000
FZPN03 KNHC 181544
HSFEP2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1630 UTC WED APR 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC WED APR 18.
24 HOUR FORECAST VALID 1200 UTC THU APR 19.
48 HOUR FORECAST VALID 1200 UTC FRI APR 20.

.WARNINGS.

...GALE WARNING...
.36 HOUR FORECAST GULF OF TEHUANTEPEC N OF 15N BETWEEN 94.5W AND 
95.5W N WINDS 20 TO 30 KT. SEAS TO 9 FT.
.39 HOUR FORECAST WITHIN 15 NM OF LINE FROM 16N95W TO 14.5N95W 
INCLUDING GULF OF TEHUANTEPEC...N WINDS 30 TO 35 KT. SEAS 10 TO 
12 FT. ELSEWHERE WITHIN 30 NM OF LINE FROM 16N95W TO 14N95W N 
WINDS 20 TO 30 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST WITHIN 15 NM OF LINE FROM 16N95W TO 14N95.5W 
INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 35 KT. SEAS 
10 TO 14 FT. ELSEWHERE WITHIN 60 NM OF LINE FROM 16N95W TO 
14N95.5W TO 11.5N96.5N N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 10 
FT.

.SYNOPSIS AND FORECAST.

.N OF LINE FROM 23N114W TO 16N140W AND E OF LINE FROM 16N140W TO 
24N140W TO 30N123W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW 
SWELL. 
.24 HOUR FORECAST TROUGH FROM 05N126W TO 10N119W. FROM 10N TO 13N 
BETWEEN 127W AND 132W NE WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. 
ELSEWHERE W OF LINE FROM 23N140W TO 22N135W TO 15N119W TO 10N118W 
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL. 
.48 HOUR FORECAST TROUGH FROM 04N127W TO 10N125W. WITHIN 120 NM 
OF LINE FROM 15N121W TO 08N137W NE WINDS 20 TO 25 KT. SEAS 9 TO 
11 FT. ELSEWHERE W OF LINE FROM 23N140W TO 17N118W TO 14N113W TO 
11N117W TO 06N132W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED 
SWELL.

.S OF LINE FROM 03.4S90W TO 08N95W TO 17N115W TO 00N124W WINDS 
20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST S OF LINE FROM 03.4S90W TO 11N96W TO 11N110W TO 
00N122W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST FROM 08N TO 11N BETWEEN 98W AND 103W WINDS 20 
KT OR LESS. SEAS 8 FT IN MIXED SWELL.

.WITHIN 30 NM OF LINE FROM 11.5N86W TO 10.5N88W...INCLUDING GULF 
OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 8 FT.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.15 HOUR FORECAST WITHIN 30 NM OF LINE FROM 11N86W TO 
11N88W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS 
TO 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.39 HOUR FORECAST WITHIN 30 NM OF LINE FROM 11N86W TO 
10.5N88W...INCLUDING GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. 
SEAS TO 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.36 HOUR FORECAST N OF 27N E OF 117W...VIZCAINO BAY...NW WINDS 
20 TO 
25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST FROM 24N TO 27N E OF 114W NW WINDS 20 TO 25 KT. 
SEAS TO 9 FT. ELSEWHERE E OF LINE FROM 22N114W TO 30N124W WINDS 
20 KT OR LESS. SEAS TO 9 FT IN NW SWELL.

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

CONVECTION VALID AT 1515 UTC WED APR 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 07N78W TO 05N82W TO 07N89W TO 07N91W. ITCZ 
CONTINUES FROM 07N91W TO 07N96W TO 08N109W TO 04N123W TO 06N131W 
TO BEYOND 07N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 60 
NM EITHER SIDE OF TROUGH AXIS FROM 81W AND 89W...FROM 05N TO 08N 
BETWEEN 93W AND 99W AND WITHIN AN AREA BOUND BY 08N100W TO 
04N122W TO 16N118W TO 13N108W TO 08N100W. 

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.