118 
FZPN03 KNHC 262213
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC SUN AUG 26 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SUN AUG 26.
24 HOUR FORECAST VALID 1800 UTC MON AUG 27.
48 HOUR FORECAST VALID 1800 UTC TUE AUG 28.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM MIRIAM NEAR 13.6N 126.6W 1004 MB AT 2100 UTC AUG
26 MOVING W OR 280 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 40 KT
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM OF CENTER
EXCEPT 0 NM SW QUADRANT.  SEAS 12 FT OR GREATER WITHIN 0 NM OF
CENTER EXCEPT 40 NM NE QUADRANT WITH SEAS TO 13 FT. 
.24 HOUR FORECAST HURRICANE MIRIAM NEAR 13.7N 130.6W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 50 NM NW AND SE QUADRANTS...60 NM NE QUADRANT AND 30 NM SW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM N AND 60 NM S
SEMCIRICLES WITH SEAS TO 26 FT. ELSEWHERE WITHIN 180 NM N AND 150
NM S SEMCIRICLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST HURRICANE MIRIAM NEAR 13.7N 134.8W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 80 NM N SEMICIRCLE...60 NM SE QUADRANT AND 50 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM NW AND 90 NM SE
SEMICIRCLES WITH SEAS TO 33 FT. ELSEWHERE WITHIN 270 NM NW AND
180 NM SE SEMICIRLCES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.72 HOUR FORECAST HURRICANE MIRIAM NEAR 13.7N 138.7W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST HURRICANE MIRIAM NEAR 15.8N 141.1W. MAXIMUM 
SUSTAINED WINDS 85 KT GUSTS 105 KT. 
.120 HOUR FORECAST HURRICANE MIRIAM NEAR 19.7N 141.7W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 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.

.LOW PRES NEAR 12N106W 1009 MB. WINDS 20 KT OR LESS. SEAS LESS 
THAN 8 FT. 
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
14N111W 1008 MB. WITHIN 180 NM NE QUADRANT WINDS 20 TO 25 KT.
SEAS 8 TO 11 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...18N117W
1007 MB. WITHIN 180 NM NE QUADRANT WINDS 20 TO 30 KT. SEAS 8 TO
12 FT.

.06 HOUR FORECAST WITHIN 60 NM EITHER SIDE OF LINE FROM 16N95W 
TO 15N96W N TO NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.FROM 11N TO 13N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST FROM 11N TO 13N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.48 HOUR FORECAST FROM 11N TO 13N BETWEEN 90W AND 92W E WINDS 20
TO 25 KT. SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 2100 UTC SUN AUG 26...

TROPICAL STORM MIRIAM...NUMEROUS MODERATE TO STRONG WITHIN 90 NM
OF THE CENTER.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM  09N79W TO LOW PRESSURE NEAR 
12N106W TO 14N120W. SCATTERED MODERATE WITHIN 180 NM S OF MONSOON
TROUGH AXIS BETWEEN 85W AND 90W...AND WITHIN 210 NM N OF MONSOON
TROUGH AXIS BETWEEN 102W AND 108W.

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.