853 
FZPN03 KNHC 181632
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC WED AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC WED AUG 18.
24 HOUR FORECAST VALID 1200 UTC THU AUG 19.
48 HOUR FORECAST VALID 1200 UTC FRI AUG 20.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE LINDA NEAR 18.2N 131.8W 975 MB AT 1500 UTC AUG 18
MOVING W OR 280 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 90 KT
GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM N
SEMICIRCLE...70 NM SE QUADRANT AND 60 NM SW QUADRANT.  SEAS 12
FT OR GREATER WITHIN 150 NM OF CENTER WITH SEAS TO 30 FT. 
ELSEWHERE 17N130W TO 17N132W TO 19N134W TO 21N132W TO 19N129W TO 
17N130W E WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF 
AREA...WITHIN 16N127W TO 12N132W TO 17N137W TO 22N136W TO 21N127W
TO 16N127W WINDS 20 KT OR LESS. SEAS 8 TO 10 IN MIXED SWELL. 
.24 HOUR FORECAST HURRICANE LINDA NEAR 19.7N 136.9W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 70 NM N SEMICIRCLE AND 50 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 120 NM OF CENTER WITH SEAS TO 25 FT. ELSEWHERE 
WITHIN 19N136W TO 20N139W TO 22N139W TO 23N137W TO 21N135W TO 
19N136W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF 
AREA...WITHIN 17N133W TO 16N138W TO 18N140W TO 25N140W TO 24N133W
TO 17N133W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. 
.48 HOUR FORECAST TROPICAL STORM LINDA NEAR 20.8N 142.9W. 
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. LITTLE CHANGE TO 
RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER. 
OVER FORECAST WATERS...WITHIN 23N137W TO 20N139W TO 20N140W TO 
28N140W TO 26N138W TO 23N137W WINDS 20 KT OR LESS. SEAS 8 TO 10 
FT IN MIXED SWELL SWELL.
.72 HOUR FORECAST POST-TROPICAL LINDA NEAR 21.6N 148.0W. MAXIMUM
SUSTAINED WINDS 40 KT GUSTS 50 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL LINDA NEAR 22.6N 152.5W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL LINDA NEAR 23.5N 157.3W. 
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 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.

.WITHIN 07N96W TO 07N112W TO 13N112W TO 14N109W TO 12N95W TO
07N96W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN SW SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
8 FT IN SW SWELL.

.WITHIN 30N112W TO 29N114W TO 30N115W TO 32N115W TO 31N113W TO
30N112W...INCLUDING GULF OF CALIFORNIA... S WINDS 20 TO 25 KT.
SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.

.18 HOUR FORECAST WITHIN 29.5N124.5W TO 29.5N126.5W TO 30N128.5W
TO 30N123W TO 29.5N124.5W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT
IN S TO SW SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 28N125W TO 27N128W TO 28N131W TO
30N133W TO 30N123W TO 28N125W WINDS 20 KT OR LESS. SEAS 8 TO 10
FT IN N SWELL.

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

CONVECTION VALID AT 1500 UTC WED AUG 18...

HURRICANE LINDA...NUMEROUS MODERATE AND SCATTERED STRONG WITHIN 
120 NM OF THE CENTER OF LINDA.

TROPICAL WAVE ALONG 91W...SCATTERED MODERATE ISOLATED STRONG 
FROM 09N-12N BETWEEN 87W-93W.

TROPICAL WAVE ALONG 103W...SCATTERED MODERATE CONVECTION NORTH 
OF 11N BETWEEN 90W-94W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 08N78W TO 07N81W TO A 1009 MB LOW
PRESSURE AT 14N99W TO 10N140W. ASIDE FROM THE CONVECTION 
DESCRIBED IN THE TROPICAL WAVE SECTIONS, NO SIGNIFICANT 
CONVECTION IS EVIDENT ALONG THE MONSOON TROUGH AT THIS TIME.

$$
.FORECASTER LANDSEA. NATIONAL HURRICANE CENTER.