High Seas Forecast
Issued by NWS

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FZPN03 KNHC 182103
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC FRI AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1800 UTC FRI AUG 18.
24 HOUR FORECAST VALID 1800 UTC SAT AUG 19.
48 HOUR FORECAST VALID 1800 UTC SUN AUG 20.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL DEPRESSION THIRTEEN-E NEAR 14.8N 117.9W 1006 MB AT
2100 UTC AUG 18 MOVING W OR 280 DEG AT 13 KT. WITHIN 180 NM N
AND 60 NM S SEMICIRCLES OF LOW WINDS 20 TO 30 KT. SEAS 8 TO 11
FT.
.12 HOUR FORECAST TROPICAL STORM THIRTEEN-E NEAR 15.1N 119.9W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE
WINDS WITHIN 40 NM N SEMICIRCLE AND 20 NM SE QUADRANT. SEAS 12
FT OR GREATER WITHIN AREA OF TROPICAL STORM FORCE WINDS WITH
SEAS TO 13 FT.
.24 HOUR FORECAST TROPICAL STORM THIRTEEN-E NEAR 15.6N 122.7W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE
WINDS WITHIN 40 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12
FT OR GREATER WITHIN 60 NM N AND 30 NM S SEMICIRCLES OF LOW WITH
SEAS TO 15 FT. ELSEWHERE WITHIN 210 NM NW AND 120 NM SE
SEMICIRCLES WINDS 20 TO 33 KT. SEAS TO 11 FT.
.48 HOUR FORECAST HURRICANE THIRTEEN-E NEAR 17.2N 128.0W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM N SEMICIRCLE AND 40 NM S SEMICIRCLE. SEAS 12
FT OR GREATER WITHIN 120 NM N AND 60 NM S SEMICIRCLES WITH SEAS
TO 21 FT. ELSEWHERE WITHIN 210 NM NW AND 120 NM SE SEMICIRCLES
OF LOW WINDS 20 TO 33 KT. SEAS TO 11 FT.
.72 HOUR FORECAST HURRICANE THIRTEEN-E NEAR 18.9N 131.6W.
MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE THIRTEEN-E NEAR 21.0N 133.3W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST TROPICAL STORM THIRTEEN-E NEAR 23.9N 133.9W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 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.

.12 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO
14.5N95W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25
KT. SEAS TO 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO
15N95W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25
KT. SEAS TO 8 FT.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 2100 UTC FRI AUG 18...

.TROPICAL DEPRESSION 13-E...SCATTERED STRONG WITHIN 210 NM W
AND 180 NM E SEMICIRCLES OF THE CENTER.

.TROPICAL WAVE AXIS NEAR 98W N OF 07N...SCATTERED MODERATE
ISOLATED STRONG FROM 06N TO 09N BETWEEN 91W AND 100W.

.TROPICAL WAVE AXIS NEAR 111W FROM 10N TO 22N...SCATTERED
MODERATE FROM 20N TO 22N BETWEEN 109W AND 111W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N76W TO 08N98W TO 10N110W WHERE IT LOSES
IDENTITY. IT RESUMES SW OF TD THIRTEEN-E TO 12N124W TO 13N130W
TO 12N136W TO 13N140W. SCATTERED MODERATE ISOLATED STRONG N OF
04N AND E OF 82W. SCATTERED MODERATE FROM 08N TO 10N BETWEEN
110W AND 113W. SCATTERED MODERATE WITHIN 180 NM S OF THE MONSOON
TROUGH W OF 135W.

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.



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