediate coast mostly cloudy through the
morning hours. Satellite imagery this afternoon showed the
stratus shifted just offshore which allowed much of the coast to
see some blue skies. This coastal cloudiness should continue over
the next few days with brief clearing possible each afternoon.

500mb heights will climb a few decameters as ridging moves in behind
the eastward shifting trough that is currently over the Pacific
Northwest. This will cause inland temperatures to increase but only
by a few degrees. Temperatures will decrease again late in the work
week and even fall below normal values by the weekend as the upper
trough dives over the region again. Although the forecast is
predicted to remain mostly dry through the week ahead, models
hint at some very minimal precipitation offshore. There is no
confidence in this system in producing wetting precipitation for
the area, at this time, but this does raise concern for
thunderstorm potential. Uncertainty is still high at this point so
no storms were added to the forecast. /KML

&&

.AVIATION...Shallow marine stratus and mist continues to
plague the immediate coast this afternoon. While ceilings and
visibilities at the CEC and ACV terminals have improved somewhat
this afternoon, LIFR ceilings and visibilities will return quickly
to both locations by late afternoon/early evening and persist
through the night. Much like today, expect widespread stratus in
most low-lying coastal areas to last into the early afternoon
tomorrow. VFR conditions will persist at UKI. /BRC

&&

.MARINE...Moderate to periodically strong northerly winds will
persist through most of the day Thursday. This will primarily apply
to the waters beyond 10 nm offshore, as a southerly flow reversal
will persist across the waters closer to shore. In these areas,
light to moderate winds will persist with an overall southerly
direction, although in the afternoons they will veer slightly to the
west in some areas. As a result, the steepest seas will remain
across the offshore waters, and in particular the northern offshore
waters where the strongest winds can also be expected. Near shore
areas can expect an elevated fresh swell to persist, although not
the the same height and steepness as the waters farther from the
coast. Locally higher winds and seas can be expected in the vicinity
of prominent capes and points such as Cape Mendocino/Punta Gorda and
Point Saint George.

On Friday, a low pressure system will help to weaken the pressure
gradient across the waters and pull it farther offshore. As this
occurs, light to moderate southerlies will expand in coverage and
eventually overtake the northerlies completely within 60 nm of
shore. This will allow seas to settle somewhat, although the broad
area of 15 kt southerlies will likely add in a bit of southerly
chop. These modest conditions will persist through the weekend. 
/BRC

&&

.EKA Watches/Warnings/Advisories...
CA...None.
NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory until 11 PM PDT Thursday for PZZ470.

     Small Craft Advisory until 9 AM PDT Thursday for PZZ475.

&&

$$

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Western Regional Climate Center, wrcc@dri.edu