High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 251011
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC SUN FEB 25 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

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 FEB 25.
24 HOUR FORECAST VALID 0600 UTC FEB 26.
48 HOUR FORECAST VALID 0600 UTC FEB 27.

.WARNINGS.

...STORM WARNING...
.LOW 53N174E 985 MB MOVING NE 25 KT. FRONT EXTENDS FROM 55N177E
TO 53N178W TO 49N177W TO 40N178E. BETWEEN 90 NM AND 240 NM SW
QUADRANT...ALSO BETWEEN 90 NM AND 300 NM S QUADRANT WINDS 40 TO
55 KT. SEAS 15 TO 25 FT. ELSEWHERE WITHIN 420 NM S
SEMICIRCLE...240 NM NW AND 360 NM NE QUADRANTS WINDS 30 TO 45
KT. SEAS 10 TO 20 FT. ALSO WITHIN 180 NM NE AND E OF FRONT N OF
47N WINDS 25 TO 35 KT. SEAS 9 TO 16 FT.
.24 HOUR FORECAST LOW 60N171W 981 MB. FROM 53N TO 58N BETWEEN
166W AND 178 WINDS 40 TO 60 KT. SEAS 20 TO 36 FT. ELSEWHERE FROM
51N TO 60N BETWEEN 158W AND 178E...ALSO N OF 60N W OF 170W WINDS
30 TO 45 KT. SEAS 12 TO 24 FT.
.48 HOUR FORECAST LOW 61N148W 989 MB. WITHIN 360 NM S AND 240 NM
SW QUADRANTS WINDS 35 TO 50 KT. SEAS 12 TO 26 FT. ELSEWHERE
BETWEEN 53N AND 60N E OF 156W WINDS 25 TO 40 KT. SEAS 12 TO 23
FT.

...STORM WARNING...
.24 HOUR FORECAST FROM 50N TO 57N BETWEEN 145W AND 158W WINDS 25
TO 35 KT. SEAS 8 TO 13 FT.
.36 HOUR FORECAST LOW 60N141W 989 MB. WITHIN 180 NM S SEMICIRCLE
WINDS 35 TO 50 KT. SEAS 10 TO 18 FT.
.48 HOUR FORECAST LOW INLAND WITH CONDITIONS DESCRIBED WITH LOW
61N148W.

...STORM WARNING...
.48 HOUR FORECAST LOW 41N166E 983 MB. WITHIN 300 NM E...180 NM
SE...180 NM SW AND 120 NM W QUADRANTS WINDS 40 TO 55 KT. SEAS 13
TO 21 FT. ELSEWHERE WITHIN 420 NM NE...480 NM SE...540 NM
S...420 NM SW...300 NM W AND 180 NM N QUADRANTS WINDS 25 TO 40
KT. SEAS 8 TO 15 FT.

...GALE WARNING...
.LOW 57N136W 988 MB MOVING SE 20 KT. WITHIN 660 NM SW SEMICIRCLE
WINDS 30 TO 45 KT. SEAS 12 TO 28 FT. ELSEWHERE N AND NE OF A
LINE FROM 54N163W TO 42N131W TO 45N124W WINDS 20 TO 30 KT. SEAS
8 TO 15 FT.
.24 HOUR FORECAST LOW DISSIPATED INLAND. FROM 37N TO 56N E OF
140W WINDS 20 TO 30 KT. SEAS 12 TO 21 FT.
.48 HOUR FORECAST FROM 34N TO 41N BETWEEN 121W AND 127W WINDS 25
TO 35 KT. SEAS 12 TO 20 FT. ELSEWHERE S OF 42N BETWEEN 118W AND
132W WINDS 20 TO 30 KT. SEAS 8 TO 15 FT.

...GALE WARNING...
.LOW 43N158E 1009 MB MOVING NE 25 KT. FROM 40N TO 43N W OF 161E
WINDS 25 TO 35 KT. SEAS 9 TO 13 FT.
.24 HOUR FORECAST LOW 50N170E 1006 MB. FROM 46N TO 50N BETWEEN
165E AND 177E WINDS 25 TO 40 KT. SEAS 10 TO 18 FT.
.48 HOUR FORECAST LOW DISSIPATED WITH NEW LOW FORMED NEAR
58N168W 1009 MB. WITHIN AN AREA BOUNDED BY
57N167W...53N179W...51N178W...
51N168W...53N162W...56N163W...57N167W WINDS 25 TO 35 KT. SEAS 9
TO 15 FT.

...GALE WARNING...
.WITHIN 360 NM NE AND E OF A LINE FROM 36N171W TO 30N164W WINDS
20 TO 30 KT. SEAS 9 TO 13 FT.
.24 HOUR FORECAST FROM 32N TO 37N BETWEEN 161W AND 166W WINDS 25
TO 35 KT. SEAS 9 TO 14 FT. ELSEWHERE WITHIN 480 NM E OF A LINE
FROM 30N166W TO 38N168W WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST NEW LOW 43N165W 1016 MB. S OF 45N BETWEEN 156W
AND 163W...ALSO WITHIN 180 NM S AND 240 NM W SEMICIRCLES WINDS
20 TO 30 KT. SEAS 9 TO 14 FT.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY OVER ICE FREE FORECAST WATERS
N OF A LINE FROM 61N166W TO 63N172W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 61N W OF
ALASKA.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE
FROM 60N166W TO 62N175W.

.SYNOPSIS AND FORECAST.

.FROM 31N TO 39N BETWEEN 119W AND 125W WINDS TO 25 KT. SEAS TO
11 FT.
.24 HOUR FORECAST FROM 31N TO 36N BETWEEN 120W AND 124W WINDS
LESS THAN 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST CONDITIONS DESCRIBED IN WARNINGS SECTION
ABOVE.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 52N
BETWEEN 167W AND 178W...ALSO FROM 31N TO 36N BETWEEN 161W AND
167W.
.24 HOUR FORECAST DENSE FOG FROM 32N TO 46N BETWEEN 160W AND
171W...ALSO FROM 46N TO 50M BETWEEN 154W AND 158W.
.48 HOUR FORECAST DENSE FOG FROM 31N TO 48N BETWEEN 152W AND
169W...ALSO FROM 36N TO 42N BETWEEN 166E AND 170E

.HIGH 40N148W 1040 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH 36N145W 1040 MB.

.HIGH 43N156W 1040 MB MOVING SE 10 KT.
.24 HOUR FORECAST HIGH MERGED WITH HIGH 40N148W DESCRIBED ABOVE.

.HIGH 40N169E 1024 MB MOVING NE 40 KT.
.24 HOUR FORECAST HIGH 47N172W 1030 MB.
.48 HOUR FORECAST HIGH 50N156W 1027 MB.

.48 HOUR FORECAST HIGH 47N176W 1029 MB.

.FORECASTER SHAW. 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 SUN FEB 25.
24 HOUR FORECAST VALID 0600 UTC MON FEB 26.
48 HOUR FORECAST VALID 0600 UTC TUE FEB 27.

.WARNINGS.

...ASHFALL ADVISORY...FUEGO VOLCANO NEAR POSITION 14.3N 90.9W IS
CURRENTLY ERUPTING. PLUME OF VOLCANIC ASH MAY REACH TO THE
SURFACE. LOW LEVEL VISIBILITY MAY BE REDUCED TO 6 NM OR LESS N
OF 13.5N E OF 93W. MARINERS SHOULD EXERCISE CAUTION. IF MARINERS
ENCOUNTER VOLCANIC ASH...THEY ARE ENCOURAGED TO REPORT THE
OBSERVATION TO THE NATIONAL WEATHER SERVICE BY CALLING 305-229-
4425.

.SYNOPSIS AND FORECAST.

.WITHIN 90 NM OF LINE FROM 13N121W TO 15N140W NE WINDS 20 TO 25
KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN AREA BOUNDED BY 30N127W TO
30N120W TO 10N114W TO 05N140W TO 25N140W TO 30N127W WINDS 20 KT
OR LESS. SEAS TO 10 FT PRIMARILY IN MIXED SWELL.
.24 HOUR FORECAST FROM 15N TO 25N BETWEEN 137W AND 140W NE WINDS
20 TO 25 KT. SEAS 10 FT. ELSEWHERE WITHIN AREA BOUNDED BY
30N126W TO 30N121W TO 10N118W TO 09N140W TO 27N140W TO 30N126W
WINDS 20 KT OR LESS. SEAS TO 9 FT PRIMARILY IN MIXED SWELL.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY A LINE FROM 25N140W TO
22N131W TO 13N125W TO 09N140W TO 25N140W NE WINDS 20 TO 25 KT.
SEAS 9 TO 13 FT. ELSEWHERE WITHIN AREA BOUNDED BY 30N135W TO
30N118W TO 10N122W TO 08N140W TO 27N140W TO 30N135W WINDS 20 KT
OR LESS. SEAS TO 10 FT PRIMARILY IN MIXED SWELL.

.FROM 10N TO 12N E OF 88W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

.GULF OF CALIFORNIA FROM 25N TO 27N NW WINDS 20 TO 25 KT. SEAS
LESS THAN 8 FT.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST GULF OF CALIFORNIA FROM 30N TO 31N S TO SW
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 0900 UTC SUN FEB 25...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 09N84W TO 02N105W TO 02N115W. ITCZ FROM
02N115W TO 07N129W TO 05N140W. SCATTERED MODERATE ISOLATED
STRONG WITHIN 150 NM OF LINE FROM 02N99W TO 02N110W AND WITHIN
240 NM OF 10N127W.

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.



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