000
FZPN03 KNHC 192121
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC THU AUG 19 2021

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 THU AUG 19.
24 HOUR FORECAST VALID 1800 UTC FRI AUG 20.
48 HOUR FORECAST VALID 1800 UTC SAT AUG 21.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM LINDA NEAR 19.7N 139.5W 1005 MB AT 2100 UTC AUG 
19 MOVING W OR 275 DEG AT 15 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 70 NM N 
SEMICIRCLE AND 50 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 
90 NM NW AND SE QUADRANTS...150 NM NE QUADRANT AND 75 NM SW 
QUADRANT WITH SEAS TO 24 FT. ELSEWHERE FROM 18N TO 24N W OF 135W 
WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER OF THE AREA FROM 
15N TO 27N AND W OF A LINE FROM 27N134W TO 21N133W TO 15N138W TO 
15N140W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.12 HOUR FORECAST POST-TROPICAL LINDA W OF AREA NEAR 19.9N 
141.8W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW LINDA W OF AREA NEAR 
20.2N 144.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. WINDS 
20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW LINDA NEAR 20.8N 
149.5W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. 
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW LINDA NEAR 21.5N 
153.9W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL REMNANT LOW LINDA NEAR 22.0N 
158.4W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
.120 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.

.N OF 27N BETWEEN 121W AND 135W WINDS 20 KT OR LESS. SEAS 8 TO 9 
FT IN MIXED N AND SW SWELL.
.24 HOUR FORECAST N OF 28N BETWEEN 126W AND 136W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN N TO NE SWELL.
.48 HOUR FORECAST N OF 27N BETWEEN 124W AND 138W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN N TO NE SWELL.

.SE OF A LINE FROM 12N134W TO 09N140W TO ANOTHER LINE FROM 
10N133W TO 06N140W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN SW 
SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 09N TO 12N BETWEEN 110W AND 114W WINDS 20 KT OR LESS. SEAS 
8 TO 9 FT IN SW SWELL. FROM 09N TO 12N BETWEEN 105W AND 108W 
WINDS 20 KT OR LESS. SEAS 8 FT IN SW SWELL.
.24 HOUR FORECAST FROM 10N TO 13N BETWEEN 105W AND 111W...AND 
FROM 10N TO 12N BETWEEN 111W AND 114W WINDS 20 KT OR LESS. SEAS 
8 TO 9 FT IN SW SWELL.
.48 HOUR FORECAST FROM 11N TO 14N BETWEEN 103W AND 107W...AND 
FROM 11N TO 13N BETWEEN 110W AND 115W WINDS 20 KT OR LESS. SEAS 
8 FT IN SW SWELL.

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

CONVECTION VALID AT 2100 UTC THU AUG 19... 

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS ACROSS WESTERN PANAMA TO 09N90W TO 
1011 MB LOW PRESSURE LOCATED NEAR 16N103W TO 11N115W TO 13N130W 
TO 10N140W. ASIDE FROM THE CONVECTION DESCRIBED IN THE TROPICAL 
WAVES SECTION...SCATTERED MODERATE CONVECTION IS NOTED FROM 03N 
TO 07N E OF 81W TO THE COAST OF COLOMBIA...AND FROM 09N TO 12N W 
OF 133W. 

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.