000
FZPN03 KNHC 210903
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1030 UTC FRI APR 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC FRI APR 21.
24 HOUR FORECAST VALID 0600 UTC SAT APR 22.
48 HOUR FORECAST VALID 0600 UTC SUN APR 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.E OF LINE FROM 30N122W TO 25N118W NW WINDS 20 TO 25 KT. SEAS
TO 10 FT. ELSEWHERE BOUNDED BY 30N128W TO 30N116W TO 22N112W
TO 06N125W TO 11N140W TO 19N140W TO 30N128W WINDS 20 KT OR
LESS. SEAS TO 9 FT PRIMARILY IN MIXED S AND NW SWELL.
.12 HOUR FORECAST WITHIN AREA BOUNDED BY 30N125W TO 30N116W TO 
20N110W TO 05N125W TO 07N140W TO 16N140W TO 30N125W WINDS 20 KT 
OR LESS. SEAS TO 10 FT PRIMARILY IN MIXED S AND NW SWELL.
.24 HOUR FORECAST WITHIN AREA BOUNDED BY 30N124W TO 30N116W TO 
20N110W TO 05N130W TO 07N140W TO 14N138W TO 30N124W WINDS 20 KT 
OR LESS. SEAS TO 9 FT PRIMARILY IN MIXED S AND NW SWELL. 
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. 

.COLD FRONT APPROACH. NW OF LINE FROM 30N137W TO 29N140W S WINDS 
20 TO 25 KT. SEAS TO 11 FT.
.18 HOUR FORECAST WEAKENING COLD FRONT FROM 30N137W TO 27N140W. 
W OF LINE FROM 30N135W TO 27N140W WINDS 20 KT OR LESS. SEAS 8 TO 
12 FT PRIMARILY IN NW SWELL.
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 30N135W TO 
26.5N140W. W OF LINE FROM 30N134W TO 24.5N140W WINDS 20 KT OR 
LESS. SEAS 8 TO 12 FT PRIMARILY IN NW SWELL.
.48 HOUR FORECAST FRONT DISSIPATED. W OF LINE FROM 30N127W TO 
10N140W WINDS 20 KT OR LESS. SEAS TO 10 FT PRIMARILY IN NW SWELL.

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

CONVECTION VALID AT 0900 UTC FRI APR 21...

.SURFACE TROUGH FROM 06N110W TO 14N110W...SCATTERED MODERATE 
ISOLATED STRONG WITHIN 180 NM OF 08N108W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
TROUGH FROM 08N84W TO 06N101W. ITCZ FROM 07N110W TO 05N140W. 
ISOLATED MODERATE TO STRONG FROM 04N TO 09N E OF 97W...AND 
WITHIN 45 NM OF LINE FROM 04N114W TO 09N124W TO 05N140W. 

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.