Marine Weather Net

Point St. George to Point Arena between 60 and 150 NM Offshore Forecast


TONIGHT

WSW
WINDS
5 - 10
KNOTS

THU

WNW
WINDS
5 - 15
KNOTS

THU NIGHT

N
WINDS < 10
KNOTS

FRI

NNE
WINDS
5 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ820 Forecast Issued: 127 PM PST Wed Dec 02 2020

Tonight...W To Sw Winds 5 To 10 Kt, Becoming Variable, Then, Becoming S. Seas 8 To 14 Ft.
Thu...W To Nw Winds 5 To 15 Kt, Becoming N To Nw. Seas 11 To 15 Ft.
Thu Night...N Winds Less Than 10 Kt. Seas 11 To 13 Ft.
Fri...N To Ne Winds 5 To 15 Kt, Becoming Variable. Seas 10 To 12 Ft.
Fri Night...W To Nw Winds Less Than 10 Kt, Becoming S. Seas 7 To 10 Ft.
Sat...S To Sw Winds 15 To 25 Kt. Seas 6 To 10 Ft.
Sat Night...W To Nw Winds 10 To 20 Kt, Becoming Nw 5 To 15 Kt. Seas 9 To 15 Ft.
Sun...N To Nw Winds 10 To 20 Kt. Seas 10 To 13 Ft.
Sun Night...N Winds 15 To 25 Kt. Seas 9 To 11 Ft.
Mon...N Winds 10 To 20 Kt. Seas 9 To 13 Ft, Building To 11 To 19 Ft.
Mon Night...N To Nw Winds 5 To 15 Kt. Seas 15 To 20 Ft.
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Area Forecast Discussion
National Weather Service Eureka CA
303pm PST Wednesday Dec 2 2020

Synopsis
A strong ridge of high pressure anchored across the West Coast will persist into next week, with overall dry and mild weather. While there will be occasional bouts of cloudy skies and morning fog, particularly along the coast, expect a fair amount of sunshine through the end of the week.

High pressure aloft and resulting subsidence has made its presence known across northwest California with plenty of dry air and less valley fog, along with clearer skies overall allowing for cooler temperatures in the valleys and at the coast. Patchy stratus has formed just offshore though, and the low level flow will begin to turn onshore later this afternoon thus an increase in cloud cover for the coast is expected tonight. The current ridge of high pressure will only briefly open the door for a couple of very weak fronts to approach northwest California, one on Thursday morning and another late on Saturday. The latest high resolution model guidance suggests the former might have an outside chance at sending a few showers or at least sprinkles toward Del Norte and Humboldt early Thursday, but forecast soundings generally otherwise indicate quite a bit of low-level dry air to overcome. Will continue with slight chances of rain during these periods...but at a minimum some increase in cloud cover could be associated with these fronts. Some patchy valley fog or even a little coastal stratus may try to develop Thursday night thanks to an increase in low- level moisture, but otherwise Friday should turn out mostly sunny and unseasonably mild. Both operational and ensemble model data suggest that this weekend's trough will be deeper, with a better chance at some light rain making it onshore, mainly north of Cape Mendocino. Otherwise, no significant rain will threaten our area through at least Tuesday of next week, and probably not until the following weekend. Both GEFS and EC ENS point toward a potential pattern change toward cooler and wetter weather around the 10th-12th. Despite a good signal, would hold off on placing your bets just yet, though.

Marine
Light to gentle southerlies have developed ahead of a weak shortwave this afternoon. Northerlies will quickly redevelop behind this system tomorrow afternoon. Another round of southerlies will then develop on Saturday ahead of another approaching weak system, with some moderate to fresh southerlies expected over portions of the northern waters. Northerlies will redevelop over all zones by Sunday morning. Moderate to fresh northerly breezes are expected over the southern outer waters late on Sunday and into Monday. A very long-period west to northwest swell is moving through the waters today and will peak around 13 to 14 feet at 19 seconds late tomorrow morning and into the early afternoon hours. Larger breaking waves will be possible over bars/shoals through tomorrow morning, which may catch mariners off guard. A Marine Weather Statement is in effect to capture this threat. In addition, some higher surf is expected tomorrow, with breakers possibly topping out around 20 feet or so. This swell will continue to dominate the waters on Friday, but will gradually weaken this weekend. Otherwise, another large swell is forecast to move through the waters early next week.

.BEACH HAZARDS...A long-period west to northwest swell will continue to move through the waters tonight, bringing with it an enhanced threat for sneaker waves on the beaches of Northwest California. Lingering energy from a previous swell may limit the overall threat, but beachgoers should remain cognizant and never turn their backs on the ocean! In addition, once the swell builds into tomorrow, breakers will be around 20 feet or so. This is below advisory criteria, but it is somewhat elevated. We'll continue to monitor the situation in case the breakers come in a little higher than predicted, thus warranting an advisory.

.EKA WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement through Thursday morning for CAZ101-103- 104-109.

NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory from midnight tonight to 9pm PST Friday for PZZ450-455-470-475.