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Pacific Text Briefing Package

[Printable Version]

AGPN40 KWNM 181051 CCB
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
247 AM PDT Thu Apr 18 2019

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

06Z surface analysis shows a warm front about to move N of the 
waters while a cold front enters the far NW waters, and high 
pressure remains W of the PZ6 waters with a ridge extending 
across the northern PZ6 waters and into the SE Oregon watrs. An 
ASCAT-A pass from 0535Z returned SE winds 20 to 25 kt in the far 
NE PZ5 waters associated with the warm front and another area of 
20 to 25 kt off the central and northern California coast, 
highest in the coastal waters near Cape Mendocino. Winds 
elsewhere across the offshore zones were observed at 5 to 15 
kts. 

A strong low well NW of the PZ5 waters is moving away from the 
waters with a cold front moving over the northern PZ5 waters 
while slowing as it stalls across the northern PZ5 waters today. 
The front will then push SE across the waters Thu night into Sat 
after a frontal wave cross the northern PZ5 waters later today 
into tonight. High pressure will build N and NE behind the front 
and inland into British Columbia while forcing a lee trough 
alkng the coast of Washington and Vancouver Island later Fri 
with NW winds picking up to 25 kt across the NE PZ5 waters. The 
coastal trough will strengthen further south along the 
California southern Oregon coasts on Saturday when model 
consensus has been calling for gradients to reach a maximum. 
Winds to 25 kts and as high as 30 kt are possible across the 
inner PZ6 zones and these conditions should persist into Monday 
with broad high pressure settling in through the end of the 
period. Further north a pair of lows will pass in close 
succession to the northwest of the PZ5 waters with the first 
passing NW near the region on Mon and the second on Tue. Each 
passing low will bring a period of winds increasing to 10 to 20 
kts across the northern PZ5 waters. High pressure will build 
west of the PZ5 waters on Wed with northerly winds of 10 to 20 
kts expected across much of the PZ5 and northern PZ6 waters.

00Z model guidance was in good agreement with no major cyclones 
expected to affect the offshore zones through the forecast 
period. There was particularly good agreement through 00Z Sat 
when the 00Z GFS is preferred. After that opted to continue 
using the most consistent ECMWF through Sun night. Some minor 
differences are noted with the pair of lows passing northwest of 
the region on Monday and Tuesday. The new 00Z ECMWF has a more 
robust shortwave moving into the Gulf of Alaska and an 
associated deeper second surface low versus its previous run 
with UKMET similar while GFS is weaker and more like the old 
ECMWF, and the 00Z Canadian becomes out of sync by Tue. The 
first low on Tue is weakening as it passes NW of the area and 
betetr handled by models. The best consensus is with using an 
even blend 00Z GFS/ECMWF solution Mon and Mon night and then 
using the old 17/12Z ECMWF in the blend after that. No solution 
shows the potential for hazardous wind and waves. 

.SEAS...
The 00Z Wavewatch and 00Z ECMWF WAM intialize within a foot or 
so of 06Z observations and sea state analysis. Through Fri with 
differences small used an even blend of the 00Z Guidance. After 
that choice of wave model or blend is reflected in the aoce 
choice of model or model blend for winds.

.EXTRATROPICAL STORM SURGE GUIDANCE...NA

.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
     None.

.PZ6 California Waters...
     None.

$$

.Forecaster Bancroft. Ocean Prediction Center.
Last Update:10:52Z, 18 April 2019
Updates: Four times per day

FZPN25 KWBC 181018
OFFPZ5

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
318 AM PDT Thu Apr 18 2019

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.

PZZ898-182215-
318 AM PDT Thu Apr 18 2019

.SYNOPSIS FOR WASHINGTON AND OREGON WATERS...A cold front will
become stationary across the NW waters today. A weak low center 
will track NE along the front across the N waters later today
into tonight and push the front SE across the waters as a cold
front tonight into Fri. High pressure will build W of the area 
Fri and Fri night and persist into Sat night. The next frontal 
system will approach from the W Sat night and move over the 
region Sun into Sun night while weakening. Another frontal system
will approach Sun night and then another wave of low pressure 
will pass to the NW Mon and Mon night.

$$

PZZ800-182215-
Cape Flattery to Cape Shoalwater between 60 NM and 150 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...S to SW winds 10 to 20 kt. Seas 8 to 11 ft. Chance of
rain and areas of fog with VSBY 1 nm or less. 
.TONIGHT...SW winds 10 to 15 kt, becoming N to NW 5 to 15 kt.
Seas 9 to 11 ft. Chance of rain and areas of fog with VSBY 1 nm
or less. 
.FRI...N to NW winds 15 to 25 kt. Seas 8 to 9 ft. 
.FRI NIGHT...NW winds 20 to 30 kt. Seas 8 to 11 ft. 
.SAT...N to NW winds 15 to 25 kt. Seas 6 to 9 ft. 
.SAT NIGHT...NW winds 10 to 20 kt. Seas 6 to 7 ft. 
.SUN...W to NW winds 5 to 15 kt, becoming S to SW. Seas 4 to
6 ft. 
.SUN NIGHT...S to SW winds 5 to 15 kt, becoming S 10 to 20 kt.
Seas 4 to 8 ft. 
.MON...S winds 15 to 20 kt. Seas 6 to 8 ft. 
.MON NIGHT...SW winds 10 to 15 kt, becoming S 10 to 20 kt. Seas
6 to 8 ft. 

$$

PZZ900-182215-
Cape Flattery to Cape Shoalwater between 150 NM and 250 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...S to SW winds 10 to 20 kt. Seas 8 to 12 ft. Chance of
rain. Areas of fog. VSBY 1 NM or less. 
.TONIGHT...SW winds 5 to 15 kt, becoming N. Seas 9 to 11 ft.
Chance of rain with VSBY 1 nm or less. 
.FRI...N to NW winds 10 to 15 kt, becoming N 15 to 20 kt. Seas
7 to 9 ft. 
.FRI NIGHT...N to NW winds 15 to 25 kt. Seas 7 to 9 ft. 
.SAT...N winds 15 to 25 kt, becoming NW 10 to 20 kt. Seas 6 to
9 ft. 
.SAT NIGHT...W to NW winds 10 to 20 kt, becoming W to SW. Seas
5 to 7 ft. 
.SUN...SW winds 5 to 15 kt, becoming S 10 to 20 kt. Seas 5 to
8 ft. 
.SUN NIGHT...S winds 15 to 25 kt. Seas 6 to 10 ft. 
.MON...S to SW winds 15 to 25 kt. Seas 7 to 10 ft. 
.MON NIGHT...SW winds 10 to 15 kt, becoming S 15 to 25 kt. Seas
7 to 9 ft. 

$$

PZZ805-182215-
Cape Shoalwater to Cape Lookout between 60 NM and 150 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...S winds 10 to 15 kt, becoming S to SW 10 to 20 kt. Seas
7 to 10 ft. Areas of fog with VSBY 1 nm or less. 
.TONIGHT...W to SW winds 10 to 15 kt, becoming W 5 to 10 kt.
Seas 7 to 10 ft. Areas of fog with VSBY 1 nm or less. 
.FRI...W to NW winds 10 to 15 kt, becoming N 10 to 20 kt. Seas
8 to 9 ft. Areas of fog with VSBY 1 nm or less early. 
.FRI NIGHT...N winds 15 to 25 kt. Seas 8 to 9 ft. 
.SAT...N winds 15 to 20 kt. Seas 7 to 9 ft. 
.SAT NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt.
Seas 6 to 8 ft. 
.SUN...NW winds 5 to 15 kt, becoming W to SW. Seas 5 to 6 ft. 
.SUN NIGHT...W to SW winds 5 to 10 kt, becoming S 5 to 15 kt.
Seas 4 to 6 ft. 
.MON...S winds 10 to 20 kt. Seas 5 to 7 ft. 
.MON NIGHT...SW winds 10 to 15 kt, becoming S. Seas 5 to 7 ft. 

$$

PZZ905-182215-
Cape Shoalwater to Cape Lookout between 150 NM and 250 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...S to SW winds 10 to 20 kt. Seas 7 to 11 ft. Areas of
fog with VSBY 1 nm or less. Chance of rain with VSBY 1 nm or
less. 
.TONIGHT...SW winds 10 to 15 kt, becoming N to NW. Seas 9 to
11 ft. Areas of fog and chance of rain with VSBY 1 nm or less. 
.FRI...N winds 10 to 15 kt, becoming 10 to 20 kt. Seas 7 to
9 ft. 
.FRI NIGHT...N winds 15 to 20 kt. Seas 7 to 9 ft. 
.SAT...N to NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.SAT NIGHT...NW winds 10 to 20 kt, becoming W to NW 5 to 15 kt.
Seas 6 to 7 ft. 
.SUN...S to SW winds 5 to 15 kt. Seas 5 to 6 ft. 
.SUN NIGHT...S to SW winds 10 to 20 kt. Seas 4 to 8 ft. 
.MON...S to SW winds 15 to 20 kt. Seas 5 to 8 ft. 
.MON NIGHT...SW winds 10 to 15 kt, becoming S to SW 10 to 20 kt.
Seas 6 to 9 ft. 

$$

PZZ810-182215-
Cape Lookout to Florence, OR between 60 NM and 150 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...S winds less than 10 kt, becoming S to SW. Seas 7 to
10 ft. Areas of fog with VSBY 1 nm or less. 
.TONIGHT...W winds 5 to 10 kt. Seas 7 to 9 ft. Areas of fog with
VSBY 1 nm or less. 
.FRI...W to NW winds 5 to 15 kt, becoming N to NW 10 to 20 kt.
Seas 7 to 9 ft. Areas of fog with VSBY 1 nm or less early. 
.FRI NIGHT...N winds 15 to 20 kt. Seas 7 to 9 ft. 
.SAT...N winds 15 to 20 kt. Seas 8 to 9 ft. 
.SAT NIGHT...N to NW winds 15 to 20 kt. Seas 6 to 8 ft. 
.SUN...N winds 10 to 15 kt, diminishing to less than 10 kt. Seas
5 to 7 ft. 
.SUN NIGHT...N to NW winds 5 to 15 kt, becoming variable. Seas
4 to 5 ft. 
.MON...S winds 5 to 15 kt, becoming SW 10 to 15 kt. Seas 4 to
6 ft. 
.MON NIGHT...S to SW winds 5 to 10 kt. Seas 5 to 6 ft. 

$$

PZZ910-182215-
Cape Lookout to Florence, OR between 150 NM and 250 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...SW winds 10 to 15 kt. Seas 7 to 10 ft. Areas of fog
with VSBY 1 nm or less. 
.TONIGHT...SW winds 10 to 15 kt, becoming W to SW 5 to 10 kt.
Seas 8 to 10 ft. Areas of fog with VSBY 1 nm or less. 
.FRI...N to NW winds 10 to 15 kt, becoming N 10 to 20 kt. Seas
7 to 9 ft. 
.FRI NIGHT...N winds 15 to 20 kt. Seas 7 to 8 ft. 
.SAT...N winds 10 to 20 kt. Seas 6 to 8 ft. 
.SAT NIGHT...NW winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas 6 to 7 ft. 
.SUN...N to NW winds 5 to 15 kt, becoming SW. Seas 5 to 6 ft. 
.SUN NIGHT...SW winds 5 to 15 kt, becoming S 10 to 20 kt. Seas
4 to 7 ft. 
.MON...S to SW winds 10 to 15 kt. Seas 5 to 7 ft. 
.MON NIGHT...SW winds 10 to 15 kt. Seas 5 to 7 ft. 

$$

PZZ815-182215-
Florence, OR to Point St. George between 60 NM and 150 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...Variable winds less than 10 kt, becoming W. Seas 7 to
9 ft. Areas of fog with VSBY 1 nm or less. 
.TONIGHT...W to NW winds 5 to 10 kt. Seas 7 to 9 ft. Areas of
fog with VSBY 1 nm or less. 
.FRI...W to NW winds 5 to 10 kt, becoming N to NW 10 to 15 kt.
Seas 7 to 8 ft. Areas of fog with VSBY 1 nm or less early. 
.FRI NIGHT...N winds 15 to 25 kt. Seas 7 to 9 ft. 
.SAT...N winds 15 to 25 kt. Seas 8 to 11 ft. 
.SAT NIGHT...N winds 15 to 25 kt. Seas 6 to 10 ft.
.SUN...N winds 10 to 20 kt. Seas 5 to 8 ft. 
.SUN NIGHT...N winds 10 to 20 kt. Seas 4 to 8 ft. 
.MON...N to NW winds 5 to 15 kt, becoming W to SW. Seas 4 to
6 ft. 
.MON NIGHT...W to SW winds 5 to 10 kt. Seas 4 to 6 ft. 

$$

PZZ915-182215-
Florence, OR to Point St. George between 150 NM and 250 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...SW winds 5 to 15 kt. Seas 7 to 9 ft. Areas of fog with
VSBY 1 nm or less. 
.TONIGHT...W to SW winds 10 to 15 kt, becoming W 5 to 10 kt.
Seas 7 to 10 ft. Areas of fog with VSBY 1 nm or less. 
.FRI...NW winds 5 to 15 kt, becoming N 10 to 20 kt. Seas 7 to
8 ft. 
.FRI NIGHT...N winds 15 to 20 kt. Seas 7 to 8 ft. 
.SAT...N winds 15 to 25 kt. Seas 6 to 9 ft. 
.SAT NIGHT...N to NW winds 10 to 20 kt. Seas 6 to 8 ft. 
.SUN...N winds 10 to 20 kt, becoming N to NW 5 to 15 kt. Seas
5 to 7 ft. 
.SUN NIGHT...W to SW winds 5 to 15 kt, becoming S to SW. Seas
4 to 6 ft. 
.MON...SW winds 5 to 15 kt. Seas 4 to 6 ft. 
.MON NIGHT...SW winds 5 to 15 kt. Seas 5 to 7 ft. 

$$

.Forecaster Bancroft. Ocean Prediction Center.
Last Update:10:19Z, 18 April 2019
Updates: Four times per day

FZPN26 KWBC 181018
OFFPZ6

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
318 AM PDT Thu Apr 18 2019

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.

PZZ899-182215-
318 AM PDT Thu Apr 18 2019

.SYNOPSIS FOR CALIFORNIA WATERS...A high pressure ridge will
persist over the northern and central waters through tonight. 
Meanwhile, a low pressure trough along the California coast will 
persist through tonight, then strengthen Fri and Fri night as 
high pressure builds east toward the NW portion into Sat. The 
surface ridge will begin gradually retreating SW of the central 
waters late Sat night, then persist to the W of the waters 
through Mon night.

$$

PZZ820-182215-
Point St. George to Point Arena between 60 NM and 150 NM
offshore-
318 AM PDT Thu Apr 18 2019

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

$$

PZZ920-182215-
Point St. George to Point Arena between 150 NM and 250 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...N to NW winds 5 to 15 kt, becoming W to NW 5 to 10 kt.
Seas 7 to 8 ft. Areas of fog with VSBY 1 nm or less. 
.TONIGHT...W to NW winds 5 to 10 kt. Seas 7 to 8 ft. Areas of
fog with VSBY 1 nm or less. 
.FRI...N to NW winds 5 to 15 kt. Seas 7 to 8 ft. 
.FRI NIGHT...N winds 15 to 20 kt. Seas 7 to 8 ft. 
.SAT...N winds 15 to 25 kt. Seas 7 to 10 ft. 
.SAT NIGHT...N winds 15 to 25 kt. Seas 6 to 11 ft.
.SUN...N winds 15 to 25 kt. Seas 6 to 10 ft. 
.SUN NIGHT...N to NW winds 15 to 25 kt. Seas 5 to 9 ft. 
.MON...N to NW winds 10 to 20 kt, becoming W to NW 5 to 15 kt.
Seas 4 to 8 ft. 
.MON NIGHT...W to NW winds 5 to 15 kt, becoming N to NW. Seas
4 to 6 ft. 

$$

PZZ825-182215-
Point Arena to Pigeon Point between 60 NM and 150 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...N winds 10 to 20 kt, becoming 10 to 15 kt. Seas 8 to
9 ft. 
.TONIGHT...N winds 10 to 15 kt, becoming 10 to 20 kt. Seas 7 to
8 ft. 
.FRI...N winds 10 to 20 kt, becoming NW 15 to 20 kt. Seas 7 to
9 ft. 
.FRI NIGHT...N to NW winds 15 to 25 kt. Seas 7 to 10 ft. 
.SAT...N to NW winds 20 to 25 kt. Seas 8 to 11 ft. 
.SAT NIGHT...N to NW winds 25 to 30 kt. Seas 10 to 14 ft. 
.SUN...N winds 20 to 30 kt. Seas 9 to 14 ft. 
.SUN NIGHT...N to NW winds 20 to 30 kt. Seas 8 to 12 ft. 
.MON...N to NW winds 20 to 30 kt. Seas 7 to 12 ft. 
.MON NIGHT...N to NW winds 15 to 25 kt. Seas 5 to 9 ft. 

$$

PZZ925-182215-
Point Arena to Pigeon Point between 150 NM and 250 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...N to NW winds 5 to 15 kt. Seas 7 to 8 ft. 
.TONIGHT...N to NW winds 5 to 15 kt. Seas 7 to 8 ft. 
.FRI...NW winds 10 to 15 kt, becoming 10 to 20 kt. Seas 7 to
8 ft. 
.FRI NIGHT...N winds 15 to 25 kt. Seas 7 to 9 ft. 
.SAT...N winds 15 to 25 kt. Seas 7 to 10 ft. 
.SAT NIGHT...N winds 15 to 25 kt. Seas 7 to 12 ft.
.SUN...N winds 15 to 25 kt. Seas 7 to 12 ft. 
.SUN NIGHT...N winds 15 to 25 kt. Seas 6 to 11 ft. 
.MON...N to NW winds 15 to 25 kt. Seas 6 to 10 ft. 
.MON NIGHT...N to NW winds 10 to 20 kt. Seas 4 to 7 ft. 

$$

PZZ830-182215-
Pigeon Point to Point Piedras Blancas between 60 NM and 150 NM
offshore-
318 AM PDT Thu Apr 18 2019

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

$$

PZZ930-182215-
Pigeon Point to Point Piedras Blancas between 150 NM and 250 NM
offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...N winds 10 to 15 kt. Seas 7 to 8 ft. 
.TONIGHT...N winds 10 to 15 kt, becoming 10 to 20 kt. Seas 7 to
8 ft. 
.FRI...N winds 10 to 15 kt, becoming N to NW 15 to 20 kt. Seas
7 to 8 ft. 
.FRI NIGHT...N winds 15 to 25 kt. Seas 7 to 9 ft. 
.SAT...N to NW winds 15 to 25 kt. Seas 7 to 9 ft. 
.SAT NIGHT...N winds 20 to 25 kt. Seas 8 to 12 ft.
.SUN...N winds 20 to 25 kt. Seas 9 to 12 ft. 
.SUN NIGHT...N winds 20 to 25 kt. Seas 8 to 11 ft. 
.MON...N winds 15 to 25 kt. Seas 6 to 11 ft. 
.MON NIGHT...N winds 10 to 20 kt. Seas 5 to 9 ft. 

$$

PZZ835-182215-
Point Piedras Blancas to Santa Cruz Island, CA between 60 NM and
150 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...N winds 10 to 15 kt, becoming N to NW 5 to 10 kt. Seas
7 to 9 ft. 
.TONIGHT...N to NW winds 10 to 15 kt. Seas 7 to 8 ft. 
.FRI...NW winds 10 to 15 kt, becoming N to NW 10 to 20 kt. Seas
7 to 8 ft. 
.FRI NIGHT...NW winds 15 to 20 kt. Seas 7 to 9 ft. 
.SAT...NW winds 15 to 25 kt. Seas 8 to 10 ft. 
.SAT NIGHT...NW winds 20 to 25 kt. Seas 9 to 11 ft. 
.SUN...NW winds 20 to 25 kt. Seas 10 to 12 ft. 
.SUN NIGHT...N to NW winds 20 to 25 kt. Seas 11 to 12 ft. 
.MON...N winds 15 to 25 kt. Seas 9 to 11 ft. 
.MON NIGHT...N winds 15 to 25 kt. Seas 7 to 9 ft. 

$$

PZZ935-182215-
Point Piedras Blancas to Santa Cruz Island, CA between 150 NM
and 250 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...N winds 10 to 15 kt. Seas 7 to 9 ft. 
.TONIGHT...N winds 10 to 15 kt, becoming 10 to 20 kt. Seas 7 to
8 ft. 
.FRI...N winds 10 to 15 kt, becoming N to NW 10 to 20 kt. Seas
7 to 8 ft. 
.FRI NIGHT...N to NW winds 15 to 20 kt. Seas 7 to 9 ft. 
.SAT...N to NW winds 15 to 25 kt. Seas 8 to 9 ft. 
.SAT NIGHT...N winds 20 to 25 kt. Seas 8 to 11 ft.
.SUN...N winds 20 to 25 kt. Seas 8 to 12 ft. 
.SUN NIGHT...N winds 20 to 25 kt. Seas 9 to 11 ft. 
.MON...N winds 20 to 25 kt. Seas 7 to 11 ft. 
.MON NIGHT...N winds 15 to 25 kt. Seas 6 to 9 ft. 

$$

PZZ840-182215-
Santa Cruz Island, CA to San Clemente Island, CA between 60 NM
and 150 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...W to NW winds 5 to 15 kt. Seas 5 to 9 ft. 
.TONIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt. Seas
5 to 7 ft. 
.FRI...W to NW winds 10 to 15 kt. Seas 4 to 7 ft. 
.FRI NIGHT...W to NW winds 10 to 20 kt. Seas 5 to 8 ft. 
.SAT...NW winds 10 to 20 kt. Seas 5 to 9 ft. 
.SAT NIGHT...NW winds 15 to 25 kt. Seas 6 to 11 ft. 
.SUN...NW winds 15 to 25 kt. Seas 7 to 11 ft. 
.SUN NIGHT...NW winds 15 to 25 kt. Seas 6 to 11 ft. 
.MON...NW winds 15 to 25 kt. Seas 6 to 11 ft. 
.MON NIGHT...N to NW winds 10 to 20 kt. Seas 5 to 9 ft. 

$$

PZZ940-182215-
Santa Cruz Island, CA to 120W between 150 NM and 250 NM offshore-
318 AM PDT Thu Apr 18 2019

.TODAY...N winds 5 to 15 kt, becoming NW 5 to 10 kt. Seas 7 to
9 ft. 
.TONIGHT...N to NW winds 5 to 15 kt. Seas 7 to 8 ft. 
.FRI...N to NW winds 10 to 15 kt. Seas 7 to 8 ft. 
.FRI NIGHT...N to NW winds 10 to 20 kt. Seas 7 to 8 ft. 
.SAT...NW winds 10 to 20 kt. Seas 7 to 9 ft. 
.SAT NIGHT...N to NW winds 15 to 25 kt. Seas 7 to 10 ft. 
.SUN...N to NW winds 15 to 25 kt. Seas 7 to 11 ft. 
.SUN NIGHT...N to NW winds 15 to 25 kt. Seas 8 to 11 ft. 
.MON...N to NW winds 15 to 25 kt. Seas 8 to 11 ft. 
.MON NIGHT...N to NW winds 10 to 20 kt. Seas 7 to 9 ft. 

$$

PZZ945-182215-
San Clemente Island, CA to Guadalupe Island from 60 NM offshore
west to 120W-
318 AM PDT Thu Apr 18 2019

.TODAY...N to NW winds 5 to 15 kt. Seas 7 to 8 ft. 
.TONIGHT...N to NW winds 10 to 15 kt. Seas 6 to 8 ft. 
.FRI...NW winds 10 to 15 kt. Seas 6 to 7 ft. 
.FRI NIGHT...NW winds 10 to 20 kt. Seas 6 to 8 ft. 
.SAT...NW winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas
6 to 8 ft. 
.SAT NIGHT...NW winds 10 to 20 kt. Seas 6 to 9 ft. 
.SUN...NW winds 10 to 20 kt. Seas 6 to 10 ft. 
.SUN NIGHT...NW winds 10 to 20 kt. Seas 7 to 10 ft. 
.MON...NW winds 10 to 20 kt, becoming 10 to 15 kt. Seas 6 to
10 ft. 
.MON NIGHT...NW winds 5 to 15 kt. Seas 5 to 8 ft. 

$$

.Forecaster Bancroft. Ocean Prediction Center.
Last Update:10:20Z, 18 April 2019
Updates: Four times per day

FZPN01 KWBC 181018
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1030 UTC THU APR 18 2019 

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 0600 UTC APR 18. 
24 HOUR FORECAST VALID 0600 UTC APR 19. 
48 HOUR FORECAST VALID 0600 UTC APR 20. 

.WARNINGS. 

...GALE WARNING... 
.LOW 55N139W 992 MB MOVING NW 20 KT. OVER FORECAST WATERS WITHIN 
300 NM SE SEMICIRCLE AND 240 NM NE QUADRANT WINDS 30 TO 45 KT. 
SEAS 13 TO 26 FT. ELSEWHERE WITHIN 420 NM W QUADRANT WINDS 20 TO 
30 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 61N148W 992 MB. WITHIN 120 NM S SEMICIRCLE 
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT. ELSEWHERE N OF 52N BETWEEN 
139W AND 159W WINDS 20 TO 30 KT. SEAS TO 12 FT. 
.48 HOUR FORECAST LOW DISSIPATED INLAND OVER ALASKA AND 
CONDITIONS DIMINISHED. 

...GALE WARNING... 
.LOW 43N178E 997 MB MOVING NW 10 KT AND TURNING SE AFTER 06 
HOURS. WITHIN 420 NM NE OF A LINE FROM 43N174E TO 30N179W WINDS 
25 TO 35 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST COMPLEX LOW MEAN CENTER NEAR 43N174W 1001 MB. 
WITHIN 360 NM S...420 NM SE QUADRANTS...AND 480 NM NW OF A LINE 
FROM 42N176E TO 46N172W WINDS 20 TO 30 KT. SEAS 8 TO 14 FT. 
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW 
49N157W DESCRIBED BELOW. 

...GALE WARNING... 
.24 HOUR FORECAST LOW 34N162E 996 MB. OVER FORECAST WATERS FROM 
30N TO 37N W OF 175E WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. 
.48 HOUR FORECAST LOW 36N178E 997 MB. WITHIN 240 NM NW QUADRANT 
WINDS 25 TO 35 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 600 NM NW 
SEMICIRCLE AND 660 NM SE QUADRANT WINDS 20 TO 30 KT. SEAS 8 TO 
14 FT. 

...GALE WARNING... 
.24 HOUR FORECAST NEW LOW 43N168W 998 MB. WITHIN 240 NM S 
SEMICIRCLE AND 360 NM E OF A FRONT FROM 43N164W TO 36N163W TO 
30N166W WINDS 25 TO 40 KT. SEAS TO 12 FT. ELSWHERE WITHIN 90 NM 
NE QUADRANT WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW 49N157W 993 MB. WITHIN 420 NM S...360 NM 
SW...300 NM NW...BETWEEN 90 NM AND 300 NM NE QUADRANTS...AND 
WITHIN 360 NM E OF A FRONT FROM 52N152W TO 35N151W WINDS 25 TO 
40 KT. SEAS 8 TO 14 FT.

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY N OF 62N W OF 167W. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 61N 
BETWEEN 166W AND 173W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 62N W OF 
ALASKA. 

.SYNOPSIS AND FORECAST. 

.LOW 43N148W 1014 MB MOVING NE 40 KT. WITHIN 300 NM S QUADRANT 
WINDS 20 TO 30 KT. SEAS TO 12 FT. 
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED. 

.OVER ICE FREE FORECAST WATERS IN THE BERING SEA N OF 60N W OF 
ALASKA WINDS TO 25 KT. SEAS LESS THAN 8 FT. 
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS DIMINISHED. 

.48 HOUR FORECAST OVER FORECAST WATERS E OF A LINE FROM 36N127W 
TO 42N129W TO 47N129W TO 50N130W AREA OF N TO NW WINDS 20 TO 30 
KT. SEAS TO 11 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 48N 
BETWEEN 126W AND 132W.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 46N BETWEEN 125W AND 
129W AND WITHIN 90 NM OF 32N170E. 
.48 HOUR FORECAST DENSE FOG FROM 32N TO 37N BETWEEN 172E AND 
164W.

.HIGH 37N131W 1029 MB MOVING SW 25 KT. 
.24 HOUR FORECAST HIGH DISSIPATED. 

.HIGH 31N143W 1025 MB MOVING SW 10 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 33N163W 1025 MB MOVING NE 40 KT. 
.24 HOUR FORECAST HIGH 40N147W 1029 MB. 
.48 HOUR FORECAST HIGH 46N136W 1029 MB. 

.HIGH 46N167W 1018 MB MOVING E 25 KT. 
.24 HOUR FORECAST HIGH DISSIPATED. 

.48 HOUR FORECAST HIGH 51N166E 1031 MB. 

.FORECASTER JOSEPH. 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 0600 UTC THU APR 18.
24 HOUR FORECAST VALID 0600 UTC FRI APR 19.
48 HOUR FORECAST VALID 0600 UTC SAT APR 20.

.WARNINGS.

...GULF OF TEHUANTEPEC GALE WARNING...
.30 HOUR FORECAST GULF OF TEHUANTEPEC N OF 14.5N BETWEEN 94W AND 
95.5W N WINDS 25 TO 35 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W 
TO 14.5N95.5W TO 13N96W N TO NE WINDS 30 TO 40 KT. SEAS 8 TO 18 
FT. ELSEWHERE WITHIN 90 NM EITHER SIDE OF LINE FROM 16N95W TO 
14N95W TO 11N98W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 16 FT.

.SYNOPSIS AND FORECAST.

.FROM 10.5N TO 11.5N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE 
TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

.N OF 29N BETWEEN 119W AND 125W WINDS 20 KT OR LESS. SEAS 8 FT
IN NW SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 04N TO 14N W OF 123W WINDS 20 KT OR LESS. SEAS 8 FT IN 
MIXED SWELL.
.24 HOUR FORECAST FROM 08N TO 12N W OF 128W WINDS 20 KT OR LESS.
SEAS 8 FT IN MIXED NW AND SE SWELL.
.48 HOUR FORECAST FROM 07N TO 15N W OF 135W NE WINDS 20 TO 25 
KT. SEAS 9 FT. ELSEWHERE FROM 04N TO 16N W OF 130W WINDS 20 KT 
OR LESS. SEAS 8 FT IN MIXED NW AND SE SWELL.

.03 HOUR FORECAST GULF OF CALIFORNIA FROM 23N TO 26N NW WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT.
.09 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST FROM 27N TO 28N NW WINDS 20 TO 25 KT. SEAS 
LESS THAN 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 0900 UTC THU APR 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 09N83W TO 08N88W TO 06N94W TO 06N99W. TROUGH 
FROM 09N102W TO 03N105W. ITCZ FROM 05N106W TO 04N109W TO 06N117W 
TO 06N121W. SECOND TROUGH FROM 11N122W TO 03N124W. ITCZ FROM 
04N126W BEYOND 02N140W. SCATTERED TO NUMEROUS STRONG FROM 05N TO 
08N BETWEEN 121W AND 125W. 

$$ 
.FORECASTER MT. NATIONAL HURRICANE CENTER.
Last Update:10:19Z, 18 April 2019
Updates: Four times per day