AGPN40 KWNM 181505
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
805 AM PDT Sat Aug 18 2018

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

GOES water vapor imagery indicates an upper ridge in the E
Pacific, and a weak shortwave trough moving over the top of the
ridge just W of the PZ5 offshore waters. At the surface, the
latest NCEP analysis shows high pressure just W of the offshore
waters, interacting with a trough along the coast of Vancouver
Island and a second trough inland over California. The analysis
also indicates a tightened pressure gradient in between the high
and the troughs, with the max gradients to the SE of Vancouver
Island over PZ5 and off the northern California coast to the W of
Point Arena. 05Z Ascat wind retrievals from earlier showed higher
winds associated with the stronger pressure gradient, with up to
35 kt near Point Saint George in the coastal waters and up to 25
kt off of Vancouver Island. Current surface observations show up
to 30 kt off the srn Oregon coast, and up to 20 kt along the
coast of Vancouver Island though none are in the strongest 
gradient. The 06Z GFS winds are well initialized when compared 
with the data, and indicate the winds will continue at current 
peak intensities near the diurnal max into Sun night. The GFS 
indicates that the higher winds will be disrupted Mon night into 
Thu as the aforementioned shortwave moves over the top of the 
ridge and then digs S along the coast while forcing a weak low at
the surface. This coincides with the ridge shifting off to the 
W, effectively causing the pressure gradient to weaken just 
offshore. The GFS then indicates the shortwave will pass well 
inland by late Thu, allowing the coastal trough to intensify as 
the ridge builds back toward the E. The model hints at gales on 
Thu night in the coastal waters, but confidence is low as the 
rest of the 00Z guidance is weaker. Otherwise, the models agree 
well throughout the forecast period with only minor differences 
in the offshore waters, so planning on staying near continuity in
the update package since the 06Z guidance generally supports the
previous grids.

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

There was a ASCAT pass at about 0430Z with a swath across much of
the WA/OR waters and ern areas of the CA offshore waters. The 
strongest winds where data was available was 30 kt along the far 
SE OR and ern nrn CA.

High pressure early this morning was centered to the W of the 
WA/OR waters while a trof was inland over CA. Another trof was
along Vancouver island. Winds were to 20 or 25 kt over the nrn WA
waters. Model guidance has the trof along the nrn CA coast 
persisting today through early Mon, then becoming weaker later 
Mon and Mon night. The area of high pressure over the area 
gradually weakens the winds over the nrn offshore waters later 
Wed and Wed night. A weakening cold moves over the WA/OR waters 
Wed and Wed night. High pressure rebuilds in from the W over the 
WA/OR waters Wed night. As has been the case the past several 
days plan to continue to use the GFS for grids.

Seas...At 06Z highest seas continue to be along the OR and nrn 
CA waters where max seas were to 11 ft. The WWII and ECMWF wam 
were in close agreement to observed seas at 06Z. Plan to use the 
ECMWF wam for the grids throughout the forecast period.

.EXTRATROPICAL STORM SURGE GUIDANCE...n/a.

.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
     None.

.PZ6 California Waters...
     None.

$$

.Forecaster Kells/Rowland. Ocean Prediction Center.
Last Update:15:06Z, 18 August 2018
Updates: Four times per day

FZPN25 KWBC 181601
OFFPZ5

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
901 AM PDT Sat Aug 18 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.

PZZ898-190515-
901 AM PDT Sat Aug 18 2018

.SYNOPSIS FOR WASHINGTON AND OREGON WATERS...An area of high 
pressure will persist to the W and NW of the waters today through 
Sun night, then weaken Mon and Mon night while shifting to the 
SW. A low pressure trough will expand N along the Oregon and 
Washington coasts today, then persist through Sun night before 
weakening Mon into Tue. A second low pressure trough will 
continue over Vancounver Island today into Wed, then weaken Wed 
night. A weakening cold front will move E over the waters Tue 
night and Wed. A high pressure ridge will build E across the 
region Wed and Wed night.


$$

PZZ800-190515-
Cape Flattery to Cape Shoalwater between 60 nm and 150 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N to NW winds 15 to 25 kt. Seas 6 to 8 ft.
.TONIGHT...NW winds 20 to 30 kt. Seas 6 to 10 ft.
.SUN...N to NW winds 15 to 25 kt. Seas 7 to 10 ft.
.SUN NIGHT...NW winds 15 to 25 kt. Seas 6 to 10 ft.
.MON...N to NW winds 10 to 20 kt, becoming N 5 to 15 kt. Seas 6 to 9
ft.
.MON NIGHT...NW winds 10 to 15 kt, becoming 10 to 20 kt. Seas
subsiding to 5 to 7 ft.
.TUE...N to NW winds 10 to 20 kt. Seas 5 to 7 ft.
.TUE NIGHT...NW winds 15 to 25 kt. Seas 5 to 9 ft.
.WED...NW winds 15 to 25 kt. Seas 6 to 9 ft.
.WED NIGHT...NW winds 15 to 20 kt. Seas 7 to 9 ft.

$$

PZZ900-190515-
Cape Flattery to Cape Shoalwater between 150 nm and 250 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N to NW winds 15 to 25 kt. Seas 6 to 8 ft.
.TONIGHT...N to NW winds 20 to 30 kt. Seas 6 to 9 ft.
.SUN...N to NW winds 20 to 25 kt. Seas 7 to 9 ft.
.SUN NIGHT...N to NW winds 20 to 25 kt. Seas 8 to 10 ft.
.MON...N winds 15 to 25 kt. Seas 7 to 9 ft.
.MON NIGHT...N winds 15 to 20 kt. Seas 6 to 9 ft.
.TUE...N to NW winds 15 to 20 kt. Seas 6 to 8 ft.
.TUE NIGHT...N to NW winds 15 to 25 kt. Seas 6 to 8 ft.
.WED...NW winds 15 to 25 kt. Seas 5 to 9 ft.
.WED NIGHT...NW winds 10 to 20 kt. Seas 5 to 8 ft.

$$

PZZ805-190515-
Cape Shoalwater to Cape Lookout between 60 nm and 150 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 20 kt. Seas 6 to 7 ft.
.TONIGHT...N to NW winds 15 to 20 kt. Seas 6 to 8 ft.
.SUN...N to NW winds 15 to 25 kt. Seas 7 to 9 ft.
.SUN NIGHT...N winds 15 to 25 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 10 to 15 kt. Seas 5 to 7 ft.
.TUE...N winds 10 to 15 kt, becoming 10 to 20 kt. Seas 5 to 6 ft.
.TUE NIGHT...N to NW winds 15 to 20 kt. Seas 5 to 7 ft.
.WED...N to NW winds 10 to 20 kt. Seas building to 6 to 9 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 7 to 9 ft.

$$

PZZ905-190515-
Cape Shoalwater to Cape Lookout between 150 nm and 250 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 20 kt. Seas 6 to 7 ft.
.TONIGHT...N winds 15 to 20 kt. Seas 6 to 8 ft.
.SUN...N to NW winds 20 to 25 kt. Seas 7 to 9 ft.
.SUN NIGHT...N winds 20 to 25 kt. Seas 8 to 10 ft.
.MON...N winds 15 to 25 kt. Seas 7 to 9 ft.
.MON NIGHT...N winds 15 to 20 kt. Seas 6 to 9 ft.
.TUE...N winds 15 to 20 kt. Seas 6 to 8 ft.
.TUE NIGHT...N winds 15 to 20 kt. Seas 6 to 7 ft.
.WED...N to NW winds 10 to 20 kt. Seas 6 to 9 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 5 to 9 ft.

$$

PZZ810-190515-
Cape Lookout to Florence, OR between 60 nm and 150 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 20 kt. Seas 6 to 7 ft.
.TONIGHT...N winds 15 to 20 kt. Seas 6 to 8 ft.
.SUN...N winds 15 to 20 kt. Seas 7 to 9 ft.
.SUN NIGHT...N winds 15 to 25 kt. Seas 7 to 10 ft.
.MON...N winds 10 to 20 kt, becoming 10 to 15 kt. Seas subsiding to
6 to 8 ft.
.MON NIGHT...N winds 15 to 20 kt, diminishing to 10 to 15 kt. Seas 6
to 7 ft.
.TUE...N winds 15 to 20 kt. Seas 5 to 6 ft.
.TUE NIGHT...N winds 10 to 20 kt. Seas 6 to 7 ft.
.WED...N winds 10 to 20 kt, becoming 10 to 15 kt. Seas 6 to 8 ft.
.WED NIGHT...N winds 10 to 15 kt. Seas 6 to 8 ft.

$$

PZZ910-190515-
Cape Lookout to Florence, OR between 150 nm and 250 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 20 kt. Seas 6 to 7 ft.
.TONIGHT...N winds 15 to 20 kt. Seas 6 to 8 ft.
.SUN...N winds 15 to 20 kt. Seas 7 to 9 ft.
.SUN NIGHT...N winds 15 to 25 kt. Seas 8 to 10 ft.
.MON...N winds 15 to 20 kt. Seas 7 to 9 ft.
.MON NIGHT through TUE NIGHT...N winds 15 to 20 kt. Seas 6 to 8 ft.
.WED...N to NW winds 10 to 20 kt. Seas 7 to 8 ft.
.WED NIGHT...N to NW winds 10 to 15 kt. Seas 6 to 8 ft.

$$

PZZ815-190515-
Florence, OR to Point St. George between 60 nm and 150 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 25 kt. Seas 6 to 10 ft.
.TONIGHT...N winds 15 to 25 kt. Seas 6 to 9 ft.
.SUN...N winds 15 to 25 kt. Seas 7 to 9 ft.
.SUN NIGHT...N winds 15 to 25 kt. Seas 7 to 10 ft.
.MON...N winds 15 to 20 kt. Seas 6 to 10 ft.
.MON NIGHT...N winds 15 to 20 kt. Seas 6 to 8 ft.
.TUE...N winds 10 to 20 kt. Seas 6 to 7 ft.
.TUE NIGHT...N winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas 6
to 7 ft.
.WED...N winds 5 to 15 kt. Seas 5 to 7 ft.
.WED NIGHT...N winds 5 to 15 kt. Seas 5 to 8 ft.

$$

PZZ915-190515-
Florence, OR to Point St. George between 150 nm and 250 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 20 kt. Seas 6 to 9 ft.
.TONIGHT...N winds 15 to 20 kt. Seas 6 to 8 ft.
.SUN...N winds 15 to 20 kt. Seas 6 to 9 ft.
.SUN NIGHT...N winds 15 to 25 kt. Seas 7 to 10 ft.
.MON...N winds 15 to 20 kt. Seas 7 to 10 ft.
.MON NIGHT...N winds 15 to 20 kt. Seas subsiding to 6 to 8 ft.
.TUE...N winds 15 to 20 kt. Seas 6 to 8 ft.
.TUE NIGHT and WED...N winds 10 to 20 kt. Seas 6 to 8 ft.
.WED NIGHT...N winds 10 to 15 kt. Seas 6 to 8 ft.

$$

.Forecaster Kells. Ocean Prediction Center.
Last Update:16:02Z, 18 August 2018
Updates: Four times per day

FZPN26 KWBC 181601
OFFPZ6

Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
901 AM PDT Sat Aug 18 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.

PZZ899-190515-
901 AM PDT Sat Aug 18 2018

.SYNOPSIS FOR CALIFORNIA WATERS...A low pressure trough will 
intensify near the northern California coast today, then persist
through early Mon before weakening late Mon into Tue. As area of
high pressure will persist to the W and NW of the waters today 
into Mon night, then shift W of the region Tue through Wed night 
while weakening. A high pressure ridge will build N of the waters
Wed and Wed night.

$$

PZZ820-190515-
Point St. George to Point Arena between 60 nm and 150 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 25 kt. Seas 8 to 11 ft.
.TONIGHT...N winds 20 to 25 kt. Seas 8 to 10 ft.
.SUN and SUN NIGHT...N winds 20 to 25 kt. Seas 8 to 11 ft.
.MON...N winds 20 to 25 kt. Seas 7 to 12 ft.
.MON NIGHT...N to NW winds 15 to 20 kt, becoming NW 10 to 15 kt.
Seas becoming 7 to 9 ft.
.TUE...N to NW winds 5 to 15 kt. Seas subsiding to 6 to 7 ft.
.TUE NIGHT...N to NW winds 5 to 15 kt, becoming variable. Seas 5 to
7 ft.
.WED...Variable winds 5 to 15 kt, becoming N. Seas 5 to 6 ft.
.WED NIGHT...N winds 10 to 20 kt. Seas 5 to 7 ft.

$$

PZZ920-190515-
Point St. George to Point Arena between 150 nm and 250 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 15 to 25 kt. Seas 6 to 10 ft.
.TONIGHT...N winds 15 to 20 kt. Seas 6 to 9 ft.
.SUN...N winds 15 to 25 kt. Seas 6 to 9 ft.
.SUN NIGHT...N winds 20 to 25 kt. Seas 7 to 10 ft.
.MON...N winds 20 to 25 kt. Seas 8 to 10 ft.
.MON NIGHT...N winds 15 to 20 kt. Seas subsiding to 7 to 8 ft.
.TUE...N winds 10 to 20 kt, becoming 10 to 15 kt. Seas 6 to 8 ft.
.TUE NIGHT and WED...N winds 10 to 20 kt. Seas 6 to 7 ft.
.WED NIGHT...N winds 10 to 20 kt. Seas 5 to 7 ft.

$$

PZZ825-190515-
Point Arena to Pigeon Point between 60 nm and 150 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N winds 10 to 20 kt. Seas 7 to 9 ft.
.TONIGHT...N winds 10 to 20 kt. Seas 6 to 10 ft.
.SUN...N winds 15 to 25 kt. Seas 7 to 11 ft.
.SUN NIGHT...N winds 20 to 25 kt. Seas 7 to 11 ft.
.MON...N winds 20 to 25 kt, becoming NW 15 to 20 kt. Seas 7 to 11
ft.
.MON NIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt. Seas
7 to 9 ft.
.TUE...NW winds 10 to 15 kt, becoming W to NW 5 to 10 kt. Seas
subsiding to 5 to 7 ft.
.TUE NIGHT and WED...W winds 5 to 10 kt. Seas 5 to 6 ft.
.WED NIGHT...W winds 5 to 10 kt, becoming N to NW 5 to 15 kt. Seas 5
to 6 ft.

$$

PZZ925-190515-
Point Arena to Pigeon Point between 150 nm and 250 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY through SUN...N winds 15 to 20 kt. Seas 7 to 9 ft.
.SUN NIGHT...N winds 15 to 25 kt. Seas 7 to 9 ft.
.MON...N winds 15 to 25 kt. Seas 8 to 10 ft.
.MON NIGHT...N to NW winds 15 to 20 kt, diminishing to 10 to 15 kt.
Seas subsiding to 7 to 8 ft.
.TUE...NW winds 10 to 15 kt, diminishing to 5 to 10 kt. Seas 6 to 8
ft.
.TUE NIGHT...W to NW winds 5 to 10 kt. Seas 6 to 7 ft.
.WED...N to NW winds 5 to 15 kt. Seas 5 to 7 ft.
.WED NIGHT...N to NW winds 5 to 15 kt, becoming N 10 to 20 kt. Seas
5 to 6 ft.

$$

PZZ830-190515-
Pigeon Point to Point Piedras Blancas between 60 nm and 150 nm
offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N to NW winds 5 to 15 kt. Seas 5 to 8 ft.
.TONIGHT...N to NW winds 10 to 15 kt. Seas 6 to 8 ft.
.SUN...N to NW winds 10 to 20 kt. Seas 6 to 8 ft.
.SUN NIGHT...N to NW winds 15 to 20 kt. Seas building to 7 to 10 ft.
.MON...N to NW winds 15 to 20 kt. Seas 7 to 10 ft.
.MON NIGHT...NW winds 10 to 15 kt. Seas subsiding to 6 to 8 ft.
.TUE...NW winds 5 to 10 kt. Seas 5 to 7 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Seas 5 to 6 ft.
.WED...NW winds 5 to 10 kt, becoming W to NW 5 to 15 kt. Seas 5 to 6
ft.
.WED NIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt. Seas 5
to 6 ft.

$$

PZZ930-190515-
Pigeon Point to Point Piedras Blancas between 150 nm and 250 nm
offshore-
901 AM PDT Sat Aug 18 2018

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

$$

PZZ835-190515-
Point Piedras Blancas to Santa Cruz Island, CA between 60 nm and
150 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...NW winds 5 to 10 kt. Seas 5 to 7 ft. Areas of fog with VSBY
1 nm or less.
.TONIGHT...NW winds 10 to 15 kt. Seas 6 to 7 ft.
.SUN...NW winds 10 to 15 kt. Seas 5 to 7 ft.
.SUN NIGHT...N to NW winds 15 to 20 kt. Seas 6 to 7 ft.
.MON...NW winds 15 to 20 kt, diminishing to 10 to 15 kt. Seas 6 to 8
ft.
.MON NIGHT...NW winds 10 to 15 kt. Seas 6 to 8 ft.
.TUE...NW winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE NIGHT and WED...NW winds 10 to 15 kt. Seas 5 to 6 ft.
.WED NIGHT...NW winds 10 to 20 kt, becoming 10 to 15 kt. Seas 5 to 6
ft.

$$

PZZ935-190515-
Point Piedras Blancas to Santa Cruz Island, CA between 150 nm
and 250 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...N to NW winds 5 to 15 kt. Seas 6 to 7 ft. Areas of fog with
VSBY 1 nm or less.
.TONIGHT...N to NW winds 5 to 15 kt. Seas 6 to 7 ft.
.SUN...N to NW winds 10 to 15 kt. Seas 6 to 7 ft.
.SUN NIGHT...N winds 10 to 20 kt. Seas 6 to 7 ft.
.MON...N winds 15 to 20 kt. Seas 6 to 8 ft.
.MON NIGHT...N to NW winds 10 to 15 kt. Seas 7 to 8 ft.
.TUE...N to NW winds 5 to 10 kt. Seas 6 to 7 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Seas 5 to 6 ft.
.WED...NW winds 5 to 15 kt. Seas 5 to 6 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 5 to 6 ft.

$$

PZZ840-190515-
Santa Cruz Island, CA to San Clemente Island, CA between 60 nm
and 150 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...W winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 4 to 6
ft. Areas of fog with VSBY 1 nm or less.
.TONIGHT...W to NW winds 10 to 15 kt. Seas 4 to 6 ft. Areas of fog
with VSBY 1 nm or less.
.SUN...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.SUN NIGHT...NW winds 10 to 20 kt. Seas 4 to 7 ft.
.MON...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.MON NIGHT...NW winds 10 to 15 kt. Seas 4 to 7 ft.
.TUE...NW winds 5 to 15 kt. Seas 4 to 7 ft.
.TUE NIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.WED and WED NIGHT...NW winds 10 to 20 kt. Seas 4 to 6 ft.

$$

PZZ940-190515-
Santa Cruz Island, CA to 120W between 150 nm and 250 nm offshore-
901 AM PDT Sat Aug 18 2018

.TODAY...W to NW winds 5 to 10 kt. Seas 5 to 6 ft. Areas of fog with
VSBY 1 nm or less.
.TONIGHT...NW winds 5 to 10 kt, becoming 5 to 15 kt. Seas 5 to 6 ft.
.SUN...NW winds 10 to 15 kt. Seas 5 to 6 ft.
.SUN NIGHT and MON...NW winds 10 to 15 kt. Seas 5 to 7 ft.
.MON NIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt. Seas 5
to 7 ft.
.TUE...N to NW winds 5 to 10 kt. Seas 5 to 7 ft.
.TUE NIGHT and WED...N to NW winds 10 to 15 kt. Seas 5 to 6 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 5 to 6 ft.

$$

PZZ945-190515-
San Clemente Island, CA to Guadalupe Island from 60 nm offshore
west to 120W-
901 AM PDT Sat Aug 18 2018

.TODAY...NW winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 4 to 6
ft.
.TONIGHT through MON...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.MON NIGHT and TUE...NW winds 5 to 10 kt. Seas 4 to 6 ft.
.TUE NIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.WED...NW winds 10 to 15 kt. Seas 4 to 5 ft.
.WED NIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft.

$$

.Forecaster Kells. Ocean Prediction Center.
Last Update:16:02Z, 18 August 2018
Updates: Four times per day

FZPN01 KWBC 181544
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1630 UTC SAT AUG 18 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). 

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

PAN PAN 

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

SYNOPSIS VALID 1200 UTC AUG 18. 
24 HOUR FORECAST VALID 1200 UTC AUG 19. 
48 HOUR FORECAST VALID 1200 UTC AUG 20. 

.WARNINGS. 

...STORM WARNING... 
.LOW 49N160W 981 MB MOVING NW 10 KT WILL TURN SE AFTER 24 HOURS. 
WITHIN 300 NM W SEMICIRCLE AND 180 NM E OF A LINE FROM 52N155W 
TO 44N152W WINDS 35 TO 50 KT. SEAS 12 TO 23 FT. ELSEWHERE WITHIN 
540 NM W SEMICIRCLE...660 NM NE AND 900 NM SE QUADRANTS WINDS 25 
TO 40 KT. SEAS 9 TO 17 FT. 
.24 HOUR FORECAST LOW 50N163W 987 MB. FRONT TO EXTEND FROM 
58N154W TO 50N147W TO 42N148W TO 39N151W. WITHIN 360 NM NE...480 
NM SE...540 NM SW...AND 420 NM NW QUADRANTS...ALSO WITHIN 180 NM 
NE AND E OF THE FRONT WINDS 25 TO 40 KT. SEAS 9 TO 21 
FT...HIGHEST SW. ELSEWHERE FROM 36N TO 60N BETWEEN 141W AND 175W 
WINDS TO 25 KT. SEAS 8 TO 12 FT.   
.48 HOUR FORECAST LOW 49N158W 999 MB. WITHIN 420 NM S AND SE 
SEMICIRCLES...AND WITHIN 240 NM E OF A LINE FROM 61N147W TO 
44N147W TO 40N149W WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.  

...GALE WARNING... 
.LOW W OF AREA 42N159E 1004 MB MOVING N 30 KT. OVER FORECAST 
WATERS WITHIN 300 NM SE QUADRANT WINDS 25 TO 35 KT. SEAS 8 TO 13 
FT. ELSEWHERE W OF A LINE FROM 54N172E TO 34N164E WINDS 20 TO 30 
KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW W OF AREA 53N159E 987 MB. WITHIN 480 NM SE 
QUADRANT WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE WITHIN 
720 NM E QUADRANT WINDS 20 TO 30 KT. SEAS TO 10 FT.  
.48 HOUR FORECAST LOW W OF AREA 56N165E 985 MB. WITHIN 420 NM SE 
AND 600 NM S QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 17 FT. 

.SYNOPSIS AND FORECAST. 

.OVER FORECAST WATERS FROM 38N TO 44N BETWEEN 124W AND 129W AREA 
OF N WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 
.24 HOUR FORECAST FROM 37N TO 44N BETWEEN 124W AND 130W N WINDS 
20 TO 30 KT. SEAS TO 10 FT. 
.48 HOUR FORECAST FROM 35N TO 43N BETWEEN 123W AND 131W N WINDS 
20 TO 30 KT. SEAS TO 11 FT. 

.OVER FORECAST WATERS FROM 47N TO 50N BETWEEN 126W AND 129W AREA 
OF N TO NW WINDS TO 25 KT. SEAS TO 8 FT. 
.24 HOUR FORECAST FROM 45N TO 53N BETWEEN 126W AND 132W N TO NW 
WINDS 20 TO 30 KT. SEAS TO 10 FT. 
.48 HOUR FORECAST FROM 43N TO 54N BETWEEN 127W AND 133W N TO NW 
WINDS 20 TO 30 KT. SEAS TO 10 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM BETWEEN 160E AND A 
LINE FROM 54N169E TO 40N175E...AND WITHIN THE AREA BOUNDED BY A 
LINE FROM 52N161W TO 45N149W TO 54N141W TO 56N154W TO 52N161W. 
.24 HOUR FORECAST DENSE FOG FROM 40N TO 56N BETWEEN 170E AND 
176E...AND WITHIN 180 NM NE OF A LINE FROM 57N152W TO 49N145W.
.48 HOUR FORECAST DENSE FOG FROM 44N TO 59N BETWEEN 142W AND 
148W.  

.HIGH 47N135W 1032 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE. 
.48 HOUR FORECAST HIGH 46N137W 1030 MB. 

.HIGH 57N137W 1029 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE. 

.HIGH 52N178E 1028 MB MOVING SE 30 KT. 
.24 HOUR FORECAST HIGH 39N178W 1025 MB. 
.48 HOUR FORECAST HIGH 36N174W 1025 MB. 

.HIGH 35N175E 1025 MB NEARLY STATIONARY. 
.24 HOUR FORECAST LITTLE CHANGE. 
.48 HOUR FORECAST HIGH 35N177E 1025 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 SAT AUG 18.
24 HOUR FORECAST VALID 1200 UTC SUN AUG 19.
48 HOUR FORECAST VALID 1200 UTC MON AUG 20.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE LANE NEAR 12.3N 138.2W 948 MB AT 1500 UTC AUG 18 
MOVING WNW OR 285 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 120 KT 
GUSTS 145 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM NE 
QUADRANT...70 NM SE QUADRANT...40 NM SW QUADRANT...AND 60 NM NW 
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 210 NM E SEMICIRCLE...90 
NM SW QUADRANT AND 120 NM NW QUADRANT WITH SEAS TO 43 FT. 
ELSEWHERE WITHIN 150 NM NE AND 120 NM SW SEMICIRCLES WINDS 20 TO 
33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA FROM 09N TO 17N W OF 
133W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE LANE W OF AREA NEAR 13.4N 142.3W. 
MAXIMUM SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM 
FORCE WINDS WITHIN 110 NM NE QUADRANT...100 NM SE QUADRANT...60 
NM SW QUADRANT...AND 90 NM NW QUADRANT. OVER FORECAST 
WATERS...SEAS 12 FT OR GREATER FROM 12N TO 17N BETWEEN 139W AND 
140W WITH SEAS TO 13 FT. ELSEWHERE FROM 11N TO 17N BETWEEN 138W 
AND 140W E TO SE WINDS 20 TO 25 KT. SEAS 8 TO 12 FT. REMAINDER 
OF AREA FROM 11N TO 20N W OF 136W WINDS 20 KT OR LESS. SEAS 8 TO 
11 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE LANE WEST OF AREA NEAR 14.1N 146.3W. 
MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 KT. LITTLE CHANGE IN 
RADIUS OF TROPICAL STORM FORCE WINDS. OVER FORECAST WATERS WINDS 
20 KT OR LESS. SEAS LESS THAN 8 FT.
.72 HOUR FORECAST HURRICANE LANE NEAR 14.5N 150.1W. MAXIMUM 
SUSTAINED WINDS 95 KT GUSTS 115 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE LANE NEAR 14.9N 153.5W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT.
.120 HOUR FORECAST HURRICANE LANE NEAR 15.8N 157.0W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

.SYNOPSIS AND FORECAST.

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

CONVECTION VALID AT 1500 UTC SAT AUG 18...

.HURRICANE LANE...NUMEROUS MODERATE SCATTERED STRONG WITHIN 60 
NM OF CENTER. SCATTERED MODERATE ISOLATED STRONG ELSEWHERE FROM 
08N TO 15N BETWEEN 134W AND 140W.

.TROPICAL WAVE AXIS NEAR 106W FROM 04N TO 17N...SCATTERED 
MODERATE ISOLATED STRONG FROM 10N TO 14N BETWEEN 101W AND 106W 
AND FROM 12N TO 16N BETWEEN 96W AND 101W.

.TROPICAL WAVE AXIS NEAR 119W FROM 05N TO 16N...SCATTERED 
MODERATE ISOLATED STRONG FROM 12N TO 15N BETWEEN 113W AND 119W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 08N78W TO 07N83W TO 09N90W TO 08N96W TO 
11N114W TO 10N121W. ITCZ FROM 10N121W TO 09N124W TO 11N130W. 
SCATTERED MODERATE AND ISOLATED STRONG FROM 03N TO 08N E OF 81W. 
SCATTERED MODERATE ISOLATED STRONG FROM 08N TO 10N BETWEEN 85W 
AND 91W. 

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.
Last Update:15:46Z, 18 August 2018
Updates: Four times per day