High Seas Forecast
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
000
FZPN01 KWBC 230935
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC SAT SEP 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

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

SYNOPSIS VALID 0600 UTC SEP 23.
24 HOUR FORECAST VALID 0600 UTC SEP 24.
48 HOUR FORECAST VALID 0600 UTC SEP 25.

.WARNINGS.

...GALE WARNING...
.LOW 41N178E 1000 MB MOVING E 15 KT. OVER FORECAST WATERS WITHIN
420 NM N AND 540 NM S SEMICIRCLES WINDS 25 TO 35 KT. SEAS TO 10
FT. ELSEWHERE FROM 34N TO 44N W OF 170E WINDS TO 25 KT. SEAS TO
10 FT.
.24 HOUR FORECAST LOW 42N171W 1000 MB. WITHIN 480 NM W
SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 12 FT. ELSEWHERE WITHIN
240 NM N AND NE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW 44N162W 998 MB. WITHIN 420 NM NW AND 600
NM SE SEMICIRCLES WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.

...GALE WARNING...
.LOW 41N165W 1008 MB MOVING NE 25 KT. WITHIN 300 NM SE
SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 47N150W 1004 MB. WITHIN 360 NM SE OF A
FRONT TO EXTEND FROM 40N165W TO LOW CENTER TO 55N135W WINDS 25
TO 35 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW 52N134W 1003 MB. OVER FORECAST WATERS
WITHIN 300 NM E QUADRANT WINDS 25 TO 35 KT. SEAS TO 12 FT.
ELSEWHERE WITHIN 600 NM S AND 240 NM W QUADRANTS WINDS 20 TO 30
KT. SEAS 8 TO 13 FT.

...GALE WARNING...
.LOW 54N159W 997 MB MOVING NE 15 KT. OVER FORECAST WATERS WITHIN
480 NM S AND 600 NM W QUADRANTS WINDS 20 TO 30 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 57N151W 992 MB. WITHIN 300 NM S QUADRANT
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT. ELSEWHERE WITHIN 300 NM
E...360 NM S...AND 720 NM W QUADRANTS WINDS 20 TO 30 KT. SEAS TO
9 FT.
.48 HOUR FORECAST LOW 59N146W 1004 MB. WITHIN 240 NM OF LOW
CENTER WINDS TO 25 KT. SEAS TO 9 FT.

...GALE WARNING...
.48 HOUR FORECAST OVER FORECAST WATERS FROM 30N TO 41N W OF 174E
WINDS 25 TO 35 KT. SEAS TO 12 FT.

.SYNOPSIS AND FORECAST.

.OVER FORECAST WATERS E OF A LINE FROM 42N129W TO 31N128W WINDS
TO 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST E OF A LINE FROM 43N129W TO 32N129W WINDS 20
TO 30 KT. SEAS TO 10 FT.
.48 HOUR FORECAST E OF A LINE FROM 42N129W TO 31N129W WINDS 20
TO 30 KT. SEAS TO 11 FT.

.WITHIN 360 NM S AND SE OF A FRONT FROM 54N141W TO 50N150W TO
37N162W WINDS 20 TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST CONDITIONS ABSORBED AND CONDITIONS DESCRIBED
ABOVE WITH LOW 47N150W.

.48 HOUR FORECAST LOW 57N164W 996 MB. OVER FORECAST WATERS
WITHIN 240 NM E SEMICIRCLE AND WITHIN 360 NM NE AND E OF A LINE
FROM 63N174W TO 53N174W WINDS 20 TO 30 KT. SEAS TO 11 FT.

.BOGOSLOF VOLCANO AT 53.92N 168.03W IS CURRENTLY IN A HEIGHTENED
STATE OF UNREST. MARINERS TRAVELING IN THE VICINITY OF BOGOSLOF
VOLCANO ARE URGED TO EXERCISE CAUTION. IF MARINERS ENCOUNTER ANY
VOLCANIC ASH...REPORT THE OBSERVATION TO THE OCEAN PREDICTION
CENTER BY CALLING 301-683-1520.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN AN AREA
BOUNDED BY A LINE FROM 38N160W TO 50N141W TO 57N154W TO 48N153W
TO 41N163W TO 38N160W.
.24 HOUR FORECAST DENSE FOG WITHIN 240 NM NW OF A LINE FROM
47N141W TO 38N161W.
.48 HOUR FORECAST DENSE FOG WITHIN 300 NM N OF A LINE FROM
41N155W TO 44N143W...AND WITHIN 60 NM OF 47N136W.

.HIGH 41N140W 1027 MB MOVING E 10 KT.
.24 HOUR FORECAST HIGH 40N135W 1026 MB.
.48 HOUR FORECAST HIGH 37N137W 1026 MB.

.HIGH 55N174E 1023 MB MOVING S 15 KT.
.24 HOUR FORECAST HIGH 51N174E 1022 MB.
.48 HOUR FORECAST HIGH MERGED WITH HIGH 48N170E BELOW.

.24 HOUR FORECAST HIGH 47N165E 1025 MB.
.48 HOUR FORECAST HIGH 48N170E 1027 MB.

.FORECASTER SOMMERVILLE. 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 SAT SEP 23.
24 HOUR FORECAST VALID 0600 UTC SUN SEP 24.
48 HOUR FORECAST VALID 0600 UTC MON SEP 25.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 17.5N104.5W 1007 MB. WITHIN 120 NM S SEMICIRCLE
WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
19N106W 1005 MB. WITHIN 90 NM SE AND 60 NM NW SEMICIRCLES WINDS
20 TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
19.5N106.5W 1004 MB. WITHIN 90 NM SE AND 60 NM NW SEMICIRCLES
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.

.FROM 11N TO 12N BETWEEN 105W AND 108W AND FROM 10N TO 12N
BETWEEN 113W AND 118W SW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
ELSEWHERE FROM 09N TO 14N BETWEEN 103W AND 123W WINDS 20 KT OR
LESS. SEAS 8 TO 10 FT IN MIXED SE SWELL AND S WIND WAVES.
.24 HOUR FORECAST FROM 10N TO 12N BETWEEN 102W AND 111W SW TO W
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE FROM 08.5N TO 14N
BETWEEN 100W AND 118W WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED
SE SWELL AND S WIND WAVES.
.48 HOUR FORECAST FROM 09.5N TO 11N BETWEEN 104W AND 108W SW TO
W WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE FROM 08.5N TO 13N
BETWEEN 93W AND 113W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN
MIXED SWELL.

.FROM 17N TO 21N BETWEEN 115W AND 118W WINDS 20 KT OR LESS. SEAS
8 FT IN MIXED NW AND NE SWELL.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.N OF 28N BETWEEN 116W AND 123W WINDS 20 KT OR LESS. SEAS TO 8
FT IN NW SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.S OF 02N BETWEEN 84W AND 96W WINDS 20 KT OR LESS. SEAS TO 9 FT
IN SE SWELL.
.12 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 0830 UTC SAT SEP 23...

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH FROM 10N74W TO 11N77W TO 09N84W TO 16N95W TO LOW
PRES 1007 MB NEAR 18N105W TO 12N126W TO LOW PRES 1011 MB NEAR
14N137W TO BEYOND 11N140W. SCATTERED MODERATE ISOLATED STRONG
ALONG AND UP TO 180 NM SW OF TROUGH AXIS BETWEEN 90W AND 96W AND
FROM 10N TO 12N BETWEEN 129W AND 134W. SCATTERED MODERATE WITHIN
90 NM EITHER SIDE OF LINE FROM 13N98W TO 11N120W.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.