Hurricane Warnings in Effect

Atlantic:  High Seas

High Frequency Voice Broadcast (California)

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FZPN36 KWBC 211533
OFFN36

Marine Weather HF Voice Broadcast
NWS Ocean Prediction Center Washington DC
833 AM PDT Thu Sep 21 2023

California waters-
Inner waters from  60 nm to 150 nm offshore.
Outer waters from 150 nm to 250 nm offshore.

Conditions given represent the highest within that period.

Seas given as significant wave height, which is the average
height of the highest 1/3 of the waves. Individual waves may be
more than twice the significant wave height.

.SYNOPSIS FOR CALIFORNIA WATERS...A coastal trough will slowly
weaken today through early Fri over the N and central areas as
high pressure weakens W and NW of the area. A cold front will
move SE across the N waters Fri into Sat while weakening, then
become stationary later Sat before lifting N Sat night as a warm
front. A strong low will develop NW of the area Sun with a
associated cold front reaching the N waters late Sun into Sun
night, then moving SE over the central waters Mon and the S
waters Mon night. High pressure will build across the waters from
the W later Mon and Mon night.  

Point St. George to Point Arena

.TODAY...N winds 20 to 30 kt. Seas 8 to 14 ft. 
.TONIGHT...N winds 15 to 25 kt. Seas 6 to 11 ft. 
.FRI...N winds 10 to 20 kt. Seas 4 to 8 ft. 
.FRI NIGHT...N to NW winds 10 to 20 kt. Seas 4 to 6 ft. 
.SAT...NW winds 5 to 15 kt. Seas 4 to 6 ft. 
.SAT NIGHT...S winds 15 to 25 kt. Seas 4 to 7 ft. 
.SUN...S winds 20 to 30 kt. Seas 7 to 12 ft. 
.SUN NIGHT...S to SW winds 20 to 30 kt. Seas 9 to 15 ft. 
.MON...W to SW winds 15 to 25 kt. Seas 9 to 16 ft. 
.MON NIGHT...W winds 15 to 25 kt. Seas 13 to 21 ft. 

Point Arena to Santa Cruz Island, CA

.TODAY...N winds 20 to 30 kt. Seas 9 to 15 ft. 
.TONIGHT...N winds 15 to 25 kt. Seas 7 to 12 ft. 
.FRI...N to NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.FRI NIGHT...N to NW winds 5 to 15 kt. Seas 5 to 7 ft. 
.SAT...N to NW winds 5 to 15 kt. Seas 4 to 6 ft. 
.SAT NIGHT...SW winds 10 to 20 kt. Seas 4 to 6 ft. 
.SUN...S to SW winds 15 to 25 kt. Seas 6 to 10 ft. 
.SUN NIGHT...S to SW winds 15 to 25 kt. Seas 7 to 11 ft. 
.MON...SW winds 10 to 20 kt. Seas 8 to 13 ft. 
.MON NIGHT...W winds 5 to 15 kt. Seas 9 to 14 ft. 

Santa Cruz Island, CA to San Clemente Island, CA...south to
Guadalupe Island

.TODAY...N to NW winds 5 to 15 kt. Seas 7 to 11 ft. 
.TONIGHT...N to NW winds 5 to 15 kt. Seas 7 to 11 ft. 
.FRI...N to NW winds less than 10 kt. Seas 5 to 9 ft. 
.FRI NIGHT...N to NW winds 5 to 15 kt. Seas 4 to 7 ft. 
.SAT...N to NW winds 5 to 15 kt. Seas 3 to 6 ft. 
.SAT NIGHT...N to NW winds 5 to 15 kt. Seas 3 to 6 ft. 
.SUN...NW winds 5 to 15 kt. Seas 3 to 6 ft. 
.SUN NIGHT...NW winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON...NW winds 10 to 20 kt. Seas 4 to 6 ft. 
.MON NIGHT...NW winds 10 to 20 kt. Seas 4 to 7 ft. 

.Forecaster Shaw. Ocean Prediction Center.