491
FZPN03 KNHC 232207
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC MON SEP 23 2024

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

THE NATIONAL WEATHER SERVICE IS ACCEPTING PUBLIC COMMENTS UNTIL
OCTOBER 16 2024 ON A PROPOSAL TO REPLACE FEET WITH METERS WHEN
DESCRIBING SEAS IN A VARIETY OF NATIONAL MARINE CENTER TEXT AND
GRAPHICAL PRODUCTS FOR THE HIGH SEAS AREAS ONLY.
TO LEARN MORE PLEASE VISIT (WEB ADDRESS LOWERCASE)
HTTPS://OCEAN.WEATHER.GOV/PROPOSED-METERS.PHP

SECURITE

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

SYNOPSIS VALID 1800 UTC MON SEP 23.
24 HOUR FORECAST VALID 1800 UTC TUE SEP 24.
48 HOUR FORECAST VALID 1800 UTC WED SEP 25.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE JOHN NEAR 15.5N 98.5W 973 MB AT 2100 UTC SEP 23
MOVING N OR 00 DEG AT 5 KT. MAXIMUM SUSTAINED WINDS 85 KT GUSTS
105 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM OF CENTER EXCEPT
30 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 45 NM N
SEMICIRCLE AND 75 NM S SEMICIRCLE WITH SEAS TO 16 FT. ELSEWHERE
WITHIN 12N96W TO 16N99W TO 13N104W TO 12N110W TO 10N102W TO
11N97W TO 12N96W WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF
AREA WITHIN 12N95W TO 16N100W TO 13N102W TO 14N106W TO 12N110W
TO 08N96W TO 12N95W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED
SWELL.
.24 HOUR FORECAST HURRICANE JOHN INLAND NEAR 16.5N 98.3W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE
WINDS WITHIN 30 NM N SEMICIRCLE...60 NM SE QUADRANT AND 80 NM SW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 NM OF CENTER WITH PEAK
SEAS NEAR 21 FT. ELSEWHERE WITHIN 14N96W TO 17N99W TO 14N101W TO
12N108W TO 09N106W TO 12N96W TO 14N96W WINDS 20 TO 33 KT. SEAS
10 TO 12 FT. REMAINDER OF AREA WITHIN 13N91W TO 17N101W TO
11N112W TO 08N104W TO 07N92W TO 13N91W...INCLUDING THE GULF OF
TEHUANTEPEC...WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN W TO SW
SWELL.
.36 HOUR FORECAST POST-TROPICAL JOHN NEAR 16.7N 98.4W. MAXIMUM
SUSTAINED WINDS 30 KT GUSTS 40 KT.
.48 HOUR FORECAST WITHIN 15N95W TO 14N102W TO 11N108W TO 10N106W
TO 10N99W TO 12N94W TO 15N95W...INCLUDING THE GULF OF
TEHUANTEPEC...WINDS 20 TO 30 KT. SEAS 11 TO 14 FT. ELSEWHERE
WITHIN 16N94W TO 17N105W TO 10N111W TO 08N103W TO 08N93W TO
12N88W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...WINDS 20
KT OR LESS. SEAS 9 TO 11 FT IN W TO NW SWELL.

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

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

CONVECTION VALID AT 1800 UTC MON SEP 23...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH AXIS EXTENDS FROM 1007 MB LOW PRES NEAR 16N107W
TO 13N115W TO 12N140W. SCATTERED MODERATE FROM 08N TO 12N
BETWEEN 124W AND 137W.

$$
.FORECASTER ADAMS. NATIONAL HURRICANE CENTER.