High Seas Forecast
Issued by NWS

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000
FZNT02 KNHC 202041
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC WED SEP 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF MEXICO

SYNOPSIS VALID 1800 UTC WED SEP 20.
24 HOUR FORECAST VALID 1800 UTC THU SEP 21.
48 HOUR FORECAST VALID 1800 UTC FRI SEP 22.

.WARNINGS.

...ATLC AND CARIBBEAN HURRICANE WARNING...
.HURRICANE MARIA NEAR 18.8N 67.3W 957 MB AT 2100 UTC SEP 20
MOVING NW OR 305 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 95 KT
GUSTS 115 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM NW AND SE
QUADRANTS...130 NM NE QUADRANT AND 100 NM SW QUADRANT.SEAS 12
FT OR GREATER WITHIN 180 NM NW AND SE QUADRANTS...240 NM NE
QUADRANT AND 150 NM SW QUADRANT WITH SEAS TO 43 FT. ELSEWHERE
WITHIN 300 NM NE AND 180 NM SW SEMICIRCLES OF CENTER WINDS 20 TO
33 KT. SEAS 10 TO 12 FT. REMAINDER ATLC WATERS S OF 31N BETWEEN
60W AND 69W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
REMAINDER CARIBBEAN WATERS N OF 13N BETWEEN 61W AND 71W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. NUMEROUS STRONG
WITHIN 120 NM OF CENTER. SCATTERED MODERATE ISOLATED STRONG FROM
16N TO 22N BETWEEN 63W AND 70W.
.24 HOUR FORECAST HURRICANE MARIA NEAR 20.5N 69.3W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS
WITHIN 120 NM NW AND SE QUADRANTS...130 NM NE QUADRANT AND 100
NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 270 NM N
SEMICIRCLE...180 NM SE AND 60 NM SW SEMICIRCLES WITH SEAS TO 51
FT. ELSEWHERE WITHIN 300 NM NE AND 180 NM SW SEMICIRCLES WINDS
20 TO 33 KT. SEAS 9 TO 11 FT. REMAINDER ATLC WATERS OUTSIDE
BAHAMAS...S OF 31N BETWEEN 62W AND 75W WINDS 20 KT OR LESS. SEAS
8 TO 11 FT PRIMARILY IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE MARIA NEAR 22.9N 71.1W. MAXIMUM
SUSTAINED WINDS 105 KT GUSTS 130 KT. TROPICAL STORM FORCE WINDS
WITHIN 140 NM E SEMICIRCLE...100 NM SW QUADRANT AND 120 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 330 NM N SEMICIRCLE...180
NM SE AND 120 NM SW QUADRANTS WITH SEAS TO 54 FT. ELSEWHERE
WITHIN 330 NM N SEMICIRCLE...210 NM SE AND 150 NM SW SEMICIRCLES
WINDS 20 TO 33 KT. SEAS 10 TO 11 FT. REMAINDER OPEN ATLC WATERS
FROM 19N TO 31N BETWEEN 60W AND 80W WINDS 20 KT OR LESS. SEAS 8
TO 11 FT IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE MARIA NEAR 25.8N 72.2W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE MARIA NEAR 29.0N 72.5W. MAXIMUM
SUSTAINED WINDS 90 KT GUSTS 110 KT.
.120 HOUR FORECAST HURRICANE MARIA NEAR 31.5N 72.0W. MAXIMUM
SUSTAINED WINDS 80 KT GUSTS 100 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

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.

.LOW PRES...REMNANT OF LEE...NEAR 18.5N47W 1009 MB. WITHIN 240
NM NE SEMICIRCLE E TO SE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.
SCATTERED MODERATE ISOLATED STRONG FROM 17N TO 20N BETWEEN 41W
AND 46W.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
22N48W 1012 MB. WITHIN 120 NM NE SEMICIRCLE E TO SE WINDS 20 TO
25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST LOW PRES NEAR 28N50W 1015 MB. WINDS 20 KT OR
LESS. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.


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