High Seas Forecast
Issued by NWS

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000
FZNT01 KWBC 180945
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC FRI AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 18
24 HOUR FORECAST VALID 0600 UTC AUG 19
48 HOUR FORECAST VALID 0600 UTC AUG 20

.WARNINGS.

...GALE WARNING...
.POST-TROPICAL CYCLONE GERT 48N40W 996 MB MOVING NE 15 KT.
WITHIN 300 NM OF LOW EXCEPT 180 NM W QUADRANT ...AND WITHIN 240
NM E OF A FRONT FROM 44N40W TO 34N55W WINDS 25 TO 35 KT. SEAS 8
TO 16 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE GERT 52N37W 998 MB.
WITHIN 60 NM S AND 240 NM N SEMICIRCLES WINDS 25 TO 35 KT. SEAS
TO 12 FT. ELSEWHERE WITHIN 240 NM S OF A FRONT FROM 43N35W TO
35N49W WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE GERT E OF FORECAST AREA
NEAR 53N32W 998 MB. FROM 42N TO 58N BETWEEN 35W AND 44W WINDS 20
TO 30 KT. SEAS TO 12 FT.

...GALE WARNING...
.LOW 50N51W 994 MB MOVING SW 10 KT WILL TURN SE AFTER 12 HOURS.
WITHIN 240 NM N SEMICIRCLE AND 600 NM SW QUADRANT WINDS 25 TO 35
KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH NEW LOW 50N46W 998 MB.
WITHIN 300 NM NW SEMICIRCLE...AND FROM 42N TO 50N BETWEEN 40W
AND 50W WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW AND CONDITIONS ABSORBED INTO POST-TROPICAL
CYCLONE GERT DESCRIBED ABOVE.

...GALE WARNING...
.24 HOUR FORECAST FROM 61N TO 65N BETWEEN 50W AND 55W S TO SE
WINDS 25 TO 35 KT. SEAS TO 10 FT.
.48 HOUR FORECAST FROM 60N TO 64N BETWEEN 49W AND 53W S TO SE
WINDS 25 TO 35 KT. SEAS TO 10 FT.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST FROM 40N TO 45N W OF 65W WINDS TO 25 KT. SEAS
LESS THAN 8 FT.
.48 HOUR FORECAST FROM 41N TO 49N BETWEEN 58W AND 64W WINDS TO
25 KT. SEAS TO 8 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 48N
BETWEEN 35W AND 38W.
.24 HOUR FORECAST DENSE FOG E OF AREA.

.HIGH 39N69W 1018 MB MOVING NE 15 KT.
.24 HOUR FORECAST HIGH 40N61W 1018 MB.
.48 HOUR FORECAST HIGH 44N51W 1024 MB.

.FORECASTER COLLINS. 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 0600 UTC FRI AUG 18.
24 HOUR FORECAST VALID 0600 UTC SAT AUG 19.
48 HOUR FORECAST VALID 0600 UTC SUN AUG 20.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM HARVEY NEAR 13.1N 59.1W 1004 MB AT 0900 UTC AUG
18 MOVING W OR 270 DEG AT 16 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 50 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 13 FT.
ELSEWHERE WITHIN AREA BOUNDED BY 20N62W TO 20N54W TO 12N54W TO
12N62W TO 20N62W...INCLUDING IN ATLANTIC EXPOSURES AND
PASSAGES...
WINDS 20 TO 33 KT. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM HARVEY NEAR 13.5N 65.2W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. LITTLE CHANGE IN
RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER.
ELSEWHERE WITHIN AREA BOUNDED BY 18N68W TO 18N63W TO 13N63W TO
13N68W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT IN MIXED SWELL. WITHIN
AREA BOUNDED BY 21N66W TO 21N61W TO 19N61W TO 19N66W TO
21N66W...INCLUDING IN ATLANTIC EXPOSURES AND PASSAGES...NE TO E
WINDS 20 TO 25 KT. SEAS 8 FT.
.48 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.1N 72.7W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE
WINDS WITHIN 60 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12
FT OR GREATER WITHIN 75 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE
WITH SEAS TO 15 FT. ELSEWHERE WITHIN AREA BOUNDED BY
18N75W TO 18N69W TO 13N69W TO 13N75W TO 18N75W WINDS 20 TO 33
KT. SEAS 8 TO 12 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM HARVEY NEAR 15.0N 80.2W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HARVEY NEAR 16.5N 86.5W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST TROPICAL STORM HARVEY INLAND NEAR 17.5N
90.0W. 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.

.ATLC LOW PRES NEAR 16N48W 1010 MB. WITHIN AREA BOUNDED BY
22N53W TO 22N43W TO 16N43W TO 16N53W TO 22N53W E WINDS 20 TO 25
KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
16N54W 1011 MB. WITHIN AREA BOUNDED BY 23N58W TO 23N50W TO 17N50W
TO 17N58W TO 23N58W E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
19.5N63W 1012 MB. WITHIN AREA BOUNDED BY 24N66W TO 24N58W TO
19N58W TO 19N66W TO 24N66W E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.

.ATLC WITHIN AREA BOUNDED BY 21N37W TO 21N35W TO 16N35W TO
16N37W TO 21N37W WINDS 20 KT OR LESS. SEAS 8 FT IN E SWELL.
.24 HOUR FORECAST WITHIN AREA BOUNDED BY 20N43W TO 20N35W TO
14N35W TO 14N43W TO 20N43W E WINDS 20 TO 25 KT. SEAS 8 FT.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY 22N53W TO 22N42W TO
16N42W TO 16N53W TO 22N53W E WINDS 20 TO 30 KT. SEAS 8 TO 9 FT.

.ATLC 42 HOUR FORECAST WITHIN AREA BOUNDED BY 21N74W TO 21N71W
TO 20N71W TO 20N74W TO 21N74W...INCLUDING APPROACH TO WINDWARD
PASSAGE... E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY 21N75W TO 21N72W TO
20N72W TO 20N75W TO 21N75W...INCLUDING APPROACH TO WINDWARD
PASSAGE... E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

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

CONVECTION VALID AT 0900 UTC FRI AUG 18...

.TROPICAL STORM HARVEY...NUMEROUS MODERATE SCATTERED STRONG FROM
11N TO 15N BETWEEN 59W AND 62W.

.LOW PRES NEAR 16N48W...FROM 15N TO 20N BETWEEN 45W AND 50W.

.TROPICAL WAVE FROM 23N72W TO 12N73W. SCATTERED MODERATE ATLC
FROM 22N TO 24N BETWEEN 69W AND 72W. SCATTERED MODERATE ISOLATED
STRONG WINDWARD PASSAGE FROM 17N TO 19N BETWEEN 74W AND 76W.

.SCATTERED MODERATE CARIBBEAN S OF 12N W OF 80W.


$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.


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