000
FZPN03 KNHC 282210
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC FRI AUG 28 2020

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC FRI AUG 28.
24 HOUR FORECAST VALID 1800 UTC SAT AUG 29.
48 HOUR FORECAST VALID 1800 UTC SUN AUG 30.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM ISELLE NEAR 18.8N 115.2W 999 MB AT 2100 UTC AUG
28 MOVING NNE OR 020 DEG AT 6 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM S
SEMICIRCLE...50 NM NE QUADRANT AND 40 NM NW QUADRANT.  SEAS 12
FT OR GREATER WITHIN 60 NM NE AND SW QUADRANTS...AND 90 NM SE 
QUADRANT WITH SEAS TO 18 FT. ELSEWHERE FROM 12N TO 19N BETWEEN 
110W AND 118W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF 
AREA FROM 12N TO 21N E OF 118W WINDS 20 KT OR LESS. SEAS 8 TO 11 
FT IN SW SWELL.
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 21.0N 114.7W. 
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE 
WINDS WITHIN 40 NM E SEMICIRCLE AND 20 NM W SEMICIRCLE. SEAS 12 
FT OR GREATER WITHIN 60 NM IN E SEMICIRCLE WITH SEAS TO 13 FT.
ELSEWHERE WITHIN 120 NM OF THE CENTER WINDS 20 TO 33 KT. SEAS 10
TO 12 FT. REMAINDER OF AREA FROM 15N TO 22N BETWEEN 109W AND 
115W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN SW SWELL.
.36 HOUR FORECAST TROPICAL DEPRESSION ISELLE NEAR 22.6N 115.0W. 
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW ISELLE NEAR 23.7N 
115.7W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 30 NM
IN E SEMICIRCLE WINDS 20 TO 25 KT. SEAS TO 8 FT.
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW ISELLE NEAR 25.1N 
117.0W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 25 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST...DISSIPATED.

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.

.POST-TROPICAL CYCLONE HERNAN NEAR 23.2N 110.1W 1008 MB AT 2100
UTC AUG 28 MOVING W OR 280 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS
25 KT GUSTS 35 KT. FROM 21N TO 24N BETWEEN 106W TO 110W WINDS 20
TO 25 KT. SEAS 8 TO 9 FT.
.12 HOUR FORECAST POST-TROPICAL REMNANT LOW HERNAN NEAR 23.3N 
111.8W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT.
.24 HOUR FORECAST...DISSIPATED.

.12 HOUR FORECAST WITHIN 27N110W TO 27N111W TO 30N115W TO
31N113W TO 29N112W TO 27N110W...INCLUDING GULF OF CALIFORNIA...
SE TO S WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 27N110W TO 27N111W TO 30N115W TO
31N113W TO 29N112W TO 27N110W...INCLUDING GULF OF CALIFORNIA...
SE TO S WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.42 HOUR FORECAST CONDITIONS IMPROVE. 

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

CONVECTION VALID AT 2100 UTC FRI AUG 28...

.TROPICAL STORM ISELLE...SCATTERED MODERATE AND ISOLATED STRONG
WITHIN 150 NM IN W SEMICIRCLE.

.POST-TROPICAL CYCLONE HERNAN...SCATTERED MODERATE CONVECTION 
FROM 18NTO 21N BETWEEN 117W AND 123W.

.TROPICAL WAVE ALONG 96W...SCATTERED MODERATE FROM 14N TO 17N 
BETWEEN 95W AND 98W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EMERGES OFF OF CENTRAL AMERICA NEAR 12N86W TO 
17100W. IT RESUMES AT 13N124W TO BEYOND 13N140W. SCATTERED 
MODERATE FROM 07N TO 12N WEST OF 135W AND NORTH OF 07N EAST OF 
87W. 

$$
.FORECASTER LANDSEA. NATIONAL HURRICANE CENTER.