270 
FZPN03 KNHC 312137
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC FRI AUG 31 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 31.
24 HOUR FORECAST VALID 1800 UTC SAT SEP 01.
48 HOUR FORECAST VALID 1800 UTC SUN SEP 02.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE NORMAN NEAR 16.5N 121.5W 954 MB AT 2100 UTC AUG 31 
MOVING WSW OR 255 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 110 KT 
GUSTS 135 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM N 
SEMICIRCLE...80 NM SE QUADRANT AND 70 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 150 NM OF CENTER WITH SEAS TO 37 FT. ELSEWHERE 
WITHIN 150 NM OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
REMAINDER OF AREA WITHIN 270 NM OF CENTER WINDS 20 KT OR LESS. 
SEAS TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE NORMAN NEAR 16.2N 124.4W. MAXIMUM 
SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS 
WITHIN 90 NM OF CENTER EXCEPT 70 NM SW QUADRANT. SEAS 12 FT OR 
GREATER WITHIN 150 NM OF CENTER EXCEPT 120 NM SW QUADRANT WITH 
SEAS TO 35 FT. ELSEWHERE WITHIN 150 NM OF CENTER WINDS 20 TO 33 
KT. SEAS 8 TO 12 FT. REMAINDER OF AREA FROM 11N TO 21N BETWEEN 
120W AND 130W WINDS 20 KT OR LESS. SEAS TO 12 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE NORMAN NEAR 17.3N 129.9W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM N SEMICIRCLE...80 NM SE QUADRANT AND 70 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 210 NM NW AND 180 NM SE 
SEMICIRCLES WITH SEAS TO 33 FT. ELSEWHERE WITHIN 150 NM NW AND 
120 NM SE SEMICIRCLES WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. 
REMAINDER OF AREA FROM 05N TO 23N BETWEEN 122W AND 136W WINDS 20 
KT OR LESS. SEAS TO 11 FT IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE NORMAN NEAR 18.9N 136.0W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE NORMAN NEAR 20.0N 141.1W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT.
.120 HOUR FORECAST HURRICANE NORMAN NEAR 20.9N 144.7W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.

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

...STORM WARNING...
.LOW PRES NEAR 14N106W 1008 MB. S SEMICIRCLE WITHIN 150 NM WINDS 
20 TO 30 KT. SEAS TO 9 FT.
.18 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14.5N108W 1006 MB. S SEMICIRCLE WITHIN 60 NM WINDS 30 TO 35 KT. 
SEAS 10 TO 12 FT. ELSEWHERE WITHIN 180 NM S AND 120 NM N 
SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
15N108.5W 1005 MB. SW SEMICIRCLE WITHIN 90 NM WINDS 30 TO 35 KT. 
SEAS 9 TO 13 FT. ELSEWHERE WITHIN 150 NM WINDS 20 TO 30 KT. SEAS 
8 TO 11 FT. REMAINDER OF AREA WITHIN 270 NM SW AND 150 NM NE 
SEMICIRCLES WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
15.5N110W 1003 MB. WITHIN 90 NM S SEMICIRCLE WINDS 40 TO 50 KT. 
SEAS 13 TO 19 FT. ELSEWHERE WITHIN 120 NM OF CENTER WINDS 30 TO 
40 KT. SEAS 10 TO 15 FT. REMAINDER OF AREA WITHIN 240 NM WINDS 
20 KT OR LESS. SEAS 8 TO 12 FT IN MIXED SWELL.

.SYNOPSIS AND FORECAST.

.HURRICANE MIRIAM W OF AREA NEAR 19.2N 141.1W 974 MB AT 2100 UTC 
AUG 31 MOVING N OR 010 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 85 
KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS AND 12 FT SEAS W OF 
AREA. FROM 18N TO 21N W OF 139W WINDS 20 TO 30 KT. SEAS 10 TO 14 
FT. ELSEWHERE FROM 17N TO 22N W OF 138W WINDS 20 KT OR LESS. 
SEAS 8 TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM MIRIAM W OF AREA NEAR 22.6N 
141.7W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL 
STORM FORCE WINDS AND 12 FT SEAS W OF AREA. FROM 20N TO 25N W OF 
139W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.36 HOUR FORECAST TROPICAL STORM MIRIAM NEAR 24.6N 143.0W. 
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. OVER FORECAST WATERS 
WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.30 HOUR FORECAST N OF 29N BETWEEN 120W AND 124W WINDS 20 KT OR 
LESS. SEAS 8 FT IN N TO NW SWELL.
.42 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 2115 UTC FRI AUG 31...

.HURRICANE NORMAN...NUMEROUS MODERATE SCATTERED STRONG SW 
QUADRANT WITHIN 210 NM AND NE QUADRANT WITHIN 60 NM. SCATTERED 
MODERATE ISOLATED STRONG ELSEWHERE FROM 12N TO 18N BETWEEN 119W 
AND 126W.

.HURRICANE MIRIAM...SCATTERED MODERATE FROM 18N TO 22N W OF 
139W. 

.LOW PRES NEAR 14N106W...NUMEROUS MODERATE SCATTERED STRONG 
FROM 12N TO 15N BETWEEN 106.5W AND 110W. SCATTERED MODERATE 
ISOLATED STRONG ELSEWHERE FROM 11N TO 19N BETWEEN 104W AND 114W.

.TROPICAL WAVE FROM 05N98W TO 18N98W...SCATTERED MODERATE 
ISOLATED STRONG FROM 07N TO 14N BETWEEN 92W AND 104W. 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM LOW PRES 1009 MB NEAR 10N75W TO 09N87W TO 
LOW PRES 1008 MB NEAR 14N107W TO 17N114W...THEN RESUMES SW OF 
NORMAN NEAR 15N124W TO 13N138W. SCATTERED MODERATE ISOLATED 
STRONG FROM 05N TO 09N E OF 92W.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.