High Seas Forecast
Issued by NWS

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000
FZPN03 KNHC 230321
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC THU NOV 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 0000 UTC THU NOV 23.
24 HOUR FORECAST VALID 0000 UTC FRI NOV 24.
48 HOUR FORECAST VALID 0000 UTC SAT NOV 25.

.WARNINGS.

...GALE WARNING...
.N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING THE GULF OF
TEHUANTEPEC...N WINDS 30 TO 40 KT. SEAS BUILDING 8 TO 10 FT.
ELSEWHERE WITHIN 45 NM OF LINE FROM 16N95W TO 14.5N95W N WINDS
20 TO 30 KT. SEAS TO 8 FT.
.12 HOUR FORECAST WITHIN 60 NM OF LINE FROM 16N95W TO 14N95W
13N96W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 45
KT. SEAS 12 TO 16 FT. ELSEWHERE WITHIN 90 NM OF LINE FROM 16N95W
14N95.5W TO 12N97W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST WITHIN 60 NM OF LINE FROM 16N95W TO 15N95W
13N96W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 40
KT. SEAS 12 TO 14 FT. ELSEWHERE WITHIN 75 NM OF LINE FROM 16N95W
14N95.5W TO 11N98W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO
14N95.5W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 30
KT. SEAS 8 TO 10 FT. ELSEWHERE WITHIN 75 NM OF LINE FROM 16N95W
TO 14N95.5W TO 11N100W WINDS 20 KT OR LESS. SEAS TO 9 FT IN
MIXED NE AND SW SWELL.

.SYNOPSIS AND FORECAST.

.COLD FRONT ENTERING FAR NW CORNER OF AREA. W OF LINE FROM
30N133W TO 25N140W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN NW
SWELL...HIGHEST SEAS FAR NW PORTION.
.24 HOUR FORECAST STATIONARY FRONT FROM 30N138W TO 28N140W. W OF
LINE FROM 30N126W TO 23N133W TO 19N140W WINDS 20 KT OR LESS.
SEAS 8 TO 13 FT IN NW SWELL...HIGHEST NEAR 25N140W.
.48 HOUR FORECAST WEAKENING FRONT FROM 30N138W TO 22N140W. W OF
LINE FROM 30N135W TO 25N123W TO 15N130W TO 09N140W WINDS 20 KT
OR LESS. SEAS 8 TO 11 FT NW SWELL...HIGHEST NEAR 15N138W.

.36 HOUR FORECAST WITHIN 30 NM OF LINE FROM 11N85.5W TO
10N87.5W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT.
SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 0300 UTC THU NOV 23...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM LOW PRES NEAR 11N76W 1010 MB TO 10N90W TO
10N102W. ITCZ FROM 10N102W TO 10N115W TO 08N130W TO 09N140W.
SCATTERED MODERATE N OF 06N BETWEEN 80W AND 84W. SCATTERED
MODERATE ISOLATED STRONG WITHIN 60 NM OF LINE FROM 20N135W TO
18N136W.

$$
.FORECASTER COBB. NATIONAL HURRICANE CENTER.



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