Marine Weather Net

Cape Mendocino to Point Arena CA from 10 NM to 60 NM Marine Forecast


TODAY

N
WINDS
20 - 30
KNOTS

TONIGHT

N
WINDS
20 - 30
KNOTS

TUE

N
WINDS
15 - 20
KNOTS

TUE NIGHT

N
WINDS
5 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ475 Forecast Issued: 453 AM PST Mon Jan 18 2021

GALE WARNING IN EFFECT THROUGH THIS EVENING
Today...N Winds 20 To 30 Kt With Gusts To Around 40 Kt. Waves N 16 Ft At 11 Seconds...And W 13 Ft At 18 Seconds.
Tonight...N Winds 20 To 30 Kt. Waves N 15 Ft At 11 Seconds... And W 9 Ft At 16 Seconds.
Tue...N Winds 15 To 20 Kt. Waves N 9 Ft At 8 Seconds...And W 6 Ft At 15 Seconds.
Tue Night...N Winds 5 To 15 Kt. Waves N 7 Ft At 7 Seconds... And W 5 Ft At 14 Seconds.
Wed...N Winds 10 To 20 Kt. Waves N 7 Ft At 8 Seconds...And W 7 Ft At 16 Seconds.
Thu...Nw Winds 15 To 20 Kt. Waves N 8 Ft At 8 Seconds...And Nw 6 Ft At 13 Seconds.
Fri...N Winds 25 Kt. Waves N 12 Ft At 10 Seconds...And Nw 8 Ft At 15 Seconds.
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Area Forecast Discussion
National Weather Service Eureka CA
300am PST Monday Jan 18 2021

Synopsis
Dry weather will prevail through at least Wednesday. Offshore flow through Tuesday will result in warm days and cool nigheights in the valleys, with locally strong winds over exposed mountainous terrain. Temperatures will trend progressively cooler through the end of the week, along with increasing chances for some light precipitation.

An amplification of the upper level pattern is underway this morning as a potent shortwave trough drops southward along the central California coast and a strong ridge builds over the eastern Pacific. This has ushered in dry offshore flow across northwest CA as surface high pressure builds over the Great Basin, with gusts to around 45 mph being observed at some of the higher elevations in Lake County as of early this morning. Expect sunny, warm, and breezy conditions to prevail across the area today, with a secondary, stronger peak in winds on area ridges tonight into Tuesday morning as another shortwave drops southward through the Great Basin into southern CA. A Wind Advisory remains in effect through Tuesday evening at higher elevations across Mendocino and Lake Counties. Winds will subside as the ridge axis moves back overhead Tuesday night into Wednesday, supporting relatively benign conditions during the middle of the week. A cold upper trough still looks to move over the region towards the end of the week, bringing cooler temperatures and perhaps some light precipitation Thursday into Friday. After a brief return of upper level ridging during the weekend, models are then hinting at large scale troughing over the western CONUS early next week, bringing the prospect of lower snow levels and increased chances for more significant precipitation back to NW CA for the last week of January. /CB

Marine
A passing upper-level disturbance aided in the development of gusty north winds over the northern inner waters early Monday morning. A gale warning was subsequently issued for gusts up to 40 kt. Those winds are expected to diminish by mid Monday morning, but hazardous seas will persist across all inner waters through early afternoon. Otherwise, northerly gale force winds over the outer waters will dissipate this evening. A period of relatively weak winds will occur Tuesday and Wednesday, followed by the redevelopment of near-gale-force-winds during Friday.

Garner

Fire Weather
Forecast offshore wind event remains on track, with a few advisory level gusts being observed at higher elevations across Lake and southern Mendocino County as of early Monday morning. Expect a secondary peak in winds tonight into Tuesday morning, with winds gusting in excess of 50 mph at times across these areas. RH recoveries have been even poorer than anticipated overnight, with many ridgetop locations remaining in the mid 20s. Have lowered RH values accordingly, with afternoon minimums in the low to mid teens and possibly even single digits at some locations today. Fuel moisture remains the limiting factor for more widespread fire weather concerns, but will continue to carry headlines for localized critical conditions in the Lake and interior Mendocino fire weather zones. /CB

.BEACH HAZARDS...A long period swell will impact west facing beaches today. That swell will aid in a slight risk for hazardous surf through this afternoon.

Garner

.EKA WATCHES/WARNINGS/ADVISORIES... CA...Wind Advisory until 10pm PST Tuesday for CAZ110-111-113>115.

NORTHWEST CALIFORNIA COASTAL WATERS...Gale Warning until 7am PST this morning for PZZ450.

Hazardous Seas Warning from 7am this morning to 1pm PST this afternoon for PZZ450.

Gale Warning until 10pm PST this evening for PZZ470-475.

Hazardous Seas Warning until 1pm PST this afternoon for PZZ455.

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