High Seas Forecast
Issued by NWS

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000
FZNT01 KWBC 191532
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC SAT AUG 19 2017

CCODE/1:31:04:01:00/AOW/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.
ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE
NATIONAL WEATHER SERVICE. EMAIL US AT
VOSOPS@NOAA.GOV(LOWERCASE).

ATLANTIC ICEBERG ANALYSIS AND OUTLOOK PRODUCTS...COURTESY OF
THE U.S. COAST GUARD INTERNATIONAL ICE PATROL...CAN BE FOUND
ON THE OCEAN PREDICTION CENTER WEB PAGE AT
HTTP://WWW.OPC.NCEP.NOAA.GOV/ATL_TAB.SHTML(LOWERCASE).

SECURITE

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W

SYNOPSIS VALID 1200 UTC AUG 19
24 HOUR FORECAST VALID 1200 UTC AUG 20
48 HOUR FORECAST VALID 1200 UTC AUG 21

.WARNINGS.

...GALE WARNING...
.POST-TROPICAL CYCLONE GERT 54N36W 997 MB MOVING W 10 KT WILL
TURN E. WITHIN 120 NM N SEMICIRCLE WINDS 25 TO 35 KT. SEAS 8 TO
14 FT. ELSEHWERE WITHIN 180 NM N OF A FRONT FROM 55N35W TO
53N39W TO 50N42W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE GERT E OF AREA NEAR
55N30W 1002 MB. FROM 42N TO 58N BETWEEN 35W AND 42W WINDS 20 TO
30 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE GERT AND ASSOCIATED
CONDITIONS E OF AREA.

...GALE WARNING...
.LOW 49N38W 998 MB MOVING NE 20 KT. WITHIN 180 NM S SEMCIRICLE
WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. ELSEHWERE WITHIN 240 NM SE
AND 480 NM SW QUADRANTS AND WITHIN 120 NM SE OF A FRONT FROM
42N35W TO 36N46W WINDS 20 TO 30 KT. SEAS TO 8 TO 13 FT.
.24 HOUR FORECAST LOW ABSORBED BY LOW 55N30W WITH CONDITIONS
DESCRIBED ABOVE.

...GALE WARNING...
.OVER FORECAST WATERS N OF 61N BETWEEN 50W AND 53W AREA OF SE TO
S WINDS 25 TO 35 KT. SEAS TO 9 FT.
.24 HOUR FORECAST WITHIN 60 NM E OF A LINE FROM 62N52W TO 61N51W
AREA OF SE TO S WINDS 20 TO 30 KT. SEAS TO 8 FT.
.48 HOUR FORECAST CONDITIONS ABSORBED BY LOW 58N57W 992 MB
DESCRIBED BELOW.

...GALE WARNING...
.24 HOUR FORECAST LOW 58N60W 1005 MB. WITHIN 300 NM NW QUADRANT
WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LOW 58N57W 992 MB. WITHIN 300 NM NE QUADRANT
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT. ELSEWHERE WITHIN 300 NM NW
AND W QUADRANTS AND WITHIN 240 NM E OF A LINE FROM 58N53W TO
47N52W S TO SE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.

.SYNOPSIS AND FORECAST.

.LOW 44N69W 1007 MB MOVING NE 10 KT. WITHIN 180 NM SE SEMICIRCLE
WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LOW 50N64W 1005 MB. WITHIN 120 NM E OF A LINE
FROM 50N62W TO 42N64W WINDS 20 TO 30 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST LOW DISSIPATED WITH CONDTIONS DESCRIBED WITH
LOW 58N57W ABOVE.

.LOW 36N60W 1015 MB MOVING NE 10 KT. WITHIN 180 NM NE QUADRANT
WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LOW 38N55W 1017 MB. WITHIN 240 NM NE QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.DENSE FOG. 36 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
WITHIN 180 NM NE OF A LINE FROM 59N63W TO 52N56W.
.48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 120 NM
NE OF A LINE FROM 58N61W TO 49N42W.

.HIGH 43N57W 1021 MB MOVING E 15 KT.
.24 HOUR FORECAST HIGH 44N49W 1026 MB.
.48 HOUR FORECAST HIGH 43N41W 1024 MB.

.HIGH 32N40W 1024 MB MOVING W 05 KT.
.24 HOUR FORECAST NEW HIGH 31N42W 1023 MB.
.48 HOUR FORECAST HIGH 32N49W 1024 MB

.FORECASTER SIENKIEWICZ. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 1200 UTC SAT AUG 19.
24 HOUR FORECAST VALID 1200 UTC SUN AUG 20.
48 HOUR FORECAST VALID 1200 UTC MON AUG 21.

.WARNINGS.

...CARIBBEAN TROPICAL STORM WARNING...
.TROPICAL STORM HARVEY NEAR 13.9N 68.1W 1007 MB AT 1500 UTC AUG
19 MOVING W OR 275 DEG AT 19 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 0 NM OF CENTER
EXCEPT 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 45 NM N
SEMICIRCLE AND 0 NM S SEMICIRCLE WITH SEAS TO 13 FT. ELSEWHERE
WITHIN AREA BOUNDED BY 13N66W TO 14N70W TO 16N70W TO 17N68W TO
18N66W TO 16N64W TO 13N66W...INCLUDING IN ATLANTIC
PASSAGES...WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.4N 74.9W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE. SEAS 12 FT
OR GREATER WITHIN 60 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE WITH
SEAS TO 15 FT. ELSEWHERE WITHIN AREA BOUNDED BY 12N72W TO
12N74W TO 14N76W TO 17N75W TO 18N72W TO 17N71W TO 12N72W...
INCLUDING WITHIN 90 NM OF COAST OF COLOMBIA...WINDS 20 TO 33 KT.
SEAS 8 TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM HARVEY NEAR 15.7N 82.4W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 90 NM NE QUADRANT...50 NM SE QUADRANT...40 NM SW
QUADRANT...AND 70 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 90
NM NE SEMICIRCLE AND 0 NM SW SEMICIRCLE WITH SEAS TO 17 FT.
ELSEWHERE WITHIN AREA BOUNDED BY 12N80W TO 14N82W TO 17N83W TO
19N82W TO 19N81W TO 17N77W TO 12N80W WINDS 20 TO 33 KT. SEAS 8 TO
12 FT.
.72 HOUR FORECAST TROPICAL STORM HARVEY NEAR 17.5N 88.0W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL DEPRESSION HARVEY NEAR 19.0N 91.5W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
.120 HOUR FORECAST TROPICAL STORM HARVEY NEAR 19.5N 93.5W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 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.

.ATLC WITHIN AREA BOUNDED BY 15N50W TO 18N58W TO 19N63W TO
20N64W TO 24N58W TO 22N50W TO 15N50W E TO SE WINDS 20 TO 25 KT.
SEAS 8 TO 11 FT IN MIXED SE AND NW SWELL.
.24 HOUR FORECAST WITHIN AREA BOUNDED BY 21N56W TO 19N58W TO
19N62W TO 24N67W TO 26N63W TO 25N60W TO 21N56W E TO SE WINDS 20
TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY 24N69W TO 23N70W TO
25N72W TO 26N72W TO 26N70W TO 25N69W TO 24N69W WINDS 20 KT OR
LESS. SEAS TO 8 FT IN MIXED NE AND SE SWELL.

.ATLC WITHIN AREA BOUNDED BY 14N35W TO 13N38W TO 15N50W TO
22N50W TO 23N41W TO 19N35W TO 14N35W NE TO E WINDS 20 TO 25 KT.
SEAS 8 TO 11 FT IN MIXED NE AND SE SWELL.
.24 HOUR FORECAST WITHIN AREA BOUNDED BY 17N46W TO 18N52W TO
19N54W TO 22N50W TO 22N44W TO 20N43W TO 17N46W NE TO E WINDS 20
TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY 21N50W TO 20N53W TO
22N56W TO 24N55W TO 26N52W TO 25N49W TO 21N50W NE TO E WINDS 20
TO 25 KT. SEAS 8 TO 10 FT.

.ATLC 12 HOUR FORECAST WITHIN AREA BOUNDED BY 21N73W TO 21N70W TO
20N70W TO 20N73W TO 21N73W...INCLUDING APPROACH TO WINDWARD
PASSAGE...NE TO E WINDS 20 TO 25 KT. SEAS BUILDING TO 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC 48 HOUR FORECAST WITHIN AREA BOUNDED BY 18N35W TO 20N36W
TO 21N36W TO 23N35W TO 18N35W WINDS 20 KT OR LESS. SEAS TO 8 FT
IN MIXED SWELL.

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

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.



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