Scientific Forecaster Discussion
fxus66 keka 271139
Area forecast discussion
National Weather Service Eureka California
439 am PDT Thu Apr 27 2017
Synopsis...building high pressure off the West Coast will bring
drier weather to the coast and warmer temperatures to the
interior. Spring Time northerly winds will be observed along
the coast during the afternoon and early evening periods. The
drier weather is expected to persist into next week.
Discussion...Spring like weather finally arriving to northwest
California as a fairly strong ridge of high pressure builds over the
eastern Pacific. The overall trend this weekend into early next
week is for warmer temperatures, dry weather, and even sunny
skies across northwest California. Typical gusty northerly winds
are also expected along the coast during the afternoon and early
evening periods. With 500mb heights reaching near 580dam have
removed the light pops for the weekend and gradually reduced cloud
cover as well. The ridge axis is expected to cross the north
coast early next week and with that some light offshore flow
should also follow. Thus coastal stratus looks less likely.
Aviation...drier weather will lead to VFR conditions across
northwest California today. Models try to hint at lowering ceilings
for coastal terminals for tonight and tomorrow morning. Have kept
VFR conditions in the forecast for the time being as confidence
isn't terribly high in MVFR conditions for the later part of the
Marine...forecast remains on track this morning with high pressure
taking over the forecast. The pressure gradient will be tightening
over the waters for the next couple of days thus wind speeds will be
increasing. 25 to 30 kt gusts will become common by across the
waters by Thursday evening and then persist through the weekend. A
fresh northerly sea component will develop during this time frame
with 3 to 5 second period.
Additionally, there will be a mid period westerly swell that lingers
in our waters.
Northwest California coastal waters...Small Craft Advisory from 6 PM this evening to 3 am PDT Saturday
Small Craft Advisory until 3 am PDT Saturday for pzz455-475.
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