000
FZPN03 KNHC 102109
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC FRI SEP 10 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 FRI SEP 10.
24 HOUR FORECAST VALID 1800 UTC SAT SEP 11.
48 HOUR FORECAST VALID 1800 UTC SUN SEP 12.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM OLAF NEAR 24.6N 112.7W 997 MB AT 2100 UTC SEP 10
MOVING WNW OR 295 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 40 KT
GUSTS 50 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM N SEMICIRCLE
AND 40 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 0 NM N 
SEMICIRCLE...60 NM SE QUADRANT AND 30 NM SW QUADRANT WITH SEAS TO
15 FT. ELSEWHERE WITHIN 23N111W TO 23N113W TO 25N113W TO 26N111W
TO 25N110W TO 23N111W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT IN 
MIXED SWELL.
.24 HOUR FORECAST POST-TROPICAL REMNANT LOW OLAF NEAR 24.7N 
114.8W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. WITHIN 25N114W
TO 24N114W TO 24N115W TO 25N115W TO 26N114W TO 25N114W WINDS 20 
TO 25 KT. SEAS 8 TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST POST-TROPICAL REMNANT LOW OLAF NEAR 23.3N 
117.0W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. WITHIN 24N117W
TO 23N118W TO 24N118W TO 24N117W NE WINDS 20 TO 25 KT. SEAS 8 TO
10 FT IN MIXED SWELL. 
.72 HOUR FORECAST POST-TROPICAL REMNANT LOW OLAF NEAR 21.4N 
119.7W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. EXTENDED 
OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. 
.96 HOUR FORECAST POST-TROPICAL REMNANT LOW OLAF NEAR 20.8N 
121.7W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT. 
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW OLAF NEAR 20.5N 
123.0W. 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.

.WITHIN 03.4S88W TO 03.4S120W TO 00N131W TO 06N124W TO 12N93W TO
03.4S88W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN S TO SW SWELL.
.24 HOUR FORECAST LOW PRESSURE NEAR 13N95W 1009 MB. WITHIN 
15N95W TO 13N97W TO 14N97W TO 16N96W TO 16N94W TO 
15N95W...INCLUDING THE GULF OF TEHUANTEPEC... NE WINDS 20 TO 25 
KT. SEAS 8 FT. ELSEWHERE WITHIN 03.4S88W TO 03.4S120W TO 00N133W 
TO 07N127W TO 14N92W TO 03.4S88W WINDS 20 KT OR LESS. SEAS 8 TO 
10 FT IN S TO SW SWELL. 
.48 HOUR FORECAST LOW PRESSURE...POSSIBLE TROPICAL CYCLONE...NEAR
14N98W 1009 MB. WITHIN 11N96W TO 10N97W TO 10N99W TO 15N97W TO 
15N96W TO 11N96W S TO SW WINDS 20 TO 25 KT. SEAS 8 TO 12 FT. 
ELSEWHERE WITHIN 03.4S81W TO 03S120W TO 15N114W TO 17N99W TO 
05N82W TO 03.4S81W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN S TO 
SW SWELL.

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

CONVECTION VALID AT 2100 UTC FRI SEP 10...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS FROM 11N86W TO 13N90W TO 13N115W. ITCZ FROM 
08N120W TO 07N130W. SCATTERED MODERATE TO ISOLATED STRONG 
FROM 05N TO 09N BETWEEN 78W AND 82W. SCATTERED MODERATE FROM 10N
TO 12N BETWEEN 91W AND 94W. SCATTERED MODERATE TO ISOLATED 
STRONG FROM 10N TO 15N BETWEEN 95W AND 97W.

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.