High Seas Forecast
Issued by NWS

Home | 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 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
513
FZPN01 KWBC 250943
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC MON SEP 25 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 25.
24 HOUR FORECAST VALID 0600 UTC SEP 26.
48 HOUR FORECAST VALID 0600 UTC SEP 27.

.WARNINGS.

...STORM WARNING...
.LOW 36N164E 1000 MB MOVING E 15 KT. OVER FORECAST WATERS WITHIN
240 NM N SEMICIRCLE WINDS 40 TO 50 KT. SEAS 12 TO 17 FT.
ELSEWHERE WITHIN 480 NM N AND 420 NM S SEMICIRCLES WINDS 25 TO
40 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 36N170E 1004 MB. WITHIN 420 NM NW...480 NM
NE...540 NM SE...AND 660 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS
8 TO 15 FT.
.48 HOUR FORECAST LOW 38N177E 1000 MB. WITHIN 420 NM W...300 NM
N...360 NM S...AND 240 NM E QUADRANTS WINDS 35 TO 45 KT. SEAS 11
TO 17 FT. ELSEWHERE FROM 30N TO 44N W OF 174W WINDS 25 TO 35 KT.
SEAS 8 TO 14 FT.

...GALE WARNING...
.LOW 46N160W 999 MB MOVING NE 20 KT. WITHIN 420 NM NW AND 720 NM
SE SEMICIRCLES WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW 52N152W 994 MB. OVER FORECAST WATERS
WITHIN 360 NM NW...600 NM NE...660 NM SE...AND 540 NM SW
QUADRANTS AND WITHIN 420 NM SE OF A FRONT TO EXTEND FROM 46N149W
TO 31N159W WINDS 25 TO 35 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW 55N154W 990 MB WITH A SECOND LOW TO FORM
44N143W 1008 MB. WITHIN 360 NM NW QUADRANT OF FIRST LOW AND
WITHIN 360 NM SE AND E OF A FRONT TO EXTEND FROM 54N141W TO
SECOND LOW TO 35N150W WINDS 25 TO 35 KT. SEAS TO 12 FT.
ELSEWHERE WITHIN 840 NM SW...300 NM NW...660 NM NE...AND 780 NM
SE QUADRANTS OF FIRST LOW WINDS TO 25 KT. SEAS TO 9 FT.

.SYNOPSIS AND FORECAST.

.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.

.LOW 52N133W 1008 MB MOVING NE 10 KT. OVER FORECAST WATERS
WITHIN 420 NM SE SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.LOW 57N162W 1000 MB MOVING S 10 KT. OVER FORECAST WATERS WITHIN
240 NM S SEMICIRCLE AND WITHIN 240 NM NW AND W OF A LINE FROM
64N165W TO 57N168W WINDS 20 TO 30 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW 53N163W 1004 MB. WITHIN 300 NM W AND NW OF
A LINE FROM 63N161W TO 56N170W TO 51N165W WINDS TO 25 KT. SEAS
TO 8 FT.
.48 HOUR FORECAST LOW ABSORBED AND CONDITIONS DESCRIBED ABOVE
WITH LOW 55N154W.

.OVER FORECAST WATERS WITHIN 300 NM E OF A LINE FROM 43N128W TO
31N130W WINDS 20 TO 30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST WITHIN 300 NM E OF A LINE FROM 43N130W TO
31N130W WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST WITHIN 300 NM E OF A LINE FROM 45N129W TO
32N130W WINDS 20 TO 30 KT. SEAS TO 9 FT.

.48 HOUR FORECAST OVER FORECAST WATERS FROM 44N TO 55N W OF 163E
WINDS TO 25 KT. SEAS LESS THAN 8 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 480 NM N OF
A LINE FROM 39N159W TO 46N136W.
.24 HOUR FORECAST DENSE FOG FROM 43N TO 54N BETWEEN 154W AND
136W.
.48 HOUR FORECAST DENSE FOG WITHIN 60 NM OF 50N139W...WITHIN 60
NM OF 55N138W...AND WITHIN 60 NM OF 56N152W.

.HIGH 54N142W 1016 MB MOVING NE 15 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 38N137W 1026 MB MOVING NE 05 KT.
.24 HOUR FORECAST HIGH 40N135W 1025 MB.
.48 HOUR FORECAST HIGH 42N133W 1022 MB.

.HIGH 49N169E 1026 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH 51N171E 1025 MB.

.24 HOUR FORECAST NEW HIGH 34N170W 1017 MB.
.48 HOUR FORECAST HIGH 36N163W 1019 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 MON SEP 25.
24 HOUR FORECAST VALID 0600 UTC TUE SEP 26.
48 HOUR FORECAST VALID 0600 UTC WED SEP 27.

.WARNINGS.

...TROPICAL STORM WARNING...

.TROPICAL STORM PILAR NEAR 22.2N 106.6W 1004 MB AT 0900 UTC SEP
25 MOVING NNW OR 340 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N
SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS TO 11 FT WITHIN 30 NM N
SEMICIRCLE. ELSEWHERE WITHIN 75 NM OF CENTER EXCEPT 60 NM SE
QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 10 FT. REMAINDER OF AREA
FROM 20N TO 23N E OF 108W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN
MIXED SWELL.
.12 HOUR FORECAST TROPICAL DEPRESSION PILAR NEAR 22.8N 106.8W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WITHIN 45 NM OF
CENTER WINDS 20 TO 30 KT. SEAS 8 TO 10 FT. ELSEWHERE FROM 20.5N
TO 23.5N E OF 108.5W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN
MIXED SWELL.
.24 HOUR FORECAST TROPICAL DEPRESSION PILAR NEAR 23.6N 107.1W.
MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 45 NM OF
CENTER EXCEPT 30 NM S QUADRANT WINDS 20 TO 25 KT. SEAS 8 TO 9
FT. ELSEWHERE FROM 22N TO 24N E OF 108.5W WINDS 20 KT OR LESS.
SEAS 8 FT IN MIXED SWELL.
.36 HOUR FORECAST...DISSIPATED.

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.

.LOW PRES NEAR 13.5N126W 1010 MB. WITHIN 180 NM SE SEMICIRCLE SW
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE FROM 10N TO 17N
BETWEEN 122W AND 130W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED
SWELL.
.24 HOUR FORECAST LOW PRES NEAR 15.5N122W 1008 MB. WITHIN 330 NM
SW QUADRANT SW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE
FROM 10N TO 16N BETWEEN 119W AND 128W WINDS 20 KT OR LESS. SEAS
TO 9 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW PRES NEAR 13N122W 1009 MB. FROM 10N TO 13N
BETWEEN 116W AND 126W WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED
SWELL.

.FROM 09N TO 13N BETWEEN 101W AND 113W WINDS 20 KT OR LESS. SEAS
TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST FROM 09N TO 12N BETWEEN 102W AND 107W WINDS 20
KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.48 HOUR FORECAST FROM 10N TO 13N BETWEEN 94W AND 101W WINDS 20
KT OR LESS. SEAS TO 9 FT IN SW TO W SWELL.

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

CONVECTION VALID AT 0830 UTC MON SEP 25...

.TROPICAL STORM PILAR...SCATTERED MODERATE ISOLATED STRONG NE
QUADRANT WITHIN 120 NM.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 11N74W TO 10N82W TO LOW PRES 1010 MB NEAR
13.5N91.5W TO 16N104W TO 13N117W TO LOW PRES 1010 MB NEAR
14N126W TO 11N135W TO BEYOND 12N140W. SCATTERED MODERATE
ISOLATED STRONG FROM 01N TO 09N BETWEEN 77W AND 80W...FROM 06N
TO 10N BETWEEN 91W AND 110W AND FROM 12N TO 14N BETWEEN 121W AND
126W. SCATTERED MODERATE FROM 10N TO 14N BETWEEN 97W AND 104W
AND FROM 08N TO 11N BETWEEN 133W AND 138W.

$$
.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.