000
FZPN03 KNHC 180244
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC WED OCT 18 2023

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 WED OCT 18.
24 HOUR FORECAST VALID 0000 UTC THU OCT 19.
48 HOUR FORECAST VALID 0000 UTC FRI OCT 20.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM NORMA NEAR 13.7N 107.8W 1000 MB AT 0300 UTC OCT
18 MOVING NW OR 305 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM N
SEMICIRCLE...30 NM SE QUADRANT AND 0 NM SW QUADRANT.  SEAS 12 FT
OR GREATER WITHIN 120 NM N SEMICIRCLE...60 NM SE QUADRANT...AND 
30 NM SW QUADRANT WITH SEAS TO 14 FT. ELSEWHERE WITHIN 16N101W 
TO 17N104W TO 16N109W TO 13N109W TO 14N103W TO 13N100W TO 16N101W
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER AREA WITHIN 
13N101W TO 14N102W TO 14N104W TO 12N106W TO 10N105W TO 10N101W TO
13N101W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE NORMA NEAR 15.5N 108.5W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 150 NM NE QUADRANT...100 NM SE QUADRANT...60 NM SW 
QUADRANT...AND 120 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
180 NM NE...150 NM SE...75 NM SW...AND 150 NM NW QUADRANTS WITH 
SEAS TO 24 FT. ELSEWHERE WITHIN 16N104W TO 18N106W TO 17N110W TO 
15N110W TO 11N107W TO 11N105W TO 16N104W WINDS 20 TO 33 KT. SEAS 
10 TO 12 FT. REMAINDER AREA WITHIN 14N101W TO 18N109W TO 11N111W 
TO 06N114W TO 04N111W TO 07N103W TO 14N101W WINDS 20 KT OR LESS. 
SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE NORMA NEAR 17.3N 108.8W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 120 NM NW AND SE QUADRANTS...160 NM NE QUADRANT AND 80 NM 
SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 210 NM E SEMICIRCLE AND
180 NM W SEMICIRCLE WITH SEAS TO 36 FT. WITHIN 21N105W TO 
30N119W TO 04N118W TO 03N112W TO 14N100W TO 21N105W WINDS 20 TO 
33 KT. SEAS 8 TO 12 FT. REMAINDER AREA WITHIN 19N104W TO 21N108W 
TO 20N110W TO 17N111W TO 14N105W TO 15N104W TO 19N104W WINDS 20 
KT OR LESS. SEAS 8 TO 12 FT.
.72 HOUR FORECAST HURRICANE NORMA NEAR 19.2N 109.6W. MAXIMUM 
SUSTAINED WINDS 95 KT GUSTS 115 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE NORMA NEAR 21.3N 110.2W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT.
.120 HOUR FORECAST HURRICANE NORMA NEAR 22.5N 109.8W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT.

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

...GALE WARNING...
.WITHIN 16N95W TO 15N96W TO 14N96W TO 14N95W TO 15N95W TO 
16N95W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS 30 
TO 40 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 15N94W TO 16N95W TO 
15N97W TO 15N100W TO 13N99W TO 13N96W TO 15N94W N TO NE WINDS 20 
TO 30 KT. SEAS 8 TO 10 FT. REMAINDER AREA WITHIN 15N94W TO 
16N96W TO 15N99W TO 08N99W TO 08N96W TO 11N94W TO 15N94W WINDS 
20 KT OR LESS. SEAS 8 TO 10 FT IN N TO NE SWELL.
.18 HOUR FORECAST WITHIN 15N95W TO 16N94W TO 16N95W TO 15N96W TO 
14N95W TO 15N95W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE 
WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE WITHIN 16N95W TO 
14N97W TO 13N98W TO 12N97W TO 12N96W TO 13N95W TO 16N95W WINDS 
20 KT OR LESS. SEAS 8 TO 10 FT IN N TO NE SWELL.
.24 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO 
15N95W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC... N WINDS 
20 TO 30 KT. SEAS 8 TO 9 FT.
.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO 
15N95W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC... N WINDS 
20 TO 25 KT. SEAS LESS THAN 8 FT.

.SYNOPSIS AND FORECAST.

.WITHIN 25N132W TO 30N134W TO 30N140W TO 12N140W TO 18N134W TO 
25N132W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL. WITHIN 
30N119W TO 30N124W TO 28N122W TO 28N121W TO 29N120W TO 30N119W 
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN N SWELL.
.24 HOUR FORECAST WITHIN 30N121W TO 30N140W TO 09N140W TO 
17N130W TO 30N121W WINDS 20 KT OR LESS. SEAS 8 TO 14 FT IN NW 
SWELL. 
.48 HOUR FORECAST WITHIN 30N121W TO 30N140W TO 04N140W TO 
03N129W TO 10N122W TO 30N121W WINDS 20 KT OR LESS. SEAS 8 TO 11 
FT IN NW SWELL.

.18 HOUR FORECAST WITHIN 01S110W TO 01S113W TO 02S115W TO 
03.4S117W TO 03.4S108W TO 01S110W WINDS 20 KT OR LESS. SEAS 8 FT 
IN S TO SW SWELL.
.24 HOUR FORECAST WITHIN 01S110W TO 01S120W TO 03.4S120W TO 
03.4S106W TO 01S110W WINDS 20 KT OR LESS. SEAS 8 FT IN SW SWELL.
.48 HOUR FORECAST WITHIN 01N95W TO 02N106W TO 01S120W TO 
03.4S120W TO 03S96W TO 01N95W WINDS 20 KT OR LESS. SEAS 8 FT IN 
SW TO W SWELL.

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

CONVECTION VALID AT 0230 UTC WED OCT 18...

T.S. NORMA...NUMEROUS MODERATE ISOLATED STRONG CONVECTION IS 
NOTED FROM 10N TO 20N BETWEEN 98W AND 112W. SCATTERED MODERATE 
AND ISOLATED STRONG CONVECTION IS NOTED FROM 03N TO 10N BETWEEN 
100W AND 112W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N86W TO 11N102W. IT RESUMES NEAR 12N110W 
TO 08N140W. SCATTERED MODERATE ISOLATED STRONG FROM 03N TO 14N E 
OF 98W...AND FROM 03N TO 10N BETWEEN 112W AND 128W. 

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.