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 29 30
FXUS66 KEKA 201119

National Weather Service Eureka CA
419 AM PDT Tue Aug 20 2019

.SYNOPSIS...Seasonable temperatures will persist through mid
week. In addition, there is a chance for light rain on Wednesday
over Del Norte County. Thereafter warmer temperatures are
expected across the interior during late week.


.DISCUSSION...Weak troughing will aid in maintaining seasonable
temperatures and generally pleasant conditions across NW
California through mid week. Coastal stratus has become widespread
across the coast Tuesday morning. Patchy fog and drizzle may
accompany the stratus along the Humboldt/Del Norte coasts through
mid day, with localized clearing possible during the afternoon.

Model guidance continues to show an upper trough moving inland
over the Pacific Northwest during Wednesday, and that feature is
forecast to drive a weak cold front towards the northern portion
of the area. The front will be accompanied by an unseasonably
moist air mass characterized by precipitable water values
approaching two inches, lending increased confidence in light rain
potential across the far north Wednesday afternoon/evening.

The trough will quickly depart Wednesday night, leaving the area
beneath quasi-zonal flow during the end of the week. Expect
interior temperatures to gradually trend upward during this time
as heights slowly rise and 850 mb temps increase from the mid to
upper teens into the low 20s C. No additional precipitation is
expected from Thursday into early next week.



.AVIATION...A deepening marine layer has contributed widespread
stratus and fog along the coast this morning with ifr conditions
observed at KCEC and KACV. The ifr conditions should improve to
mvfr by late morning with a brief period of vfr conditions in the
afternoon. Inland airfields will continue to see predominantly VFR
conditions through the period.


.MARINE...A mix of north and south winds is being observed off
the coast this morning but speeds remain light. This pattern will
continue with mainly light and variable winds and relatively calm
seas across the waters today. A more widespread direction change
will occur on Wednesday ahead of an approaching front, with a
period of moderate to fresh breezes possible across the far
northern portions of the area. Northerlies will quickly return in
the wake of the front, with the next round of Small Craft
Advisories likely needed by Thursday morning as short period seas
begin to ramp up again. The northerly wind regime and elevated
seas then look to persist at least through the weekend.
Additionally, a pair of small mid-period swells will continue to
move through the waters from the northwest for the next few days.




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.