High Seas Forecast
Issued by NWS

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000
FZPN03 KNHC 220248
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC SAT JUL 22 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 0000 UTC SAT JUL 22.
24 HOUR FORECAST VALID 0000 UTC SUN JUL 23.
48 HOUR FORECAST VALID 0000 UTC MON JUL 24.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM GREG NEAR 15.1N 121.8W 1001 MB AT 0300 UTC JUL
22 MOVING W OR 280 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N
SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN
90 NM N SEMICIRCLE AND 45 NM S SEMICIRCLE WITH SEAS TO 17 FT.
ELSEWHERE WITHIN 180 NM N AND 150 NM S SEMICIRCLES OF CENTER...
WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. REMAINDER OF AREA FROM 12N
TO 18N BETWEEN 118W AND 124W WINDS 20 KT OR LESS. SEAS TO 9 FT
IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM GREG NEAR 15.5N 125.7W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT. LITTLE CHANGE IN RADIUS OF
TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER.
.48 HOUR FORECAST TROPICAL STORM GREG NEAR 15.5N 130.4W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS
WITHIN 60 NM N SEMICIRCLE AND 40 NM S SEMICIRCLE. SEAS 12 FT OR
GREATER WITHIN 120 NM N AND 90 NM S SEMICIRCLES WITH SEAS TO 18
FT. ELSEWHERE WITHIN 150 NM N AND 120 NM S SEMICIRCLES WINDS 20
TO 33 KT. SEAS 8 TO 11 FT. FROM 18N TO 23N W OF 126W NE WINDS 20
TO 25 KT. SEAS 8 TO 11 FT PRIMARILY IN NE SWELL. REMAINDER OF
AREA FROM 08N TO 20N BETWEEN 124W AND 135W WINDS 20 KT OR LESS.
SEAS TO 9 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM GREG NEAR 15.8N 133.6W. MAXIMUM
SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM GREG NEAR 17.1N 136.5W. MAXIMUM
SUSTAINED WINDS 35 KT GUSTS 45 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW GREG NEAR 18.0N
139.0W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.

...HURRICANE WARNING...
.TROPICAL DEPRESSION NINE-E NEAR 9.4N 95.7W 1006 MB AT 0300 UTC
JUL 22 MOVING W OR 280 DEG AT 12 KT. MAXIMUM SUSTAINED WINDS 30
KT GUSTS 40 KT. SEAS TO 11 FT.
.12 HOUR FORECAST TROPICAL STORM NINE-E NEAR 9.7N 97.3W. MAXIMUM
SUSTAINED WINDS 40 KT GUSTS 50 KT.
.24 HOUR FORECAST TROPICAL STORM NINE-E NEAR 10.7N 99.3W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM NE QUADRANT...40 NM SE QUADRANT...30 NM SW
QUADRANT...AND 50 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
60 NM OF CENTER...EXCEPT 45 NM SW QUADRANT WITH SEAS TO 18 FT.
ELSEWHERE WITHIN 120 NM OF CENTER...EXCEPT 60 NM SW QUADRANT
WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. REMAINDER OF THE AREA FROM
05N TO 08N BETWEEN 93W AND 100W S TO SW WINDS 20 TO 25 KT. SEAS
TO 9 FT.
.48 HOUR FORECAST HURRICANE NINE-E NEAR 12.8N 102.5W. MAXIMUM
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS
WITHIN 100 NM NE QUADRANT...70 NM SE QUADRANT...60 NM SW
QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
90 NM OF CENTER...EXCEPT 120 NM NE QUADRANT WITH SEAS TO 28 FT.
ELSEWHERE WITHIN 120 NM OF CENTER...EXCEPT 150 NM NE QUADRANT
WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.72 HOUR FORECAST HURRICANE NINE-E NEAR 15.0N 105.5W. MAXIMUM
SUSTAINED WINDS 80 KT GUSTS 100 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE NINE-E NEAR 16.5N 108.5W. MAXIMUM
SUSTAINED WINDS 90 KT GUSTS 110 KT.
.120 HOUR FORECAST HURRICANE NINE-E NEAR 18.0N 112.0W. MAXIMUM
SUSTAINED WINDS 95 KT GUSTS 115 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.

.TROPICAL STORM FERNANDA W OF AREA. FROM 10N TO 21N W OF 138W
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.12 HOUR FORECAST CONDITIONS MOVED W OF AREA.

.LOW PRES NEAR 11N128W 1011 MB. WITHIN 90 NM SE QUADRANT OF LOW
CENTER WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.12 HOUR FORECAST LOW PRES NEAR 11.5N127W 1011 MB. WITHIN 120 NM
SE QUADRANT OF LOW CENTER WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.24 HOUR FORECAST LOW PRES DISSIPATED. CONDITIONS MERGED WITH
GREG.

.LOW PRES NEAR 14N111W 1007 MB. WITHIN 90 NM OF CENTER...EXCEPT
75 NM NW QUADRANT OF LOW CENTER WINDS 20 TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
14N114W 1007 MB. WITHIN 90 NM OF LOW CENTER WINDS 20 TO 25 KT.
SEAS TO 10 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
14.5N116W 1006 MB. WITHIN 90 NM OF LOW CENTER WINDS 20 TO 30 KT.
SEAS 8 TO 12 FT.

.N OF 14.5N BETWEEN 94W AND 96W...INCLUDING THE GULF OF
TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS 8 FT.
.12 HOUR FORECAST LITTLE CHANGE.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.06 HOUR FORECAST FROM 10.5N TO 12N E OF 88W...INCLUDING THE
GULF OF PAPAGAYO...E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 0215 UTC SAT JUL 22...

.TROPICAL STORM GREG...SCATTERED MODERATE TO STRONG WITHIN 120
NM N QUADRANT OF CENTER.

.TROPICAL DEPRESSION NINE-E...SCATTERED MODERATE TO STRONG
WITHIN 150 NM NW SEMICIRCLE OF CENTER. AN ADDITIONAL AREA OF
STRONG CONVECTION IS NOTED FROM 11.5N TO 13.5N BETWEEN 96W AND
99W.

.LOW PRES NEAR 14N110W...SCATTERED MODERATE ISOLATED STRONG
FROM 12N TO 15N BETWEEN 109W AND 113W.

.LOW PRES NEAR 12N127W...SCATTERED MODERATE WITHIN 120 NM S
QUADRANT OF LOW CENTER.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 10N85W TO 08N93W. THE MONSOON
TROUGH BREAKS DOWN IN THE VICINITY OF T.D. NINE-E AND A SURFACE
LOW NEAR 14N111W, THEN RESUMES FROM 14N122W TO THE REMNANT LOW
OF T.D. EIGHT-E NEAR 11N128W. THE ITCZ EXTENDS FROM 11N129W TO
10N140W. EXCEPT NOTED WITH THE TROPICAL SYSTEMS DECRIBED
ABOVE...MINIMAL CONVECTION IS ASSOCIATED WITH THE TROUGH AXIS.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.



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