Area Forecast Discussion
Issued by NWS Eureka, CA

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FXUS66 KEKA 231234

National Weather Service Eureka CA
534 AM PDT Tue May 23 2017

.SYNOPSIS...Hot and dry inland weather will continue Tuesday
then gradually fall back to normal values late in the work week.
Coastal areas will remain more seasonal with morning clouds and
afternoon sunshine. Pop up showers will be possible over the
mountainous interior the next few afternoons with a slight chance
for thunderstorms on Wednesday.


.DISCUSSION...Expect another dry and hot day for inland areas
today as the upper ridge axis begins to propagate eastward.
Temperatures should be similar to yesterday just but just a few
degrees cooler. Coastal areas should be nice again once any
lingering clouds or patchy fog diminishes with more seasonal
temperatures expected for today. Looking into the second half of
the week, 500mb heights will fall as an upper low from the
northwest breaks down the ridge of high pressure. This will allow
temperatures to gradually fall to near normal values for this time
of year by the end of the work week. Models are still signaling
decent instability for the next few afternoons, however, layer
Total Total values are too low to support lightning. Thus pop up
showers continue to be a possibility over the next several
afternoons across the mountainous interior. There remains a slight
chance for thunderstorms on Wednesday afternoon as a weak closed
low undercuts the upper ridge and becomes absorbed into the upper
level flow. High pressure will build over the weekend as the upper
trough tracks over the central United States. This will cause
inland temperatures to increase once again over the weekend. kml


.AVIATION...Coastal clouds cleared out during the afternoon and
evening along much of the Redwood Coast on Sunday other than a thin
strip near and just offshore. A more substantial cloud bank lingered
of the Mendocino Coast. This cloudiness has been slow to re-develop
overnight near KACV and KCEC, but low clouds and fog have begun to
be more prevalent during the past few hours. In fact, visibilities
here at the office have dropped to 1/16 of a mile during the last
hour. Expect improvement in conditions during the mid to late
morning, but uncertainty regarding timing is high. Although winds
will be generally light, winds just offshore will be increasing
later today and tonight. KUKI is expected to remain VFR, although
low clouds will edge closer to the airport from the S early this
morning. /SEC


.MARINE...N winds will begin to ramp up today and tonight as the
gradient between high pressure over the E Pacific and and inverted
inland trough tightens. Strong gales will develop over the N outer
waters by Wednesday. Occasional gusts to storm force are possible in
this area as well. Have upgraded the Gale Watch to a warning there.
Across the S outer waters, sustained winds will reach gale force in
the NW corner of the zone, but frequent gale force gusts should
eventually develop elsewhere in the zone. As a result, have also
hoisted a Gale Warning for that area. Have made some adjustments to
the timing of the N near shore Small Craft Advisory. Finally, the
latest model data indicates that the pressure pattern and associated
gradient may spare the S near shore waters headline criteria winds
or seas. There is uncertainty as to whether the short period N wind
waves generated will be able to affect enough of this zone to
warrant an advisory for seas at some point, but, for now, have
lowered the previous Small Craft Advisory for that zone. Winds will
begin to decrease late Wednesday night and Thursday with lighter
winds returning for the weekend. /SEC


PM this evening to 6 PM PDT Thursday for PZZ450.

     Small Craft Advisory until 9 PM PDT this evening for PZZ470.

     Gale Warning from 9 PM this evening to 6 PM PDT Thursday for

     Small Craft Advisory from 3 PM this afternoon to 3 AM PDT
     Wednesday for PZZ475.

     Gale Warning from 3 AM Wednesday to noon PDT Thursday for PZZ475.



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