191 
FZPN03 KNHC 091718 CCA
HSFEP2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1630 UTC THU AUG 09 2018

CORRECTED 24 HOUR FORECAST 12 FT SEAS UNDER TROPICAL STORM JOHN 

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC THU AUG 09.
24 HOUR FORECAST VALID 1200 UTC FRI AUG 10.
48 HOUR FORECAST VALID 1200 UTC SAT AUG 11.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM JOHN NEAR 24.5N 117.3W 990 MB AT 1500 UTC AUG 09 
MOVING NW OR 305 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 60 KT 
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE 
QUADRANT...70 NM SE QUADRANT...50 NM SW QUADRANT...AND 110 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 210 NM N SEMICIRCLE AND 
180 NM S SEMICIRCLE WITH SEAS TO 28 FT. ELSEWHERE WITHIN 180 NM 
OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA 
FROM 17N TO 29N BETWEEN 109W AND 121W WINDS 20 KT OR LESS. SEAS 
8 TO 11 FT IN MIXED SWELL. 
.24 HOUR FORECAST TROPICAL STORM JOHN NEAR 26.6N 121.1W. MAXIMUM 
SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE WINDS 
WITHIN 70 NM NE QUADRANT...50 NM SE QUADRANT...0 NM SW 
QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
180 NM NM OF CENTER WITH SEAS TO 22 FT. ELSEWHERE WITHIN 210 NM 
OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. ELSEWHERE N OF 20N 
BETWEEN 115W AND 127W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN 
MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW JOHN NEAR 27.9N 
124.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT NEAR CENTER.
SEAS 8 TO 11 FT. WITHIN 90 NM OF CENTER WINDS 20 TO 30 KT. SEAS 
8 TO 11 FT. ELSEWHERE N OF 25N BETWEEN 120W AND 130W WINDS 20 KT 
OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW JOHN NEAR 28.6N 
125.4W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST...DISSIPATED.

...TROPICAL STORM WARNING...
.TROPICAL STORM KRISTY NEAR 16.1N 130.3W 994 MB AT 1500 UTC AUG 
09 MOVING NNW OR 345 DEG AT 4 KT. MAXIMUM SUSTAINED WINDS 55 KT 
GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM NW AND SE 
QUADRANTS...40 NM NE QUADRANT AND 0 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 90 NM E SEMICIRCLE AND 30 NM W SEMICIRCLE WITH 
SEAS TO 16 FT. ELSEWHERE WITHIN 150 NM SE AND 90 NM NW 
SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
.24 HOUR FORECAST TROPICAL STORM KRISTY NEAR 18.2N 129.5W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE 
WINDS WITHIN 50 NM OF CENTER EXCEPT 30 NM SW QUADRANT. SEAS 12 
FT OR GREATER WITHIN 60 NM OF CENTER WITH SEAS TO 22 FT. 
ELSEWHERE WITHIN 150 NM S AND 120 NM N SEMICIRCLES 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 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM KRISTY NEAR 20.4N 128.6W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE 
WINDS WITHIN 40 NM OF CENTER EXCEPT 20 NM SW QUADRANT. LITTLE 
CHANGE TO RADIUS OF 12 FT SEAS WITH SEAS TO 21 FT. ELSEWHERE 
WITHIN 150 NM OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
REMAINDER OF AREA WITHIN 240 NM OF CENTER...AND ALSO N OF 20N W 
OF 125W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST POST-TROPICAL KRISTY NEAR 22.0N 128.7W.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST EXTRATROPICAL LOW KRISTY NEAR 22.0N 128.7W.
MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 HOUR FORECAST EXTRATROPICAL LOW KRISTY NEAR 22.0N 128.7W.
MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 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. 

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

CONVECTION VALID AT 1545 UTC THU AUG 09...

.TROPICAL STORM JOHN...SCATTERED MODERATE ISOLATED 
STRONG WITHIN 30 NM SE QUADRANT AND 60 NM QUADRANT. SCATTERED 
MODERATE ELSEWHERE WITHIN 60 NM OF CENTER.

.TROPICAL STORM KRISTY...SCATTERED MODERATE TO STRONG WITHIN 90 
NM NW QUADRANT AND 60 NM SW QUADRANT. SCATTERED MODERATE 
ISOLATED STRONG ELSEWHERE WITHIN 150 NM NE SEMICIRCLE AND 120 
NM SE SEMICIRCLE.

.TROPICAL WAVE AXIS ALONG 92W N OF 05N...SCATTERED MODERATE 
ISOLATED STRONG WITHIN 150 NM E AND 120 NM W OF AXIS FROM 06N TO 
09N.

.TROPICAL WAVE AXIS FROM 03N108W TO 16N107W...SCATTERED 
MODERATE ISOLATED STRONG FROM 06N TO 10N W OF WAVE TO 112W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS FROM 08N78W TO 09N94W TO 11N100W TO 09N107W 
TO 13N123W...RESUMES FROM 13N133W TO 09N140W. SCATTERED MODERATE 
TO STRONG FROM 03N TO 09N E OF 81W...AND WITHIN 180 NM S OF AXIS 
BETWEEN 81W AND 87W. SCATTERED MODERATE WITHIN 120 NM SE OF AXIS 
W OF 133W.

$$

.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.