High Seas Forecast
Issued by NWS

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000
FZPN03 KNHC 240254
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC SUN SEP 24 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC SUN SEP 24.
24 HOUR FORECAST VALID 0000 UTC MON SEP 25.
48 HOUR FORECAST VALID 0000 UTC TUE SEP 26.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM PILAR NEAR 18.7N 105.3W 1003 MB AT 0300 UTC SEP
24 MOVING N OR 360 DEG AT 4 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM S
SEMICIRCLE...50 NM NE QUADRANT AND 70 NM NW QUADRANT. SEAS TO 11
FT WITHIN 60 NM N SEMICIRCLE. ELSEWHERE WITHIN 90 NM NE AND 150
NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS TO 10 FT. SCATTERED
MODERATE CONVECTION WITHIN 120 NM E SEMICIRCLE. SCATTERED STRONG
CONVECTION WITHIN 180 NM W SEMICIRCLE.
.24 HOUR FORECAST TROPICAL STORM PILAR NEAR 20.3N 105.6W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM NE QUADRANT...30 NM SE QUADRANT...0 NM SW
QUADRANT...AND 70 NM NW 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 10 FT.
.48 HOUR FORECAST TROPICAL STORM PILAR NEAR 21.9N 105.9W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 30 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS 12
FT OR GREATER WITHIN 90 NM SW QUADRANT WITH SEAS TO 13 FT.
ELSEWHERE WITHIN 90 NM N AND 150 NM S SEMICIRCLES WINDS 20 TO 33
KT. SEAS TO 10 FT.
.72 HOUR FORECAST TROPICAL DEPRESSION PILAR NEAR 23.3N 106.4W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL PILAR NEAR 24.7N 107.3W. MAXIMUM
SUSTAINED WINDS 25 KT GUSTS 35 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 14N BETWEEN 102W AND 113W SW TO W WINDS 20 TO 25
KT. SEAS 8 TO 10 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 10.5N TO 12.5N BETWEEN 101W AND 111W 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 10N TO 13N BETWEEN 96W AND 102W 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 0200 UTC SAT SEP 23...

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH FROM 09N74W TO 10N84W TO 17N103W...THEN RESUMES
FROM NEAR 15N109W TO LOW PRES NEAR 12.5N127W 1009 MB TO LOW PRES
NEAR 12.5N139W 1009 MB TO BEYOND 11N140W. SCATTERED MODERATE
ISOLATED STRONG CONVECTION FROM 06N TO 10N BETWEEN 79W AND 91W.
SCATTERED MODERATE TO STRONG CONVECTION FROM 10.5N TO 16N
BETWEEN 95W AND 110W...AND 09.5N TO 12.5N BETWEEN 126W AND 138W.

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.



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