000
FZPN03 KNHC 180920 RRA
HSFEP2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1030 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC WED APR 18.
24 HOUR FORECAST VALID 0600 UTC THU APR 19.
48 HOUR FORECAST VALID 0600 UTC FRI APR 20.

.WARNINGS.

...GALE WARNING...
.42 HOUR FORECAST GULF OF TEHUANTEPEC N OF 15N BETWEEN 94.5W AND 
95.5W N WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST WITHIN 45 NM OF LINE FROM 16N95W TO 14N95.5W 
INCLUDING GULF OF TEHUANTEPEC...N WINDS 25 TO 35 KT. SEAS 8 TO 
12 FT.

.SYNOPSIS AND FORECAST.

.NW OF LINE FROM 25N114W TO 17N140W WINDS 20 KT OR LESS. SEAS TO 
9 FT IN NW SWELL. S OF LINE FROM 03.4S91W TO 17N112W TO 00N123W 
WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED SWELL.
.24 HOUR FORECAST S OF 10N BETWEEN 91W AND 120W WINDS 20 KT OR 
LESS. SEAS TO 9 FT IN MIXED SWELL.
.48 HOUR FORECAST WITHIN 90 NM OF LINE FROM 16N122W TO 09N132W 
NE WINDS 20 TO 25 KT. SEAS 9 TO 10 FT. ELSEWHERE W OF LINE FROM 
22N140W TO 14N113W TO 07N132W TO 12N140W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN MIXED SWELL.

.WITHIN 30 NM OF LINE FROM 11N86W TO 10N89W...INCLUDING GULF 
OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 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 0900 UTC WED APR 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 08N78W TO 08N87W TO 07N91W. ITCZ FROM 07N91W 
TO 09N110W TO 07N118W TO 05N125W TO 07N140W. SCATTERED MODERATE 
ISOLATED STRONG FROM 05N TO 10N BETWEEN 94W AND 107W... AND FROM 
05N TO 14N BETWEEN 107W AND 129W. 

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.