Scientific Forecaster Discussion

Return to Local Conditions & Forecast

Without Abbreviations
With Abbreviations

Area forecast discussion 
National Weather Service Eureka California
424 am PDT Wednesday Apr 1 2015

Synopsis...a cooler air mass will persist across the region
through Thursday. Frost is possible in the interior valleys the
next few mornings. A cold front will move through the north west
California Saturday.


Discussion...a frost advisory is in effect through 8 am this
morning for the Mendocino coast and Mendocino interior (zones 2
and 76) as a cooler air mass has infiltrated into the region
allowing temperatures to decrease. However the lower temperatures
will be confined to a few cold spots in the Anderson Valley. Frost
will also be possible across portions of interior Humboldt and
del norte counties. A high pressure ridge will increase northerly
winds across the region tonight which will produce drier
conditions across the region. Temperatures will decrease to the
low to middle 30's tonight and Thursday morning. Therefore a frost
advisory is likely early Thursday morning for Mendocino County.
Temperatures will remain cool Friday morning. Rain chances
increase this weekend as a cold front moves through the area. The
front will move through the area Saturday followed by a low
pressure trough Sunday night into Monday morning. The low pressure
trough will maintain a chance fro rain across the area at times
Monday and Tuesday.


Aviation...mostly VFR conditions are expected for the next 24 hours.
Some shower activity is forecast to develop over the mountains east of
kcec this afternoon...perhaps moving S before diminishing. This
activity should stay east of the 2 airports...but will likely continue
vcsh. Northwest winds should increase during the afternoon at all taf
sites...with gusts over 20 kts. /Sec


Marine...after a brief lull in winds...northerlies will increase
again by this afternoon and gusts to gale force are expected to
spread across the S offshore waters. A Gale Warning continues in
this area until after midnight. Winds are expected to gradually ease
late tonight and Friday...but remain elevated over the S outer waters
into the first half of the weekend. The west-northwest wave train currently
around 8 feet at 13 seconds will slowly decay before another train
arrives later in the week. This will help maintain an elevated sea
state through the week. /Sec


Eka watches/warnings/advisories...
frost advisory until 8 am PDT this morning for caz002-076.

Northwest California coastal waters...
Gale Warning from 1 PM this afternoon to 1 am PDT Thursday for

Small Craft Advisory from 1 PM this afternoon to 9 PM PDT
Thursday for pzz450.

Small Craft Advisory from 1 PM this afternoon to 3 PM PDT Friday
for pzz470.

Gale Warning from 1 PM this afternoon to 3 am PDT Thursday for



Visit US at http://www.Weather.Gov/Eureka

Follow US on facebook and twitter at:

National Weather Service Glossary of Abbreviations