Pacific Text Briefing Package

[Printable Version]

AGPN40 KWNM 241424
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
724 AM PDT Tue Apr 24 2018

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

At this time I don't plan on making any changes to the current
grids or associated text forecast. Satellite pictures show a weak
low center W of the waters near 40N 137W. Conditions are
expected to remain weak over the offshore waters for much of hte
forecast period. The GFS continues to indicate the possibility of
gales later in the week along the central California coast. This
will need to be monitored to see if the trend continues.

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

The current 06Z surface analysis shows a cold front approaching
the PZ5 waters from the NW. The front extends SW and becomes
nearly stationary W of the southern Oregon and northern PZ6
offshore waters while leading into a weak low near 40N 136W which
appears on GOES-15 water vapor imagery associated with an upper 
low which appears nearly statioary. The front then continues S
from the low to 30N 140W. Over the offshore waters the ridge has
dissipated with the flow mostly northerly on the west side of a
coastal low pressure trough. Pressure gradients are relatively
weak. No recent ASCAT imagery is available, and available surface
observations in and near the coastal and offshore areas show
mostly winds 20 kt or less, in line with 00Z model fields.

The 00Z models show the aforementioned low on the front gradually
sinking S as the frontal boundary dissipates. The strongest winds
will be west of this low but winds are likely to increase behind
the front over the PZ5 waters as it enters the waters today. A 
second low center will form in the low pressure trough central 
or northern California and move offshore by early Wed and is
likely associated with an upper shortwave rotating around the
south and then east sides of the upper low. The weak low center 
is expected to remain nearly stationary just W of the waters late
Wed through Thu night before tracking NE across the region. A NW
flow will gradually spread over the region toward the end of the
period as the upper low and associated weak surface low(s) move 
inland. The 00Z global models are in pretty good agreement, 
especially the 00Z GFS and ECMWF. The 00Z global GEM moves the 
surface reflection of the upper low out too quickly and the 00Z
UKMET is in improved agreement with other guidance through Fri
night, but is weaker with winds in the northern waters on Day 5.
The GFS builds the high too far south Sat and Sat night relative
to other models leading to more widespread strong northerly 
winds and possible gales in the far NE, and appears the outlier.
Therefore populated winds with the representative 00Z GFS 10 
meter winds through Thu and then early Thu night transitioned to 
00Z ECMWF for the remainder of the period.

Seas...Both the 00Z ENP WW3 and 00Z ECMWF WAM appear to forecast
reasonably well during much of the remainder of the week,
depending on their associated wind forecast. I will populate the
wave grids using the corresponding model to match the winds, with
notably the ECMWF preferred especially late in the period.

.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.


.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
     None.

.PZ6 California Waters...
     None.

$$

.Forecaster Shaw/Bancroft. Ocean Prediction Center.
Last Update:14:26Z, 24 April 2018
Updates: Four times per day

FZPN25 KWBC 241532
OFFPZ5

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
832 AM PDT Tue Apr 24 2018

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.

PZZ898-250515-
832 AM PDT Tue Apr 24 2018

.SYNOPSIS FOR WASHINGTON AND OREGON WATERS...A low pressure
trough along the Washington and Oregon coasts will gradually
weaken today into Fri night. A weak low pressure area will form
just SW of the Oregon waters Wed night, remain nearly stationary
Thu and Thu night, before moving NE and dissipating over the
southern waters Fri. Another weak low will form over the northern
Washington waters Thu night before dissipating N of the area Fri.
A cold front will move SE across the waters Sat and Sat night,
while another low pressure trough forms near Vancouver Island. 

$$

PZZ800-250515-
Cape Flattery to Cape Shoalwater between 60 nm and 150 nm
offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...N to NE winds 5 to 15 kt, becoming N 10 to 20 kt. Seas 9 to
10 ft.
.TONIGHT...N winds 15 to 25 kt. Seas 8 to 10 ft.
.WED...N winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas 7 to 9
ft.
.WED NIGHT...N to NE winds 5 to 15 kt. Seas subsiding to 6 to 7 ft.
.THU...E to NE winds 5 to 15 kt. Seas 6 to 8 ft.
.THU NIGHT...S to SE winds 5 to 15 kt, becoming S to SW. Seas 6 to 8
ft.
.FRI...W to SW winds less than 10 kt, becoming SW. Seas 7 to 8 ft.
.FRI NIGHT...S to SW winds 5 to 15 kt. Seas 7 to 8 ft.
.SAT...SW winds 5 to 15 kt, becoming N. Seas 7 to 8 ft.
.SAT NIGHT...NW winds increasing to 15 to 25 kt. Seas becoming 7 to
13 ft.

$$

PZZ900-250515-
Cape Flattery to Cape Shoalwater between 150 nm and 250 nm
offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...N winds 10 to 20 kt. Seas 9 to 10 ft.
.TONIGHT...N winds increasing to 20 to 25 kt. Seas 9 to 10 ft.
.WED...N winds 15 to 25 kt. Seas 8 to 10 ft.
.WED NIGHT...N winds 10 to 20 kt. Seas becoming 6 to 9 ft.
.THU...N to NE winds 5 to 15 kt. Seas 6 to 9 ft.
.THU NIGHT...N to NE winds 5 to 15 kt. Seas 7 to 8 ft.
.FRI...Variable winds 5 to 15 kt, becoming SW. Seas 7 to 8 ft.
.FRI NIGHT...SW winds 5 to 15 kt, becoming N 10 to 20 kt. Seas 7 to
9 ft.
.SAT...N winds 15 to 25 kt. Seas 7 to 11 ft.
.SAT NIGHT...N winds 15 to 25 kt. Seas 7 to 13 ft.

$$

PZZ805-250515-
Cape Shoalwater to Cape Lookout between 60 nm and 150 nm
offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...NE winds 10 to 20 kt. Seas 9 to 10 ft.
.TONIGHT...N winds 10 to 20 kt. Seas becoming 7 to 9 ft.
.WED...N winds 10 to 20 kt, becoming NE 5 to 15 kt. Seas 7 to 8 ft.
.WED NIGHT...N to NE winds 5 to 15 kt. Seas 6 to 7 ft.
.THU...E to NE winds 5 to 15 kt, becoming S to SW. Seas 6 to 7 ft.
.THU NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt. Seas 6
to 7 ft.
.FRI...W to SW winds 5 to 10 kt, becoming SW 10 to 15 kt. Seas 6 to
8 ft.
.FRI NIGHT...S to SW winds 5 to 15 kt, becoming 5 to 10 kt. Seas 7
to 8 ft.
.SAT...W to SW winds 5 to 10 kt. Seas 7 to 8 ft.
.SAT NIGHT...Winds increasing to N to NW 10 to 20 kt. Seas 6 to 10
ft.

$$

PZZ905-250515-
Cape Shoalwater to Cape Lookout between 150 nm and 250 nm
offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...N winds 15 to 25 kt. Seas 9 to 10 ft.
.TONIGHT...N winds 15 to 25 kt. Seas 8 to 10 ft.
.WED...N winds 15 to 25 kt. Seas 7 to 10 ft.
.WED NIGHT...N to NE winds 10 to 20 kt. Seas 6 to 9 ft.
.THU...NE winds 5 to 15 kt, becoming SW. Seas 6 to 8 ft.
.THU NIGHT...SW winds 5 to 15 kt. Seas 6 to 8 ft.
.FRI...W to SW winds 5 to 15 kt. Seas 7 to 8 ft.
.FRI NIGHT...S to SW winds less than 10 kt. Seas 7 to 8 ft.
.SAT...N to NW winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 7
to 10 ft.
.SAT NIGHT...N winds 15 to 25 kt. Seas 7 to 11 ft.

$$

PZZ810-250515-
Cape Lookout to Florence, OR between 60 nm and 150 nm offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...NE winds 10 to 20 kt, becoming 10 to 15 kt. Seas 9 to 10
ft.
.TONIGHT...N to NE winds 10 to 20 kt. Seas becoming 7 to 9 ft.
.WED...NE winds 5 to 15 kt. Seas 6 to 8 ft.
.WED NIGHT...NE winds 5 to 10 kt, becoming E to NE 5 to 15 kt. Seas
6 to 7 ft.
.THU...SW winds 5 to 15 kt, becoming S to SW 5 to 10 kt. Seas 6 to 7
ft.
.THU NIGHT...W to SW winds 5 to 10 kt. Seas 6 to 7 ft.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 6 to 8
ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas 7 to 8 ft.
.SAT...W to SW winds less than 10 kt. Seas 7 to 8 ft.
.SAT NIGHT...W to NW winds 5 to 10 kt, becoming N to NW 5 to 15 kt.
Seas 6 to 8 ft.

$$

PZZ910-250515-
Cape Lookout to Florence, OR between 150 nm and 250 nm offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...N winds 15 to 25 kt. Seas 9 to 11 ft.
.TONIGHT...N winds 15 to 25 kt. Seas 8 to 10 ft.
.WED...N to NE winds 15 to 25 kt. Seas 7 to 10 ft.
.WED NIGHT...NE winds 10 to 20 kt, becoming E to NE 5 to 15 kt. Seas
6 to 9 ft.
.THU...E to NE winds 5 to 15 kt, becoming S 5 to 10 kt. Seas 6 to 7
ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 6 to 8 ft.
.FRI...W to SW winds less than 10 kt, becoming S to SW. Seas 7 to 8
ft.
.FRI NIGHT...S winds less than 10 kt, becoming variable. Seas 7 to 8
ft.
.SAT...Variable winds less than 10 kt, becoming N to NW. Seas 7 to 8
ft.
.SAT NIGHT...N winds increasing to 15 to 25 kt. Seas 7 to 10 ft.

$$

PZZ815-250515-
Florence, OR to Point St. George between 60 nm and 150 nm
offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...N to NW winds 5 to 15 kt, becoming N to NE. Seas 9 to 10
ft.
.TONIGHT...NE winds 5 to 15 kt, becoming variable. Seas becoming 7
to 9 ft.
.WED...Variable winds less than 10 kt. Seas 6 to 8 ft.
.WED NIGHT...Variable winds less than 10 kt, becoming S to SW. Seas
6 to 7 ft.
.THU...S to SW winds 5 to 10 kt. Seas 5 to 7 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 6 to 7 ft.
.FRI...SW winds 5 to 10 kt, becoming S 5 to 15 kt. Seas 6 to 8 ft.
.FRI NIGHT...SW winds less than 10 kt, becoming variable. Seas 7 to
8 ft.
.SAT...Variable winds less than 5 kt, becoming W. Seas 7 to 8 ft.
.SAT NIGHT...W to NW winds less than 10 kt. Seas 6 to 8 ft.

$$

PZZ915-250515-
Florence, OR to Point St. George between 150 nm and 250 nm
offshore-
832 AM PDT Tue Apr 24 2018

.TODAY...N winds 10 to 20 kt. Seas 9 to 11 ft.
.TONIGHT...N winds 15 to 25 kt. Seas becoming 7 to 10 ft.
.WED...NE winds 10 to 20 kt. Seas 7 to 10 ft.
.WED NIGHT...E to NE winds 5 to 15 kt. Seas subsiding to 6 to 8 ft.
.THU...S winds 5 to 15 kt. Seas 6 to 7 ft.
.THU NIGHT...S to SW winds less than 10 kt. Seas 6 to 8 ft.
.FRI...W to SW winds less than 10 kt. Seas 6 to 8 ft.
.FRI NIGHT...W to SW winds less than 10 kt. Seas 7 to 8 ft.
.SAT...W to NW winds less than 10 kt. Seas 7 to 8 ft.
.SAT NIGHT...N to NW winds increasing to 15 to 25 kt. Seas 7 to 10
ft.

$$

.Forecaster Shaw. Ocean Prediction Center.
Last Update:15:34Z, 24 April 2018
Updates: Four times per day

FZPN26 KWBC 241533
OFFPZ6

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
833 AM PDT Tue Apr 24 2018

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.

PZZ899-250515-
833 AM PDT Tue Apr 24 2018

.SYNOPSIS FOR CALIFORNIA WATERS...A high pressure ridge will
remain NW of the area while slowly weakening, while a low
pressure trough continues near the central and northern
California coasts today and tonight. The trough will move 
offshore Wed and Wed night, while a weak low pressure area forms 
just NW of the northern waters. The low will remain nearly 
stationary just NW of the area Thu and Thu night, then move 
slowly NE and pass N of the waters Fri and Fri night while 
weakening. A high pressure ridge will strengthen W of the region 
Sat and Sat night.

$$

PZZ820-250515-
Point St. George to Point Arena between 60 nm and 150 nm
offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...NW winds 5 to 15 kt. Seas 8 to 10 ft.
.TONIGHT...NW winds 5 to 15 kt, becoming N to NW 5 to 10 kt. Seas 7
to 9 ft.
.WED...Variable winds less than 5 kt. Seas 6 to 8 ft.
.WED NIGHT...S to SW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU...SW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU NIGHT...W to SW winds less than 10 kt. Seas 6 to 7 ft.
.FRI...S to SW winds 5 to 15 kt, becoming 5 to 10 kt. Seas 6 to 7
ft.
.FRI NIGHT...W to SW winds 5 to 15 kt, becoming variable. Seas 7 to
8 ft.
.SAT...N to NW winds 5 to 15 kt. Seas 7 to 8 ft.
.SAT NIGHT...NW winds 5 to 15 kt. Seas 7 to 8 ft.

$$

PZZ920-250515-
Point St. George to Point Arena between 150 nm and 250 nm
offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...N winds 10 to 15 kt, becoming N to NW 10 to 20 kt. Seas 9
to 10 ft.
.TONIGHT...N to NW winds 10 to 20 kt, diminishing to 5 to 15 kt.
Seas becoming 7 to 9 ft.
.WED...N to NW winds less than 10 kt, becoming variable. Seas 6 to 8
ft.
.WED NIGHT...SW winds less than 10 kt, increasing to 5 to 15 kt.
Seas 6 to 7 ft.
.THU...S to SW winds 5 to 15 kt. Seas 6 to 7 ft.
.THU NIGHT...SW winds 5 to 15 kt, diminishing to less than 10 kt.
Seas 6 to 7 ft.
.FRI...SW winds 5 to 10 kt, becoming W to SW 5 to 15 kt. Seas 6 to 7
ft.
.FRI NIGHT...W winds 5 to 15 kt, becoming NW. Seas building to 7 to
9 ft.
.SAT...NW winds 5 to 15 kt. Seas 7 to 8 ft.
.SAT NIGHT...NW winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 7
to 9 ft.

$$

PZZ825-250515-
Point Arena to Pigeon Point between 60 nm and 150 nm offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...NW winds 10 to 15 kt, diminishing to 5 to 10 kt. Seas 7 to
9 ft.
.TONIGHT...N to NW winds 5 to 10 kt. Seas 7 to 9 ft.
.WED...Variable winds less than 5 kt, becoming SW. Seas 6 to 8 ft.
.WED NIGHT...SW winds less than 10 kt. Seas 6 to 7 ft.
.THU...W to SW winds less than 5 kt. Seas 6 to 7 ft.
.THU NIGHT...W to SW winds less than 10 kt. Seas 6 to 7 ft.
.FRI...SW winds 5 to 10 kt. Seas 6 to 7 ft.
.FRI NIGHT...W to SW winds 5 to 15 kt. Seas 6 to 8 ft.
.SAT...W to NW winds 10 to 15 kt. Seas 7 to 9 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Seas 7 to 9 ft.

$$

PZZ925-250515-
Point Arena to Pigeon Point between 150 nm and 250 nm offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...N to NW winds 10 to 15 kt, diminishing to 5 to 10 kt. Seas
8 to 9 ft.
.TONIGHT...N to NW winds 5 to 10 kt. Seas 7 to 9 ft.
.WED...Variable winds less than 5 kt, becoming SW. Seas 6 to 8 ft.
.WED NIGHT...SW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU...W to SW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU NIGHT...W to SW winds 5 to 15 kt. Seas 6 to 7 ft.
.FRI...W to SW winds 10 to 15 kt. Seas 6 to 7 ft.
.FRI NIGHT...W winds 10 to 15 kt, becoming 10 to 20 kt. Seas
building to 7 to 9 ft.
.SAT...NW winds 10 to 15 kt. Seas 8 to 9 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Seas 7 to 9 ft.

$$

PZZ830-250515-
Pigeon Point to Point Piedras Blancas between 60 nm and 150 nm
offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...NW winds 5 to 10 kt. Seas 6 to 8 ft.
.TONIGHT...NW winds 5 to 10 kt. Seas 7 to 9 ft.
.WED...W to NW winds less than 10 kt. Seas 6 to 8 ft.
.WED NIGHT and THU...W to NW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU NIGHT...W to NW winds less than 10 kt. Seas 6 to 7 ft.
.FRI...W winds less than 10 kt. Seas 6 to 7 ft.
.FRI NIGHT...W winds 5 to 15 kt. Seas 6 to 8 ft.
.SAT...W winds 10 to 15 kt, becoming NW. Seas 7 to 8 ft.
.SAT NIGHT...NW winds 10 to 15 kt, becoming 10 to 20 kt. Seas 8 to 9
ft.

$$

PZZ930-250515-
Pigeon Point to Point Piedras Blancas between 150 nm and 250 nm
offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...N to NW winds 5 to 10 kt. Seas 7 to 9 ft.
.TONIGHT...NW winds less than 10 kt. Seas 7 to 9 ft.
.WED...Variable winds less than 5 kt, becoming SW. Seas 6 to 8 ft.
.WED NIGHT and THU...W to SW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU NIGHT...W winds 5 to 15 kt. Seas 6 to 7 ft.
.FRI...W winds 10 to 15 kt. Seas 6 to 7 ft.
.FRI NIGHT...W winds 10 to 15 kt, becoming 10 to 20 kt. Seas
building to 7 to 9 ft.
.SAT...W to NW winds 15 to 20 kt, becoming NW 10 to 15 kt. Seas 7 to
9 ft.
.SAT NIGHT...NW winds 10 to 15 kt. Seas 8 to 9 ft.

$$

PZZ835-250515-
Point Piedras Blancas to Santa Cruz Island, CA between 60 nm and
150 nm offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...NW winds 5 to 10 kt. Seas 6 to 7 ft.
.TONIGHT...NW winds 5 to 10 kt. Seas 6 to 8 ft.
.WED...NW winds less than 5 kt, becoming W. Seas 7 to 8 ft.
.WED NIGHT...NW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU and THU NIGHT...NW winds 5 to 15 kt. Seas 6 to 7 ft.
.FRI...NW winds 10 to 20 kt. Seas 6 to 7 ft.
.FRI NIGHT...NW winds 15 to 25 kt. Seas 6 to 8 ft.
.SAT...NW winds 10 to 20 kt. Seas 7 to 8 ft.
.SAT NIGHT...NW winds 15 to 25 kt. Seas 8 to 9 ft.

$$

PZZ935-250515-
Point Piedras Blancas to Santa Cruz Island, CA between 150 nm
and 250 nm offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...N to NW winds 5 to 10 kt. Seas 6 to 8 ft.
.TONIGHT...N to NW winds less than 10 kt. Seas 7 to 8 ft.
.WED...W to NW winds less than 10 kt. Seas 6 to 8 ft.
.WED NIGHT...W to NW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU...W winds 5 to 10 kt. Seas 6 to 7 ft.
.THU NIGHT and FRI...W to NW winds 5 to 15 kt. Seas 6 to 7 ft.
.FRI NIGHT...W to NW winds 5 to 15 kt. Seas 6 to 8 ft.
.SAT...NW winds 10 to 20 kt, becoming 10 to 15 kt. Seas 7 to 9 ft.
.SAT NIGHT...NW winds 10 to 20 kt. Seas 8 to 9 ft.

$$

PZZ840-250515-
Santa Cruz Island, CA to San Clemente Island, CA between 60 nm
and 150 nm offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...NW winds 5 to 10 kt. Seas 4 to 7 ft.
.TONIGHT and WED...W to NW winds 5 to 10 kt. Seas 4 to 8 ft.
.WED NIGHT...NW winds 5 to 15 kt. Seas 4 to 7 ft.
.THU...NW winds 10 to 15 kt. Seas 4 to 7 ft.
.THU NIGHT...NW winds 10 to 20 kt. Seas 5 to 8 ft.
.FRI...NW winds 15 to 25 kt. Seas 6 to 9 ft.
.FRI NIGHT...NW winds 15 to 25 kt. Seas 6 to 11 ft.
.SAT...NW winds 15 to 25 kt. Seas 7 to 11 ft.
.SAT NIGHT...NW winds 20 to 30 kt. Seas 8 to 10 ft.

$$

PZZ940-250515-
Santa Cruz Island, CA to 120W between 150 nm and 250 nm offshore-
833 AM PDT Tue Apr 24 2018

.TODAY...N to NW winds 5 to 10 kt. Seas 6 to 7 ft.
.TONIGHT...N to NW winds 5 to 10 kt. Seas 6 to 8 ft.
.WED...NW winds less than 5 kt, becoming W. Seas 7 to 8 ft.
.WED NIGHT...NW winds 5 to 10 kt. Seas 6 to 7 ft.
.THU...NW winds 5 to 15 kt, becoming 5 to 10 kt. Seas 6 to 7 ft.
.THU NIGHT...NW winds 5 to 15 kt. Seas 6 to 8 ft.
.FRI...NW winds 10 to 20 kt. Seas 6 to 8 ft.
.FRI NIGHT...NW winds 15 to 25 kt. Seas 6 to 10 ft.
.SAT...NW winds 10 to 20 kt. Seas 7 to 10 ft.
.SAT NIGHT...NW winds 10 to 20 kt. Seas 8 to 9 ft.

$$

PZZ945-250515-
San Clemente Island, CA to Guadalupe Island from 60 nm offshore
west to 120W-
833 AM PDT Tue Apr 24 2018

.TODAY...W to NW winds 5 to 10 kt. Seas 4 to 6 ft.
.TONIGHT and WED...W to NW winds 5 to 10 kt. Seas 4 to 7 ft.
.WED NIGHT...NW winds 5 to 10 kt, becoming 5 to 15 kt. Seas 4 to 7
ft.
.THU...NW winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 4 to 7
ft.
.THU NIGHT...NW winds 10 to 15 kt, becoming 10 to 20 kt. Seas 4 to 8
ft.
.FRI...NW winds 10 to 20 kt. Seas becoming 7 to 9 ft.
.FRI NIGHT...NW winds 15 to 25 kt. Seas 8 to 10 ft.
.SAT and SAT NIGHT...NW winds 15 to 25 kt. Seas 9 to 11 ft.

$$

.Forecaster Shaw. Ocean Prediction Center.
Last Update:15:34Z, 24 April 2018
Updates: Four times per day

FZPN01 KWBC 241536
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1630 UTC TUE APR 24 2018 

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. 

SEE ANNOUNCEMENT OF PLANNED INMARSAT I-3 TO I-4 MIGRATION 
IN 2018 AT OCEAN.WEATHER.GOV/GMDSS_NOTICE.PHP (LOWERCASE). 

SECURITE 

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

SYNOPSIS VALID 1200 UTC APR 24. 
24 HOUR FORECAST VALID 1200 UTC APR 25. 
48 HOUR FORECAST VALID 1200 UTC APR 26. 

.WARNINGS. 

...GALE WARNING... 
.COMPLEX LOW WITH MAIN CENTER 55N174W 971 MB MOVING NE 15 KT. 
WITHIN 660 NM SE...960 NM S AND SW...AND BETWEEN 180 NM AND 480 
NM W QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 22 FT...EXCEPT 9 TO 
16 FT IN THE BERING SEA. ELSEWHERE WITHIN 1200 NM SW QUADRANT 
WINDS TO 25 KT. SEAS 8 TO 16 FT.  
.24 HOUR FORECAST COMBINED LOW 60N167W 986 MB. WITHIN 600 NM SE 
AND 960 NM SE QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 21 FT. 
ELSEWHERE WITHIN 1320 NM S AND SW QUADRANTS WINDS TO 25 KT. SEAS 
8 TO 15 FT. 
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED. 

...GALE WARNING...
.LOW 59N164W 976 MB MOVING NW 15 KT. FRONT EXTENDS FROM THE LOW 
TO 54N159W TO 45N163W TO 39N169W. WITHIN 420 NM E OF THE FRONT 
WINDS 25 TO 40 KT. SEAS 11 TO 21 FT. ELSEWHERE WITHIN 540 NM E 
OF THE FRONT WINDS TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 64N171W 975 MB. OVER ICE FREE WATERS 
WITHIN 240 NM SE SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW W OF AREA 64N172W 992 MB. WITHIN 180 NM SE 
SEMICIRCLE WINDS TO 25 KT. SEAS TO 8 FT. 

...GALE WARNING...
.LOW 39N137W 1018 MB MOVING S 15 KT. WITHIN 240 NM W AND NW 
QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 34N137W 1019 MB. WITHIN 420 NM W AND NW 
QUADRANTS WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED. 

...GALE WARNING... 
.48 HOUR FORECAST OVER FORECAST WATERS FROM 36N TO 52N W OF 167E 
AREA OF S TO SE WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. 

.SYNOPSIS AND FORECAST. 

.LOW 43N125W 1014 MB MOVING W 05 KT. WITHIN 240 NM NW QUADRANT 
WINDS LESS THAN 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 43N127W 1014 MB. WITHIN 600 NM NW QUADRANT 
WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW 43N132W 1012 MB. WITHIN 420 NM W AND NW 
QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.  

.24 HOUR FORECAST LOW 43N162E 1018 MB. WITHIN 240 NM S 
SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 10 FT. 
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.48 HOUR FORECAST OVER FORECAST WATERS N OF 52N W OF 175W AREA 
OF W TO SW WINDS TO 25 KT. SEAS TO 10 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM E OF 
A LINE FROM 54N159W TO 46N162W.
.24 HOUR FORECAST CONDITIONS IMPROVED. 

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM W 
OF A LINE FROM 50N162E TO 44N170E TO 33N162E.

.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY OVER ICE FREE 
FORECAST WATERS N OF 62N W OF ALASKA.
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF 62N W OF ALASKA.

.HIGH 40N150W 1034 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE. 
.48 HOUR FORECAST HIGH 37N150W 1028 MB. 

.HIGH 36N166E 1032 MB MOVING E 20 KT. 
.24 HOUR FORECAST HIGH 36N175E 1035 MB. 
.48 HOUR FORECAST HIGH 39N179W 1038 MB. 

.FORECASTER REINHART. 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 TUE APR 24.
24 HOUR FORECAST VALID 1200 UTC WED APR 25.
48 HOUR FORECAST VALID 1200 UTC THU APR 26.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.COLD FRONT FROM 30N129W TO 28N140W. W OF LINE FROM 30N133W TO 
25N140W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NW SWELL.
.24 HOUR FORECAST DISSIPATING COLD FRONT FROM 30N132W TO 26N140W.
W OF LINE FROM 30N133W TO 26N140W WINDS 20 KT OR LESS. SEAS TO 8 
FT IN NW SWELL.
.36 HOUR FORECAST FRONT DISSIPATED. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.WITHIN AREA BOUNDED BY A LINE FROM 18N140W TO 12N125W TO 
07N130W TO 10N140W TO 18N140W WINDS 20 KT OR LESS. SEAS TO 9 FT 
IN NW SWELL.
.24 HOUR FORECAST FROM 08N TO 18N W OF 125W WINDS 20 KT OR LESS. 
SEAS TO 8 FT. 
.48 HOUR FORECAST FROM 10N TO 17N W OF 122W WINDS 20 KT OR LESS. 
SEAS TO 8 FT.  

.S OF LINE FROM 03.4S82W TO 01S120W WINDS 20 KT OR LESS. SEAS TO 
9 FT IN S SWELL.
.24 HOUR FORECAST S OF LINE FROM 03.4S96W TO 02S120W WINDS 20 KT 
OR LESS. SEAS TO 8 FT IN S SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.N OF 14.5N BETWEEN 94.5W AND 96W...INCLUDING THE GULF OF 
TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

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

CONVECTION VALID AT 1500 UTC TUE APR 24...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 09N84W TO 07N98W. ITCZ FROM 07N98W TO 08N114W TO 
06N130W TO 07N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 
180 NM OF LINE FROM 06N77W TO 08N86W TO 05N103W AND WITHIN 240 
NM OF LINE FROM 04N104W TO 11N118W.

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.
Last Update:15:37Z, 24 April 2018
Updates: Four times per day