Area Forecast Discussion
Issued by NWS Eureka, CA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
FXUS66 KEKA 262207

National Weather Service Eureka CA
307 PM PDT Wed Apr 26 2017

.SYNOPSIS...Building high pressure will cut off access moist
northwest flow which should bring an end to rainfall tonight.
Expect drier weather and warming temperatures over the next
several days. However...A weak passing front could bring a slight
chance for rain on Sunday. Otherwise expect mostly dry conditions
into next week.


.DISCUSSION...Moist northwest flow has brought a wetting and
persistent rain to the redwood coast through most of the day with
totals ranging from 0.10 inches over Cape Mendocino to more than 1
inch across Del Norte County and just a few hundredths reported
elsewhere. The back edge of the front is visible on satellite
imagery which should allow rain to diminish by this evening,
however, a weak wave in the upper level flow could prolong nuisance
rainfall tonight into early Thursday morning. Low, yet unmentionable
pops were added for this time frame. Confidence is higher in dry
conditions developing by Thursday afternoon/evening as ridging cuts
off the moisture. The overall trend this weekend into early next
week is for warmer temperatures, mostly dry weather, and even sunny
skies across northwest California. Although, looking at PWATs
through the next several days, the GFS shows very moist flow
impacting northwest California Sunday morning as weak wave slides
overtop the ridge. A slight chance for showers was added for Sunday
but the GFS and ECMWF keep precipitation mainly northward of the
California/Oregon border. PWATS will be quite high along the coast
next week but strong ridging should keep conditions dry. Rather,
this may signal for a more traditional summer time pattern with
fresh north winds across the coastal waters and stratus along the
coast with midday clearing. /kml


.AVIATION...A cold front brought IFR/LIFR conditions to The
Redwood Coast. Low cigs/vis really impacted coastal airports
into the afternoon... especially CEC & ACV sites as the front sort
of slowed down (or became semi-stationary). Gradual improving
conditions through the first half of the period as a lot of
clouds/moisture will continue lingering across the region. This
will result in widespread MVFR conditions into the evening.

Inland areas had better conditions although MVFR skies prevailed
with nominal rain amounts into early afternoon...mainly areas south
of Cape Mendocino. The tail end of the forecast period will render
widespread drying and a little warmer Temperatures.


.MARINE...Little to no changes were made to the previous forecast
package. Forecast is still on track. Utilized GFS in refreshing
the wind forecasts. Winds have shifted from south to northwest
today, and the northerly winds will intensify this evening. Wind
gusts should be around 25 to 30 kt for the southern waters. By
Thursday evening, northerly winds of 10 to 20 kt with gusts to 30
kt will be commonplace across all of the waters. The northerly
winds will persist through the weekend into next week as the East
Pacific High establishes itself over the area.

We will have a mid-period westerly swell through the forecast
period, and also a long-period southerly swell in the background.
The northerly wind wave will become significant on Thursday and
continue through the end of the forecast period. We will have seas
of 7 to 8 feet with wave period of 7 to 8 seconds, which is fairly


NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory from 6 PM Thursday to 3 AM PDT Saturday for

     Small Craft Advisory from 9 PM this evening to 3 AM PDT Saturday
     for PZZ455-475.



Visit us at

Follow us on Facebook and Twitter at:

For forecast zone information
see the forecast zone map online: is the U.S. government's official web portal to all federal, state and local government web resources and services.