000
FZPN03 KNHC 200307
HSFEP2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
0430 UTC FRI APR 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

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

SYNOPSIS VALID 0000 UTC FRI APR 20.
24 HOUR FORECAST VALID 0000 UTC SAT APR 21.
48 HOUR FORECAST VALID 0000 UTC SUN APR 22.

.WARNINGS.

...GALE WARNING...
.GULF OF TEHUANTEPEC N OF 14N BETWEEN 94.5W AND 95.5W N WINDS 25 
TO 35 KT. SEAS 8 TO 10 FT.
.03 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 16N95W TO 14N96W N 
TO NE WINDS 30 TO 40 KT. SEAS 10 TO 14 FT. ELSEWHERE WITHIN 60 
NM OF LINE FROM 16N95W TO 13N95.5W NE TO E WINDS 20 TO 25 KT. 
SEAS 8 TO 10 FT.
.15 HOUR FORECAST WITHIN 45 NM OF LINE FROM 16N95W TO 14.5N95W TO 
11N97W...INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30 
KT. SEAS 10 TO 13 FT. ELSEWHERE WITHIN 90 NM OF LINE FROM 16N95W 
TO 11N95.5W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED NE AND 
SW SWELL.
.24 HOUR FORECAST GULF OF TEHUANTEPEC N OF 14.5N BETWEEN 94.5W 
AND 95.5W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 9 FT. ELSEWHERE 
WITHIN AREA BOUNDED BY 16N95W TO 10N93W TO 10N100W TO 16N95W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED NE AND SW SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.SYNOPSIS AND FORECAST.

.WEAKENING COLD FRONT FROM 30N115.5W TO 27N125W TO 29N135W. N OF 
25N E OF 116W...INCLUDING SEBASTIAN VIZCAINO BAY...NW WINDS 20 
TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST FRONT DISSIPATED. N OF 29N E OF 122W AND FROM 
22N TO 24MN BETWEEN 112W AND 115W WINDS 20 KT OR LESS. SEAS 8 FT 
IN NW SWELL.
.48 HOUR FORECAST N OF LINE FROM 27N132W TO 27N126W TO 29N119W 
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.

.WITHIN 90 NM OF LINE FROM 13N126W TO 10N131W TO 10N138W NE 
WINDS 20 TO 25 KT. SEAS 9 TO 10 FT. ELSEWHERE W OF LINE FROM 
23N140W TO 18N119W TO 12N117W TO 07N131W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN MIXED SWELL. 
.24 HOUR FORECAST TROUGH FROM 05N127W TO 12N125W. FROM 10N TO 15N 
BETWEEN 123W AND 128W NE WINDS 20 TO 25 KT. SEAS 9 TO 12 FT. 
ELSEWHERE W OF LINE FROM 24N140W TO 12N111W TO 04N137W WINDS 20 
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. 
.48 HOUR FORECAST TROUGH FROM 05N132W TO 12N131W. W OF LINE FROM 
30N133W TO 06N121W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED 
SWELL.

.S OF LINE FROM 03.4S95W TO 12N99W TO 10N106W TO 03.4S120W WINDS 
20 KT OR LESS. SEAS 8 FT IN MIXED SW AND NW SWELL.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.WITHIN 30 NM OF LINE FROM 11N86W TO 10.5N89W...INCLUDING GULF OF 
PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 8 FT.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 11N86W TO 
10.5N89W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. 
SEAS TO 8 FT.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 30 NM OF LINE FROM 11N86W TO 
10.5N88W...INCLUDING GULF OF PAPAGAYO...NE 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 0245 UTC FRI APR 20...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 08N82W TO 06N90W TO 06N95W. ITCZ CONTINUES FROM 
06N95W TO 07N100W TO 07N121W TO 06N131W TO BEYOND 06N140W. 
SCATTERED MODERATE ISOLATED STRONG FROM 06N TO 12N BETWEEN 111W 
AND 126W. ISOLATED MODERATE AND STRONG WITHIN 90 NM EITHER SIDE 
OF TROUGH AND ITCZ AXIS BETWEEN 92W AND 110W. 

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.