Today, the OPC website will be unavailable beginning at 0700 EDT/1100 UTC for approximately 30 min. Please refresh your browser or navigate to https://ocean.weather.gov after the maintenance window to see the upgraded version of OPC's website.
This is a non-operational test website. For official OPC information and forecasts, please refer to the operational OPC website: https://ocean.weather.gov.

Pacific Text Briefing Package

[Printable Version]

AGPN40 KWNM 171358
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
558 AM PST Sun Dec 17 2017

.FORECAST DISCUSSION...Major features/winds/seas/significant 
.weather for the North Pacific N of 30N and E of 150W.

Latest model guidance shows gradient relaxing enough to allow for
gales to diminish across the California waters, and do not see 
any surface observations to indicate gale conditions out there at
this time. Unless receive any last minute data before issuance
time to show gales, will allow for gales in the California waters
to expire in the next package. 

Otherwise, no significant changes to the forecast anticipated at
this time.

SEAS...Did see a ship report of 19 ft just W of the southern
California offshore waters at 12z. Increased seas by a foot or
two in the wave grids around that location to account for the
higher observation. Otherwise, current wave grids within a foot
or two of latest surface observations.

-----------------------------------------------------------------
PREVIOUS DISCUSSION...

Strong high pressure west of the northern pz6 waters continues 
to combine with a low pressure trof along the California coast to
produce north to northwest winds up to 40 knots across portions 
of the pz6 waters. These conditions will diminish later tonight 
and Sunday as the coastal trof begins to weaken. By late Monday 
mainly light winds are expected across most of the pz6 waters. A 
cold front is still expected to move into the pz6 waters from the
northwest by late Tuesday, then move into the southern pz6 
waters by late Wednesday. Winds behind this front are still 
expected to be as high as 30 knots across the offshore waters. 
Conditions will then diminish again by Thursday. Farther north, a
warm front will move across the pz5 waters tonight, followed by 
a cold front Sunday night. Low pressure will then move across the
pz5 waters Monday night and Tuesday with gale force winds still 
expected. The latest runs of the gfs and ecmwf look to be in
reasonable agreement across the eastern Pacific through Thursday.
For wind grids will use the gfs winds throughout. Current 
warnings look reasonable and few changes should be needed on the 
next offshore waters forecast.

For wave height grids will also use the ww3 throughout the
forecast period.

Extratropical storm surge guidance...n/a.



.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
.PZZ800...Inner Waters from Cape Flattery to Cape Shoalwater...
     Gale Possible Tuesday into Wednesday. 
.PZZ900...Outer Waters from Cape Flattery to Cape Shoalwater...
     Gale Possible Tuesday night into Wednesday. 
.PZZ805...Inner Waters from Cape Shoalwater to Cape Lookout...
     Gale Possible Tuesday into Wednesday. 
.PZZ905...Outer Waters from Cape Shoalwater to Cape Lookout...
     Gale Tuesday.
     Gale Possible Tuesday night into Wednesday. 
.PZZ810...Inner Waters from Cape Lookout to Florence OR...
     Gale Possible Tuesday.
.PZZ910...Outer Waters from Cape Lookout to Florence OR...
     Gale Tuesday.
     Gale Possible Tuesday.
.PZZ815...Inner Waters from Florence OR to Point St. George...
     Gale Possible Tuesday.
.PZZ915...Outer Waters from Florence OR to Point St. George...
     Gale Possible Tuesday.

.PZ6 California Waters...
     None.

$$

.Forecaster Achorn/Nolt. Ocean Prediction Center.
Last Update:13:59Z, 17 December 2017
Updates: Four times per day

FZPN25 KWBC 171547
OFFPZ5

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
747 AM PST Sun Dec 17 2017

Washington and Oregon waters-
Inner waters from  60 nm to 150 nm offshore.
Outer waters from 150 nm to 250 nm offshore.

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.

PZZ898-180430-
747 AM PST Sun Dec 17 2017

.SYNOPSIS FOR WASHINGTON AND OREGON WATERS...A cold front will
move into the waters today and tonight, before becoming
stationary over the area Mon. Low pressure will form along the
front W of the area late Mon and move over the area Mon night
into Tue while intensifying. The low will push a strong cold
front across the waters Tue. Another low will move SE along the
coast Tue night into Wed. Strong high pres will build in from 
the W and NW Wed and slowly weaken while moving into the W 
waters Wed night through Thu night.

$$

PZZ800-180430-
Cape Flattery to Cape Shoalwater between 60 nm and 150 nm
offshore-
747 AM PST Sun Dec 17 2017

...GALE FORCE WINDS POSSIBLE TUE...

.TODAY...W winds 10 to 20 kt. Seas 10 to 11 ft. Chance of rain. 
.TONIGHT...W to NW winds 10 to 20 kt. Seas 8 to 10 ft. Chance of
rain. 
.MON...NW winds 10 to 20 kt, becoming variable less than 10 kt.
Seas 8 to 9 ft. 
.MON NIGHT...E winds increasing to 15 to 25 kt, then becoming SW
20 to 30 kt. Seas 8 to 12 ft. Rain.
.TUE...SW winds 25 to 35 kt, becoming NW 20 to 30 kt. Seas 10 to
15 ft. 
.TUE NIGHT...NW winds 25 to 35 kt. Seas 12 to 18 ft. 
.WED...N to NW winds 25 to 35 kt, becoming N 15 to 25 kt. Seas
12 to 19 ft. 
.WED NIGHT...N winds 15 to 25 kt, diminishing to 10 to 20 kt. 
Seas 8 to 14 ft.
.THU...E to NE winds less than 10 kt, becoming E to SE. Seas
7 to 9 ft. 
.THU NIGHT...E to SE winds 5 to 10 kt. Seas 7 to 9 ft. 

$$

PZZ900-180430-
Cape Flattery to Cape Shoalwater between 150 nm and 250 nm
offshore-
747 AM PST Sun Dec 17 2017

...GALE FORCE WINDS POSSIBLE TUE NIGHT...

.TODAY...W winds 5 to 15 kt, becoming W to SW 10 to 20 kt. Seas
9 to 12 ft. Chance of rain. 
.TONIGHT...W to NW winds 10 to 20 kt. Seas 8 to 10 ft. Chance of
rain. 
.MON...NW winds 5 to 15 kt, becoming variable. Seas 8 to 11 ft. 
.MON NIGHT...E to NE winds increasing to 15 to 25 kt, then becoming
SW 20 to 30 kt. Seas 9 to 12 ft. Rain.
.TUE...N winds 20 to 30 kt, becoming NW. Seas 10 to 13 ft. 
.TUE NIGHT...NW winds 25 to 35 kt. Seas 11 to 19 ft. 
.WED...N to NW winds 30 to 35 kt, becoming N 20 to 30 kt. Seas
13 to 19 ft. 
.WED NIGHT...N winds 15 to 25 kt. Seas 9 to 14 ft. 
.THU...N winds 10 to 20 kt, becoming NE less than 10 kt. Seas
8 to 10 ft. 
.THU NIGHT...E to NE winds less than 10 kt, becoming variable.
Seas 7 to 9 ft. 

$$

PZZ805-180430-
Cape Shoalwater to Cape Lookout between 60 nm and 150 nm
offshore-
747 AM PST Sun Dec 17 2017

...GALE FORCE WINDS POSSIBLE TUE...

.TODAY and TONIGHT...W to SW winds 10 to 20 kt. Seas 8 to 11 ft.
Chance of rain. 
.MON...W to NW winds 5 to 15 kt, becoming variable. Seas 8 to
9 ft. 
.MON NIGHT...SW winds increasing to 20 to 30 kt. Seas 8 to 13 
ft. Chance of rain. 
.TUE...SW winds 25 to 35 kt, becoming W to SW 20 to 30 kt. Seas
11 to 16 ft. 
.TUE NIGHT...NW winds 20 to 30 kt, increasing to 25 to 35 kt.
Seas 11 to 18 ft. 
.WED...NW winds 25 to 35 kt, becoming N to NW 15 to 25 kt. Seas
14 to 19 ft. 
.WED NIGHT...N winds 10 to 20 kt, becoming N to NW 5 to 15 kt.
Seas 9 to 15 ft. 
.THU...Variable winds less than 10 kt. Seas 8 to 10 ft. 
.THU NIGHT...Variable winds less than 10 kt, becoming S to SE.
Seas 7 to 9 ft. 

$$

PZZ905-180430-
Cape Shoalwater to Cape Lookout between 150 nm and 250 nm
offshore-
747 AM PST Sun Dec 17 2017

...GALE WARNING...

.TODAY...W winds 10 to 15 kt, becoming W to SW 10 to 20 kt. Seas
9 to 11 ft. Chance of rain. 
.TONIGHT...W winds 10 to 20 kt. Seas 8 to 10 ft. Chance of rain.
.MON...W to NW winds 5 to 15 kt, becoming S to SW 15 to 25 kt.
Seas 8 to 10 ft. 
.MON NIGHT...SW winds 20 to 30 kt. Seas 8 to 13 ft. Chance of
rain. 
.TUE...SW winds 25 to 35 kt, becoming NW 20 to 30 kt. Seas 11 to
15 ft. 
.TUE NIGHT...NW winds 20 to 30 kt, increasing to 25 to 35 kt.
Seas 11 to 18 ft. 
.WED...NW winds 25 to 35 kt, becoming N 20 to 25 kt. Seas 14 to
19 ft. 
.WED NIGHT...N winds 10 to 20 kt. Seas 10 to 15 ft. 
.THU...N winds 5 to 15 kt, diminishing to less than 10 kt. Seas
8 to 10 ft. 
.THU NIGHT...N to NW winds less than 10 kt, becoming variable.
Seas 7 to 9 ft. 

$$

PZZ810-180430-
Cape Lookout to Florence, OR between 60 nm and 150 nm offshore-
747 AM PST Sun Dec 17 2017

...GALE FORCE WINDS POSSIBLE TUE...

.TODAY and TONIGHT...W winds 5 to 15 kt. Seas 6 to 9 ft.
.MON...W to SW winds 5 to 15 kt. Seas 7 to 8 ft. 
.MON NIGHT...SW winds 15 to 25 kt. Seas 7 to 11 ft. 
.TUE...S to SW winds increasing to 30 to 40 kt. Seas building to 11
to 16 ft.
.TUE NIGHT and WED...NW winds 20 to 30 kt. Seas 12 to 18 ft. 
.WED NIGHT...N winds 10 to 20 kt, becoming N to NW 5 to 10 kt.
Seas 10 to 15 ft. 
.THU...NW winds 5 to 10 kt, becoming variable. Seas 8 to 10 ft. 
.THU NIGHT...Variable winds less than 10 kt. Seas 7 to 9 ft. 

$$

PZZ910-180430-
Cape Lookout to Florence, OR between 150 nm and 250 nm offshore-
747 AM PST Sun Dec 17 2017

...GALE WARNING...

.TODAY...W winds 5 to 15 kt. Seas 8 to 10 ft. 
.TONIGHT...W winds 10 to 15 kt. Seas 8 to 9 ft. 
.MON...W winds 5 to 15 kt, becoming SW 10 to 20 kt. Seas 7 to
9 ft. 
.MON NIGHT...SW winds increasing to 20 to 30 kt. Seas 8 to 13 
ft.
.TUE...SW winds 25 to 35 kt, becoming NW 20 to 25 kt. Seas 12 to
15 ft. 
.TUE NIGHT...NW winds 20 to 30 kt. Seas 12 to 13 ft. 
.WED...N to NW winds 20 to 30 kt. Seas 13 to 17 ft. 
.WED NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt.
Seas 10 to 15 ft. 
.THU...N winds less than 10 kt. Seas 8 to 10 ft. 
.THU NIGHT...N to NW winds less than 10 kt. Seas 7 to 9 ft. 

$$

PZZ815-180430-
Florence, OR to Point St. George between 60 nm and 150 nm
offshore-
747 AM PST Sun Dec 17 2017

...GALE FORCE WINDS POSSIBLE TUE...

.TODAY...N to NW winds 5 to 15 kt. Seas 5 to 8 ft. 
.TONIGHT...N to NW winds 10 to 20 kt, becoming W to NW 5 to
15 kt. Seas 7 to 8 ft. 
.MON...W to SW winds 5 to 15 kt. Seas 6 to 8 ft. 
.MON NIGHT...SW winds increasing to 15 to 25 kt. Seas 7 to 11 
ft.
.TUE...SW winds 20 to 30 kt, becoming S to SW 30 to 40 kt. Seas
9 to 15 ft. 
.TUE NIGHT...NW winds 15 to 25 kt. Seas 11 to 14 ft. 
.WED...NW winds 20 to 30 kt. Seas 11 to 16 ft.
.WED NIGHT...N winds 15 to 20 kt, diminishing to 5 to 15 kt.
Seas 11 to 15 ft. 
.THU...N winds 5 to 15 kt. Seas 8 to 11 ft. 
.THU NIGHT...N winds 5 to 15 kt. Seas 7 to 9 ft. 

$$

PZZ915-180430-
Florence, OR to Point St. George between 150 nm and 250 nm
offshore-
747 AM PST Sun Dec 17 2017

...GALE FORCE WINDS POSSIBLE TUE...

.TODAY...W to NW winds 5 to 15 kt. Seas 5 to 9 ft. 
.TONIGHT...W winds 5 to 15 kt. Seas 6 to 8 ft. 
.MON...W winds 5 to 15 kt, becoming SW. Seas 6 to 9 ft. 
.MON NIGHT...SW winds 10 to 20 kt, increasing to 20 to 30 kt.
Seas 7 to 12 ft. 
.TUE...SW winds 25 to 35 kt. Seas 10 to 14 ft. 
.TUE NIGHT...NW winds 20 to 25 kt. Seas 11 to 13 ft. 
.WED...N to NW winds 15 to 25 kt. Seas 11 to 15 ft. 
.WED NIGHT...N winds 15 to 20 kt, diminishing to 5 to 15 kt.
Seas 10 to 14 ft. 
.THU...N winds less than 10 kt. Seas 8 to 10 ft. 
.THU NIGHT...N winds less than 10 kt, becoming variable. Seas
7 to 9 ft. 

$$

.Forecaster Achorn. Ocean Prediction Center.
Last Update:15:48Z, 17 December 2017
Updates: Four times per day

FZPN26 KWBC 171549
OFFPZ6

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
749 AM PST Sun Dec 17 2017

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

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.

PZZ899-180430-
749 AM PST Sun Dec 17 2017

.SYNOPSIS FOR CALIFORNIA WATERS...A low pressure trough along the
coast will weaken today into tonight and dissipate on Mon. High
pressure to the W and NW of the waters will persist through Mon
night while slowly weakening. The high will then shift into the
southern waters by Tue and dissipate by Tue night. A strong cold
front will move across the northern and central waters Tue
through Wed, then dissipate as it moves into the southern waters
Wed night. A coastal trough will redevelop Wed night as strong
high pressure builds in from the W and NW. Both the trough and
high will weaken Thu and Thu night.

$$

PZZ820-180430-
Point St. George to Point Arena between 60 nm and 150 nm
offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 20 to 30 kt. Seas 7 to 12 ft, except NW portion
5 to 8 ft.
.TONIGHT...N winds 15 to 25 kt. Seas 6 to 10 ft. 
.MON...N winds 10 to 20 kt. Seas 6 to 8 ft. 
.MON NIGHT...Variable winds 5 to 15 kt, becoming SW 10 to 20 kt.
Seas 6 to 9 ft. 
.TUE...SW winds 10 to 20 kt, increasing to 20 to 30 kt. Seas
7 to 13 ft. 
.TUE NIGHT...S to SW winds 20 to 30 kt, becoming N to NW 15 to
25 kt. Seas 8 to 13 ft. 
.WED...N to NW winds 15 to 20 kt. Seas 10 to 11 ft. 
.WED NIGHT and THU...N winds 10 to 20 kt. Seas 9 to 12 ft. 
.THU NIGHT...N winds 10 to 20 kt. Seas 7 to 10 ft.

$$

PZZ920-180430-
Point St. George to Point Arena between 150 nm and 250 nm
offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 15 to 25 kt. Seas 5 to 8 ft, except SE portion to
10 ft.
.TONIGHT...N to NW winds 10 to 20 kt. Seas 5 to 8 ft. 
.MON...N to NW winds 5 to 15 kt, becoming variable. Seas 5 to
7 ft. 
.MON NIGHT...SW winds increasing to 15 to 25 kt. Seas 6 to 11 
ft.
.TUE...SW winds 20 to 30 kt. Seas 7 to 13 ft. 
.TUE NIGHT...NW winds 15 to 25 kt. Seas 8 to 13 ft. 
.WED...N winds 15 to 20 kt. Seas 9 to 11 ft. 
.WED NIGHT...N winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 8 to 12 ft. 
.THU...N winds 5 to 15 kt. Seas 8 to 10 ft. 
.THU NIGHT...N winds 5 to 15 kt, becoming N to NE. Seas 7 to
9 ft. 

$$

PZZ825-180430-
Point Arena to Pigeon Point between 60 nm and 150 nm offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 20 to 30 kt. Seas 9 to 14 ft. 
.TONIGHT...N winds 15 to 25 kt. Seas 7 to 11 ft. 
.MON...N winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas 6 to
8 ft. 
.MON NIGHT...N winds 5 to 15 kt, diminishing to less than 10 kt.
Seas 6 to 7 ft. 
.TUE...Variable winds less than 10 kt, becoming SW. Seas 6 to
8 ft. 
.TUE NIGHT...SW winds 5 to 15 kt, becoming N 10 to 20 kt. Seas
7 to 10 ft. 
.WED...N winds 10 to 20 kt. Seas 7 to 10 ft. 
.WED NIGHT and THU...N winds 15 to 25 kt. Seas 9 to 11 ft. 
.THU NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt.
Seas 8 to 10 ft. 

$$

PZZ925-180430-
Point Arena to Pigeon Point between 150 nm and 250 nm offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 20 to 30 kt. Seas 7 to 13 ft. 
.TONIGHT...N winds 10 to 20 kt. Seas 6 to 10 ft. 
.MON...N winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas 6 to
8 ft. 
.MON NIGHT...N winds less than 10 kt, becoming variable. Seas
6 to 8 ft. 
.TUE...SW winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 7 to
8 ft. 
.TUE NIGHT...SW winds 10 to 20 kt, becoming N. Seas 7 to 10 ft. 
.WED...N winds 15 to 20 kt. Seas 8 to 10 ft. 
.WED NIGHT...N to NE winds 10 to 20 kt. Seas 8 to 9 ft. 
.THU...N winds 10 to 20 kt, becoming N to NE 5 to 15 kt. Seas
8 to 10 ft. 
.THU NIGHT...N winds 5 to 15 kt. Seas 7 to 9 ft. 

$$

PZZ830-180430-
Pigeon Point to Point Piedras Blancas between 60 nm and 150 nm
offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 20 to 30 kt. Seas 9 to 15 ft. 
.TONIGHT...N winds 15 to 25 kt. Seas 7 to 11 ft. 
.MON...N winds 5 to 15 kt. Seas 5 to 8 ft. 
.MON NIGHT...N winds 5 to 15 kt, becoming variable. Seas 5 to
6 ft. 
.TUE...Variable winds less than 10 kt. Seas 6 to 7 ft. 
.TUE NIGHT...W winds 5 to 15 kt. Seas 7 to 8 ft.
.WED...N to NW winds 10 to 20 kt. Seas 7 to 10 ft. 
.WED NIGHT...N winds 20 to 25 kt. Seas 8 to 11 ft. 
.THU...N winds 15 to 25 kt. Seas 9 to 10 ft. 
.THU NIGHT...N winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 8 to 10 ft. 

$$

PZZ930-180430-
Pigeon Point to Point Piedras Blancas between 150 nm and 250 nm
offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 20 to 30 kt. Seas 9 to 16 ft. 
.TONIGHT...N winds 15 to 25 kt. Seas 7 to 11 ft. 
.MON...N winds 10 to 15 kt. Seas 6 to 8 ft. 
.MON NIGHT...N winds 5 to 15 kt, becoming N to NE. Seas 6 to
7 ft. 
.TUE...Variable winds less than 10 kt, becoming W to SW. Seas
6 to 8 ft. 
.TUE NIGHT...W winds 5 to 15 kt. Seas 7 to 8 ft.
.WED...N to NW winds 10 to 20 kt. Seas 7 to 9 ft. 
.WED NIGHT and THU...N winds 10 to 20 kt. Seas 8 to 10 ft.
.THU NIGHT...N winds 10 to 15 kt. Seas 7 to 9 ft. 

$$

PZZ835-180430-
Point Piedras Blancas to Santa Cruz Island, CA between 60 nm and
150 nm offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 20 to 30 kt. Seas 9 to 15 ft. 
.TONIGHT...N winds 10 to 20 kt. Seas 7 to 11 ft. 
.MON...N winds 5 to 15 kt, becoming variable. Seas 5 to 7 ft. 
.MON NIGHT...Variable winds less than 10 kt. Seas 5 to 6 ft. 
.TUE...Variable winds less than 10 kt, becoming SW. Seas 5 to 7 
ft. 
.TUE NIGHT...W winds less than 10 kt. Seas 6 to 8 ft. 
.WED...NW winds 5 to 15 kt, becoming N to NW 15 to 25 kt. Seas
7 to 8 ft. 
.WED NIGHT...N winds 20 to 30 kt. Seas 7 to 11 ft. 
.THU...N winds 15 to 25 kt. Seas 8 to 11 ft. 
.THU NIGHT...N winds 10 to 20 kt. Seas 7 to 9 ft.

$$

PZZ935-180430-
Point Piedras Blancas to Santa Cruz Island, CA between 150 nm
and 250 nm offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 20 to 30 kt. Seas 11 to 16 ft. 
.TONIGHT...N winds 15 to 25 kt. Seas 7 to 12 ft. 
.MON...N to NE winds 5 to 15 kt. Seas 5 to 8 ft. 
.MON NIGHT...N to NE winds less than 10 kt, becoming variable.
Seas 5 to 6 ft. 
.TUE...Variable winds less than 10 kt. Seas 5 to 7 ft. 
.TUE NIGHT...W winds less than 10 kt. Seas 6 to 8 ft. 
.WED...NW winds 10 to 15 kt, becoming N to NW 10 to 20 kt. Seas
6 to 8 ft. 
.WED NIGHT and THU...N winds 15 to 25 kt. Seas 6 to 10 ft. 
.THU NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt.
Seas 8 to 9 ft. 

$$

PZZ840-180430-
Santa Cruz Island, CA to San Clemente Island, CA between 60 nm
and 150 nm offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N to NE winds 15 to 25 kt. Seas 8 to 14 ft. 
.TONIGHT...N winds 5 to 15 kt. Seas 6 to 10 ft. 
.MON...N to NE winds less than 10 kt, becoming variable. Seas
4 to 7 ft. 
.MON NIGHT and TUE...Variable winds less than 10 kt. Seas 3 to 6
ft.
.TUE NIGHT...NW winds less than 10 kt. Seas 4 to 7 ft. 
.WED...NW winds 5 to 15 kt. Seas 4 to 7 ft. 
.WED NIGHT...NW winds increasing to 20 to 30 kt. Seas building to 7
to 11 ft.
.THU...N to NW winds 20 to 30 kt, becoming N 10 to 20 kt. Seas
7 to 12 ft. 
.THU NIGHT...N winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 5 to 9 ft. 

$$

PZZ940-180430-
Santa Cruz Island, CA to 120W between 150 nm and 250 nm offshore-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 15 to 25 kt. Seas 10 to 16 ft. 
.TONIGHT...N to NE winds 10 to 20 kt. Seas 7 to 12 ft. 
.MON...N to NE winds 5 to 15 kt, becoming E to NE. Seas 5 to
8 ft. 
.MON NIGHT...E to NE winds less than 10 kt, becoming variable. 
Seas 5 to 6 ft. 
.TUE and TUE NIGHT...Variable winds less than 10 kt. Seas 5 to 7
ft.
.WED...NW winds 5 to 15 kt. Seas 6 to 7 ft. 
.WED NIGHT...N to NW winds 15 to 25 kt. Seas 6 to 9 ft. 
.THU...N winds 15 to 25 kt. Seas 7 to 10 ft. 
.THU NIGHT...N winds 10 to 20 kt. Seas 7 to 9 ft.

$$

PZZ945-180430-
San Clemente Island, CA to Guadalupe Island from 60 nm offshore
west to 120W-
749 AM PST Sun Dec 17 2017

.TODAY...N winds 5 to 15 kt, diminishing to less than 10 kt.
Seas 8 to 14 ft. 
.TONIGHT...N winds less than 10 kt, becoming NE. Seas 6 to
11 ft. 
.MON...Variable winds less than 10 kt. Seas 4 to 8 ft. 
.MON NIGHT...N to NW winds less than 10 kt. Seas 3 to 6 ft. 
.TUE...N to NE winds less than 10 kt. Seas 3 to 5 ft. 
.TUE NIGHT...N winds 5 to 10 kt. Seas 3 to 6 ft. 
.WED...N to NW winds 10 to 15 kt. Seas 4 to 7 ft. 
.WED NIGHT...NW winds 10 to 15 kt, increasing to 15 to 25 kt.
Seas 4 to 8 ft. 
.THU...N to NW winds 15 to 25 kt. Seas 6 to 10 ft. 
.THU NIGHT...N winds 5 to 15 kt, becoming NE 10 to 20 kt. Seas
5 to 9 ft. 

$$

.Forecaster Achorn. Ocean Prediction Center.
Last Update:15:50Z, 17 December 2017
Updates: Four times per day

FZPN01 KWBC 171559
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1630 UTC SUN DEC 17 2017 

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 

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. 

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE 
NATIONAL WEATHER SERVICE. EMAIL US AT 
VOSOPS@NOAA.GOV(LOWERCASE). 

SECURITE 

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT 
TO 50N 160E 

SYNOPSIS VALID 1200 UTC DEC 17. 
24 HOUR FORECAST VALID 1200 UTC DEC 18. 
48 HOUR FORECAST VALID 1200 UTC DEC 19. 

.WARNINGS. 

...STORM WARNING...
.LOW 48N166E 984 MB MOVING N 25 KT AND RAPIDLY INTENSIFYING. 
WITHIN 300 NM NE AND SE QUADRANTS WINDS 40 TO 50 KT. SEAS 15 TO 
24 FT. ELSEWHERE OVER FORECAST WATERS W OF A LINE FROM 30N176E 
TO 50N178W TO 59N178E WINDS 25 TO 40 KT. SEAS 10 TO 20 FT.
.12 HOUR FORECAST LOW JUST NW OF FORECAST AREA 56N171E 959 MB. 
WITHIN 600 NM SE QUADRANT WINDS 45 TO 55 KT. SEAS 18 TO 34 FT.
.24 HOUR FORECAST LOW NW OF AREA 58N169E 941 MB. WITHIN 540 NM 
SW SEMICIRCLE...AND WITHIN 180 NM EITHER SIDE OF A LINE FROM 
58N172W TO 50N173W TO 39N180W WINDS 40 TO 50 KT. SEAS 18 TO 34 
FT. ALSO WITHIN 900 NM E...1200 NM SE...AND 1260 NM S QUADRANTS 
WINDS 25 TO 40 KT. SEAS 12 TO 24 FT. ELSEWHERE S OF 40N W OF 
170E WINDS TO 25 KT. SEAS 8 TO 15 FT.
.48 HOUR FORECAST LOW JUST NW OF FORECAST AREA 61N178E 957 MB. 
WITHIN 300 NM SE AND 180 NM SW QUADRANTS WINDS 40 TO 50 KT. SEAS 
25 TO 40 FT. ALSO WITHIN 480 NM NE...840 NM SE AND SW...AND 960 
NM S QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 24 FT. ELSEWHERE 
WITHIN 1200 NM S QUADRANT WINDS TO 25 KT. SEAS 10 TO 18 FT.

...GALE WARNING...
.LOW 33N119W 1009 MB MOVING SE 15 KT. OVER FORECAST WATERS FROM 
30N TO 42N BETWEEN 120W AND 131W AREA OF N WINDS 25 TO 35 KT. 
SEAS 9 TO 18 FT.
.24 HOUR FORECAST LOW DISSIPATED. E OF A LINE FROM 30N134W TO 
41N126W AND W OF 120W WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

...GALE WARNING...
.OVER FORECAST WATERS WITHIN AN AREA BOUNDED BY 42N150W TO 
30N168W TO 30N174E TO 35N179E TO 40N165W TO 42N150W WINDS 25 TO 
40 KT...HIGHEST WITHIN 180 NM SE OF A LINE FROM 31N175W TO 
36N163W. SEAS 10 TO 20 FT.
.24 HOUR FORECAST WITHIN AN AREA BOUNDED BY 30N180W TO 44N155W 
TO 43N141W TO 30N157W TO 30N180W WINDS 25 TO 40 KT...HIGHEST 
WITHIN 180 NM SE OF A LINE FROM 40N153W TO 34N161W. SEAS 10 TO 
20 FT.
.48 HOUR FORECAST NEW LOW 36N145W 1011 MB. WITHIN 900 NM 
SW...540 NM NW...AND 480 NM NE QUADRANTS WINDS 25 TO 40 KT. SEAS 
10 TO 20 FT. ELSEWHERE WITHIN 300 NM SE QUADRANT WINDS 20 TO 30 
KT. SEAS 8 TO 15 FT.

...GALE WARNING...
.LOW 57N160W 992 MB MOVING E 20 KT WITH SECOND LOW 59N152W 991 
MB MOVING E 15 KT. WITHIN 420 NM NW AND 480 NM SW QUADRANTS OF 
FIRST LOW...AND WITHIN 660 NM S QUADRANT OF SECOND LOW WINDS 25 
TO 40 KT. SEAS 11 TO 22 FT. ELSEWHERE WITHIN 540 NM NW...660 NM 
SW...AND 840 NM S QUADRANTS OF FIRST LOW...AND WITHIN 720 NM S 
AND 480 NM E QUADRANTS OF SECOND LOW WINDS 20 TO 30 KT. SEAS 8 
TO 16 FT.
.24 HOUR FORECAST FIRST LOW DISSIPATED WITH SECOND LOW 58N141W 
1005 MB. WITHIN 180 NM NW OF A LINE FROM 55N155W TO 57N148W AREA 
OF NW WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. ALSO WITHIN 840 NM SW 
QUADRANT WINDS 20 TO 30 KT. SEAS 9 TO 18 FT. ELSEWHERE WITHIN 
540 NM SE QUADRANT WINDS TO 25 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW DISSIPATED. FROM 46N TO 55N BETWEEN 134W 
AND 145W AREA OF N TO NW WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.

...GALE WARNING...
.48 HOUR FORECAST NEW LOW 47N127W 1004 MB. WITHIN 600 NM SW 
QUADRANT WINDS 25 TO 35 KT. SEAS 9 TO 16 FT. ELSEWHERE OVER 
FORECAST WATERS WITHIN 180 NM NE QUADRANT WINDS 20 TO 30 KT. 
SEAS 8 TO 14 FT.

...GALE WARNING...
.48 HOUR FORECAST WITHIN 180 NM EITHER SIDE OF A LINE FROM 
58N156W TO 51N158W TO 48N161W WINDS 25 TO 35 KT. SEAS 12 TO 22 
FT. ELSEWHERE WITHIN 180 NM EITHER SIDE OF A LINE FROM 48N161W 
TO 39N172W WINDS 20 TO 30 KT. SEAS 9 TO 18 FT.

...GALE WARNING...
.48 HOUR FORECAST...EXCEPT AS DESCRIBED WITH LOW 61N178E 
ABOVE...OVER FORECAST WATERS W OF A LINE FROM 36N160E TO 48N169E 
WINDS 25 TO 35 KT. SEAS 9 TO 16 FT.

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY OVER FORECAST WATERS N OF A 
LINE FROM 61N177W TO 62N167W. 
.24 HOUR LIGHT TO MODERATE FREEZING SPRAY N OF 63N W OF ALASKA. 
.48 HOUR FORECAST CONDITIONS IMPROVING. 

.SYNOPSIS AND FORECAST. 

.LOW 50N127W 1015 MB MOVING E 15 KT. OVER FORECAST WATERS WITHIN 
180 NM EITHER SIDE OF A LINE FROM 51N126W TO 43N145W WINDS 20 TO 
30 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW DISSIPATED. FROM 44N TO 49N E OF 130W 
WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST CONDITIONS DESCRIBED WITH LOW 47N127W IN 
WARNINGS SECTION ABOVE.

.OVER FORECAST WATERS S OF A LINE FROM 30N164W TO 40N149W WINDS 
TO 25 KT. SEAS TO 11 FT. 
.24 HOUR FORECAST WITHIN 180 NM EITHER SIDE OF A LINE FROM 
44N134W TO 37N144W TO 30N149W WINDS TO 25 KT. SEAS TO 11 FT. 
.48 HOUR FORECAST CONDITIONS DESCRIBED WITH LOW 36N145W IN 
WARNINGS SECTION ABOVE. 

.48 HOUR FORECAST WITHIN 180 NM NW OF A LINE FROM 37N176W TO 
30N168E AREA OF NE WINDS TO 25 KT. SEAS TO 12 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM OVER FORECAST 
WATERS WITHIN 180 NM EITHER SIDE OF A LINE FROM 50N168E TO 
39N162E AND WITHIN 120 NM OF 42N145W.
.24 HOUR FORECAST DENSE FOG WITHIN 90 NM EITHER SIDE OF A LINE 
FROM 51N176W TO 45N179W.
.36 HOUR FORECAST DENSE FOG N OF 57N BETWEEN 164W AND 171W.
.48 HOUR FORECAST CONDITIONS IMPROVING.

.HIGH 38N135W 1029 MB MOVING SE 05 KT.
.24 HOUR FORECAST HIGH 37N133W 1026 MB.
.48 HOUR FORECAST HIGH 35N126W 1023 MB.

.HIGH 42N175W 1037 MB MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 45N163W 1038 MB.
.48 HOUR FORECAST HIGH 46N154W 1036 MB.

.48 HOUR FORECAST HIGH 39N171E 1033 MB. 

.FORECASTER FIGURSKEY. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1200 UTC SUN DEC 17.
24 HOUR FORECAST VALID 1200 UTC MON DEC 18.
48 HOUR FORECAST VALID 1200 UTC TUE DEC 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 31N113W 1005 MB WITH COLD FRONT TO 27N114W TO 
24N117W. N OF 27N BETWEEN 121W AND 128W N WINDS 20 TO 25 KT. 
SEAS 10 TO 16 FT IN NW TO N SWELL. ELSEWHERE N OF LINE FROM 
24.5N114W TO 24N129W TO 27.5N134W WINDS 20 KT OR LESS. SEAS 8 TO 
11 FT NW TO N SWELL.
.12 HOUR FORECAST DISSIPATING COLD FRONT FROM 24N111W TO 
20N112W. N OF 22N BETWEEN 113W AND 134W WINDS 20 KT OR LESS. 
SEAS 8 TO 12 FT IN NW TO N SWELL.
.24 HOUR FORECAST COLD FRONT DISSIPATED. N OF 20W BETWEEN 112W 
AND 136W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW TO N SWELL. 
.48 HOUR FORECAST FROM 13N TO 18N BETWEEN 115W AND 130W WINDS 20 
KT OR LESS. SEAS 8 TO 9 FT IN MIXED NW TO N SWELL AND NE WIND 
WAVES.

.W OF LINE FROM 27.5N134W TO 10N111W TO 03.4S118W WINDS 20 KT OR 
LESS. SEAS 8 TO 10 FT IN NW SWELL AND NE WIND WAVES.
.24 HOUR FORECAST W OF LINE FROM 12N103W TO 03.4S115W WINDS 20 
KT OR LESS. SEAS TO 9 FT IN NW SWELL AND NE WIND WAVES.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.GULF OF CALIFORNIA LOW PRES NEAR 31N113W 1005 MB WITH COLD 
FRONT TO BEYOND 28.5N113.5W. E OF FRONT TO 111W S TO SW WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT. N OF 30N AND W OF 113.5W NW WINDS 
20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LOW NE OF AREA AND COLD FRONT DISSIPATED. 
WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 10N TO 12N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE 
TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.12 HOUR FORECAST FROM 09.5N TO 11.5N E OF 89W...INCLUDING GULF 
OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT. 
.24 HOUR FORECAST FROM 10N TO 11.5N E OF 88W...INCLUDING GULF OF 
PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT. FROM 08.5N 
TO 11N BETWEEN 88W AND 92W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT 
IN MIXED NW AND NE SWELL.
.36 HOUR FORECAST FROM 08N TO 11N BETWEEN 90W AND 94W WINDS 20 
KT OR LESS. SEAS 8 TO 9 FT IN MIXED NW AND NE SWELL.
.48 HOUR FORECAST FROM 10N TO 12N E OF 88W...INCLUDING GULF OF 
PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.18 HOUR FORECAST N OF 14.5N BETWEEN 94W AND 95W...INCLUDING 
GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST N OF 14N BETWEEN 94.5W AND 95.5W...INCLUDING 
GULF OF TEHUANTEPEC...N WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST N OF 14.5N BETWEEN 94.5W AND 95.5W...INCLUDING 
GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 1430 UTC SUN DEC 17...

.SCATTERED MODERATE ISOLATED STRONG FROM 02N TO 06N BETWEEN 78W 
AND 81W.

.SCATTERED MODERATE ISOLATED STRONG FROM 13N TO 17N BETWEEN 
106W AND 112W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 05.5N96W TO 10N123W TO 10N140W. NO SIGNIFICANT 
CONVECTION.

$$

.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.
Last Update:16:00Z, 17 December 2017
Updates: Four times per day