236 
FZPN03 KNHC 271558
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC MON AUG 27 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC MON AUG 27.
24 HOUR FORECAST VALID 1200 UTC TUE AUG 28.
48 HOUR FORECAST VALID 1200 UTC WED AUG 29.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM MIRIAM NEAR 13.9N 130.5W 999 MB AT 1500 UTC AUG
27 MOVING W OR 270 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 55 KT
GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM OF CENTER
EXCEPT 30 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 60 NM E 
SEMICIRCLE AND 0 NM W SEMICIRCLE WITH SEAS TO 14 FT. ELSEWHERE 
WITHIN AREA BOUNDED BY 15N129W TO 14N129W TO 13N129W TO 12N131W
TO 13N132W TO 15N131W TO 15N129W WINDS 20 TO 33 KT. SEAS 8 TO 12
FT. REMAINDER OF AREA BOUNDED BY 17N128W TO 12N128W TO 11N131W 
TO 13N133W TO 17N132W TO 18N129W TO 17N128W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN MIXED SWELL.
.12 HOUR FORECAST HURRICANE MIRIAM NEAR 13.9N 132.3W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS
WITHIN 50 NM OF CENTER EXCEPT 30 NM SW QUADRANT. SEAS 12 FT OR
GREATER WITHIN AREA OF TROPICAL STORM FORCE WINDS WITH SEAS TO 18
FT. ELSEWHERE WITHIN AREA BOUNDED BY 15N131W TO 14N130W TO 
13N131W TO 12N133W TO 15N134W TO 16N132W TO 15N131W WINDS 20 TO 
33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA BOUNDED BY 18N130W TO 
13N129W TO 11N131W TO 13N134W TO 17N134W TO 19N133W TO 18N130W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE MIRIAM NEAR 13.8N 134.3W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM NW AND SE QUADRANTS...60 NM NE QUADRANT AND 40 NM SW
QUADRANT. SEAS 12 FT OR GREATER WITHIN AREA OF TROPICAL STORM
FORCE WINDS WITH SEAS TO 24 FT. ELSEWHERE WITHIN AREA BOUNDED BY
15N132W TO 13N133W TO 12N135W TO 13N136W TO 15N136W TO 16N133W 
TO 15N132W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA 
BOUNDED BY 19N132W TO 14N131W TO 11N134W TO 12N135W TO 15N137W 
TO 19N135W TO 19N132W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN
MIXED SWELL.
.48 HOUR FORECAST HURRICANE MIRIAM NEAR 14.1N 138.1W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS 
WITHIN 70 NM N SEMICIRCLE...60 NM SE QUADRANT AND 50 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN AREA OF TROPICAL STORM
FORCE WINDS WITH SEAS TO 28 FT. ELSEWHERE WITHIN AREA BOUNDED
BY 15N136W TO 13N136W TO 12N139W TO 13N140W TO 15N140W TO 
17N138W TO 15N136W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER
OF AREA BOUNDED BY 18N134W TO 13N134W TO 10N139W TO 10N140W TO 
20N140W TO 18N134W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED
SWELL.
.72 HOUR FORECAST HURRICANE MIRIAM NEAR 15.5N 140.8W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE MIRIAM NEAR 18.7N 141.8W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT.
.120 HOUR FORECAST TROPICAL STORM MIRIAM NEAR 23.3N 143.2W. 
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 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...
.LOW PRES NEAR 13.5N108.5W 1008 MB. WITHIN 120 NM NE SEMICIRCLE
WINDS 20 TO 25 KT. SEAS BUILDING TO 8 FT. POSSIBLE TROPICAL 
CYCLONE FORMATION.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
16N112.W 1006 MB. WITHIN 150 NM NE SEMICIRCLE WINDS 20 TO 30 KT.
SEAS 8 TO 11 FT. 
.36 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
16.5N114.5W 1004 MB. WITHIN AREA BOUNDED BY 18N113W TO 17N113W 
TO 15N115W TO 15N116W TO 18N117W TO 19N116W TO 18N113W WINDS 20 
TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
17.5N116W 1002 MB. WITHIN AREA BOUNDED BY 18N115W TO 17N115W TO
17N116W TO 17N117W TO 18N117W TO 19N116W TO 18N115W WINDS 30 TO 
35 KT. SEAS 8 TO 12 FT. ELSEWHERE WITHIN AREA BOUNDED BY 18N114W 
TO 14N115W TO 12N116W TO 19N118W TO 20N116W TO 18N114W WINDS 20 
TO 30 KT. SEAS 8 TO 10 FT.

.SYNOPSIS AND FORECAST.

.WITHIN AREA BOUNDED BY 21N136W TO 19N136W TO 18N138W TO 19N138W
TO 19N140W TO 22N139W TO 21N136W NE TO E WINDS 20 TO 25 KT. SEAS
8 TO 10 FT.
.24 HOUR FORECAST WITHIN AREA BOUNDED BY 19.5N139.5W TO 19N139W 
TO 17.5N139.5W TO 17N140W TO 21N140W TO 19.5N139.5W WINDS 20 KT 
OR LESS. SEAS TO 8 FT IN MIXED NE AND SE SWELL.
.30 HOUR FORECAST CONDITIONS IMPROVE. 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 1500 UTC MON AUG 27...

.TROPICAL STORM MIRIAM...NUMEROUS MODERATE SCATTERED STRONG 
WITHIN 90 NM NE SEMICIRCLE AND 180 NM SW SEMICIRCLE.

.LOW PRES NEAR 13.5N108.5W...SCATTERED MODERATE ISOLATED STRONG 
WITHIN 210 NM IN THE NW SEMICIRCLE.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM LOW PRES OVER NORTHERN COLOMBIA
NEAR 09N75W TO 06N86W TO 13N103W THEN RESUMES NEAR 12N111W TO 
09N122W TO 12N127W THEN RESUMES NEAR 15N135W TO 14N140W. 
SCATTERED MODERATE ISOLATED STRONG FROM 03N TO 07N E OF 80W... 
WITHIN 180 NM N OF THE AXIS BETWEEN 81W AND 102W...FROM 09N TO 
11N BETWEEN 102W AND 105W...FROM 07N TO 10N BETWEEN 112W AND 
122W...FROM 18N TO 21N W OF 137W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.