000
FZPN03 KNHC 232133
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC SAT SEP 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC SAT SEP 23.
24 HOUR FORECAST VALID 1800 UTC SUN SEP 24.
48 HOUR FORECAST VALID 1800 UTC MON SEP 25.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL DEPRESSION EIGHTEEN-E NEAR 18.4N 105.3W 1005 MB AT 
2100 UTC SEP 23 MOVING NNW OR 335 DEG AT 4 KT. MAXIMUM SUSTAINED 
WINDS 30 KT GUSTS 40 KT. WITHIN 60 NM NE SEMICIRCLE WINDS 20 TO 
30 KT. SEAS TO 9 FT. ELSEWHERE WITHIN 90 NM NE AND 150 NM SW 
SEMICIRCLES WINDS 20 TO 25 KT. SEAS TO 10 FT. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WITHIN 120 NM E SEMICIRCLE. SCATTERED 
STRONG CONVECTION WITHIN 150 NM W SEMICIRCLE. 
.12 HOUR FORECAST TROPICAL STORM EIGHTEEN-E NEAR 18.8N 105.5W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. WITHIN 50 NM NE 
SEMICIRCLE WINDS 30 TO 40 KT. SEAS TO 11 FT. ELSEWHERE WITHIN 90 
NM NE AND 150 NM SW SEMICIRCLES WINDS 20 TO 30 KT. SEAS TO 11 
FT. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 120 NM E AND 
150 NM W SEMICIRCLES. 
.24 HOUR FORECAST TROPICAL STORM EIGHTEEN-E NEAR 19.4N 105.7W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 50 NM OF CENTER EXCEPT 0 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 90 NM SW QUADRANT WITH SEAS TO 13 FT. 
ELSEWHERE WITHIN 90 NM NE AND 150 NM SW SEMICIRCLES WINDS 20 TO 
33 KT. SEAS TO 11 FT. 
.48 HOUR FORECAST TROPICAL STORM EIGHTEEN-E NEAR 21.2N 106.2W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. LITTLE CHANGE IN 
RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER. 
ELSEWHERE WITHIN 90 NM N AND 150 NM S SEMICIRCLES WINDS 20 TO 33 
KT. SEAS TO 11 FT. 
.72 HOUR FORECAST TROPICAL STORM EIGHTEEN-E NEAR 22.7N 107.0W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL EIGHTEEN-E NEAR 24.0N 108.4W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW EIGHTEEN-E NEAR 
26.0N 110.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.FROM 10N TO 13.5N BETWEEN 103W AND 111W...AND FROM 10N TO 11.5N 
BETWEEN 111W AND 118W...SW TO W WINDS 20 TO 25 KT. SEAS 8 TO 11 
FT. ELSEWHERE FROM 08.5N TO 15.5N BETWEEN 98W AND 136W WINDS 20 
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST FROM 10N TO 13N BETWEEN 103W AND 113W SW TO W 
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE FROM 08.5N TO 14N 
BETWEEN 96W AND 115W WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED 
SWELL.
.48 HOUR FORECAST FROM 08.5N TO 12N BETWEEN 98W AND 108W SW TO W 
WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE FROM 08N TO 12.5N 
BETWEEN 95W AND 112W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED 
SWELL.

.48 HOUR FORECAST LOW PRES NEAR 13.5N125W 1010 MB. WITHIN 150 NM 
NW AND 210 NM SE SEMICIRCLES WINDS 20 TO 25 KT. SEAS TO 8 FT.

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

CONVECTION VALID AT 2100 UTC SAT SEP 23... 

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH FROM 09N73W TO 11.5N85W TO 15.5N102W...THEN 
RESUMES FROM NEAR 15N110W TO LOW PRES NEAR 12.5N127W 1010 MB TO 
LOW PRES NEAR 13N138W 1010 MB TO BEYOND 11N140W. SCATTERED 
MODERATE TO STRONG CONVECTION FROM 03.5N TO 15.5N BETWEEN 78W 
AND 90W...FROM 10N TO 15N BETWEEN 92W AND 115W...AND 08.5N TO 
12.5N BETWEEN 125W AND 138W. 

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.