114 
FZPN03 KNHC 182002
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC THU MAR 18 2021

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC THU MAR 18.
24 HOUR FORECAST VALID 1800 UTC FRI MAR 19.
48 HOUR FORECAST VALID 1800 UTC SAT MAR 20.

.WARNINGS.

...GALE WARNING...
.03 HOUR FORECAST WITHIN 15N94W TO 14N94W TO 15N96W TO 16N96W TO
16N94W TO 15N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 
20 TO 30 KT. SEAS LESS THAN 8 FT.
.06 HOUR FORECAST LITTLE CHANGE...EXCEPT WINDS 2O TO 35 KT. SEAS
8 TO 10 FT.
.24 HOUR FORECAST WITHIN 14N95W TO 14N96W TO 16N96W TO 16N95W 
TO 16N94W TO 14N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO 
NE WINDS 30 TO 40 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 12N94W
TO 10N98W TO 11N99W TO 16N96W TO 16N93W TO 12N94W N TO NE WINDS 
20 TO 30 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST WITHIN 14N95W TO 14N96W TO 16N96W TO 16N95W 
TO 16N94W TO 14N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO 
NE WINDS 30 TO 40 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 11N94W
TO 09N97W TO 10N101W TO 13N100W TO 16N94W TO 11N94W N TO NE 
WINDS 20 TO 30 KT. SEAS 8 TO 15 FT.

.SYNOPSIS AND FORECAST.

.COLD FRONT 30N130W TO 24N140W. WITHIN 27N137W TO 25N140W TO 
30N140W TO 30N133W TO 27N137W WINDS 20 KT OR LESS. SEAS 8 TO 12 
FT IN NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 30N126W TO 21N140W. WITHIN 
18N140W TO 30N140W TO 30N124W TO 18N140W WINDS 20 KT OR LESS. 
SEAS 8 TO 12 FT IN NW SWELL.
.48 HOUR FORECAST DISSIPATING COLD FRONT FROM 30N120W TO 23N136W.
WITHIN 28N115W TO 29N116W TO 30N116W TO 29N115W TO 28N115W NW 
WINDS 20 TO 25 KT. SEAS TO 8 FT. WITHIN 19N128W TO 07N129W TO 
07N140W TO 30N140W TO 30N116W TO 19N128W WINDS 20 KT OR LESS. 
SEAS 8 TO 11 FT IN NW TO N SWELL.

.WITHIN 07N129W TO 09N140W TO 11N140W TO 11N133W TO 10N129W TO 
07N129W WINDS 20 KT OR LESS. SEAS 8 FT IN MIXED SWELL.
.24 HOUR FORECAST WITHIN 06N123W TO 07N140W TO 11N140W TO 
09N133W TO 09N125W TO 06N123W WINDS 20 KT OR LESS. SEAS 8 FT IN
MIXED SWELL.
.48 HOUR FORECAST CONDITIONS MERGED.

.18 HOUR FORECAST WITHIN 10.5N85.5W TO 10N86W TO 10.5N87.5W TO
11N87W TO 11N85.5W TO 10.5N85.5W...INCLUDING THE GULF OF
PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

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

CONVECTION VALID AT 1950 UTC THU MAR 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 10N76W TO 05N87W. ITCZ FROM 05N87W TO 02N109W TO 
03N120W TO 04N140W. SCATTERED MODERATE ISOLATED STRONG FROM 05N 
TO 08N BETWEEN 78W AND 85W...S OF 05N BETWEEN 100W AND 110W...AND
FROM 01N TO 04N BETWEEN 128W AND 134W. SCATTERED MODERATE S OF 
02N BETWEEN 80W AND 87W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.