High Seas Forecast
Issued by NWS

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000
FZNT01 KWBC 190424 CCA
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 19
24 HOUR FORECAST VALID 0000 UTC AUG 20
48 HOUR FORECAST VALID 0000 UTC AUG 21

.WARNINGS.

...GALE WARNING...
.POST-TROPICAL CYCLONE GERT 52N37W 1000 MB MOVING NE 10 KT. OVER
FORECAST WATERS FROM 50N TO 55N E OF 40W AND WITHIN 120 NM SE OF
A FRONT FROM 45N35W TO 38N46W WINDS 25 TO 35 KT. SEAS 8 TO 13
FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE GERT E OF AREA NEAR
54N31W 1000 MB. BETWEEN 300 NM AND 720 NM SW AND 180 NM AND 360
NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE GERT E OF AREA NEAR
54N26W 1004 MB. FROM 49N TO 56N E OF 37W WINDS TO 25 KT. SEAS TO
11 FT.

...GALE WARNING...
.LOW 50N44W 1000 MB MOVING NE 20 KT. WITHIN 240 NM N
SEMICIRCLE...AND 480 NM SE AND 540 NM SW QUADRANTS WINDS 25 TO
35 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY
POST-TROPICAL CYCLONE GERT DESCRIBED ABOVE.

...GALE WARNING...
.OVER FORECAST WATERS E OF A LINE FROM 67N56W TO 63N53W TO
62N50W AREA OF S WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST N OF A LINE FROM 60N52W TO 61N50W AREA OF SE
TO S WINDS 25 TO 40 KT. SEAS TO 12 FT.
.48 HOUR FORECAST WITHIN 60 NM SE OF A LINE FROM 64N39W TO
60N43W AREA OF S TO SW WINDS TO 25 KT. SEAS TO 8 FT.

.SYNOPSIS AND FORECAST.

.OVER FORECAST WATERS W OF A LINE FROM 44N67W TO 36N73W AREA OF
S WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST INLAND LOW 48N79W 1000 MB. WITHIN 660 NM NE
AND 960 NM SE QUADRANTS WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST INLAND LOW 57N65W 996 MB. WITHIN 540 NM NE AND
900 NM SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 10 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM OVER FORECAST
WATERS FROM 42N TO 46N E OF 37W.
.24 HOUR FORECAST DENSE FOG E OF AREA.

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM
WITHIN 120 NM NE OF A LINE FROM 58N61W TO 52N54W.

.HIGH 43N63W 1018 MB MOVING NE 20 KT.
.24 HOUR FORECAST HIGH 45N52W 1025 MB.
.48 HOUR FORECAST HIGH 45N46W 1027 MB.

.HIGH 65N36W 1021 MB MOVING S 05 KT.
.24 HOUR FORECAST HIGH 63N36W 1018 MB.
.48 HOUR FORECAST HIGH E OF AREA.

.24 HOUR FORECAST NEW HIGH 59N45W 1019 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.24 HOUR FORECAST HIGH 32N42W 1025 MB.
.48 HOUR FORECATS HIGH 32N52W 1025 MB

.FORECASTER BELL. 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 0000 UTC SAT AUG 19.
24 HOUR FORECAST VALID 0000 UTC SUN AUG 20.
48 HOUR FORECAST VALID 0000 UTC MON AUG 21.

.WARNINGS.

...CARIBBEAN TROPICAL STORM WARNING...
.TROPICAL STORM HARVEY NEAR 13.7N 64.1W 1005 MB AT 0300 UTC AUG
19 MOVING W OR 275 DEG AT 16 KT. MAXIMUM SUSTAINED WINDS 35 KT
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM N
SEMICIRCLE AND 0 NM S SEMICIRCLE.  SEAS TO 12 FT WITHIN 0 NM S
SEMICIRCLE...60 NM NE QUADRANT AND 45 NM NW QUADRANT. ELSEWHERE
WITHIN 300 NM N SEMICIRCLE AND 60 NM SE QUADRANT WINDS 20 TO 33
KT. SEAS 8 TO 10 FT. ATLC WATERS AND PASSAGES ELSEWHERE FROM 15N
TO 20N BETWEEN 59W AND 63W WINDS 20 KT OR LESS. SEAS TO 9 FT IN
E SWELL. SCATTERED TO NUMEROUS TSTMS FROM 11N TO 15N BETWEEN
63.5W AND 68W.
.24 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.3N 70.4W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. LITTLE CHANGE IN
RADIUS OF TROPICAL STORM FORCE WINDS. SEAS 12 FT OR GREATER
WITHIN 90 NM NE QUADRANT...30 NM SE QUADRANT...0 NM SW QUADRANT
AND 45 NM NW QUADRANT WITH SEAS TO 16 FT. ELSEWHERE WITHIN 240
NM N SEMICIRCLE AND 150 NM SE QUADRANT WINDS 20 TO 33 KT. SEAS 8
TO 11 FT.
.48 HOUR FORECAST TROPICAL STORM HARVEY NEAR 14.8N 78.1W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. LITTLE CHANGE IN
RADIUS OF TROPICAL STORM FORCE WINDS. SEAS 12 FT OR GREATER
WITHIN 120 NM NE QUADRANT...75 NM SE QUADRANT...30 NM SW
QUADRANT AND 60 NM NW QUADRANT WITH SEAS TO 21 FT. ELSEWHERE
WITHIN 270 NM NE AND 75 NM SW SEMICIRCLES WINDS 20 TO 33 KT.
SEAS 8 TO 11 FT.
.72 HOUR FORECAST TROPICAL STORM HARVEY NEAR 16.5N 84.7W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HARVEY INLAND NEAR 18.0N 89.5W.
MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT.
.120 HOUR FORECAST TROPICAL STORM HARVEY OVER WATER NEAR 19.0N
92.5W. 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 LOW PRES NEAR 19N54.5W 1012 MB MOVING NW 18 KT. WITHIN 270
NM NE SEMICIRCLE WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. SCATTERED
TSTMS WITHIN 150 NM NE SEMICIRCLE.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
21N62.5W 1012 MB. WITHIN 240 NM NE SEMICIRCLE WINDS 20 TO 25 KT.
SEAS 8 TO 10 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
22N70W 1013 MB. WITHIN 180 NM N SEMICIRCLE WINDS 20 TO 25 KT.
SEAS TO 9 FT. FROM 19.5N TO 22N BETWEEN 71W AND 77W...INCLUDING
APPROACH TO WINDWARD PASSAGE...NE TO E WINDS 20 TO 25 KT. SEAS
LESS THAN 8 FT.

.ATLC FROM 13.5N TO 20N BETWEEN 35W AND 38.5W WINDS 20 KT OR
LESS. SEAS TO 9 FT IN MIXED NE AND S SWELL.
.24 HOUR FORECAST FROM 17N TO 22N BETWEEN 41W AND 50W WINDS 20
TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST FROM 19.5N TO 23.5N BETWEEN 48W AND 54W WINDS
20 TO 25 KT. SEAS 8 TO 10 FT.

.ATLC WITHIN AREA BOUNDED BY 21N73W TO 21N70.5W TO 20N70.5W TO
20N73W TO 21N73W...INCLUDING APPROACH TO WINDWARD PASSAGE...E
WINDS 20 TO 25 KT. SEAS TO 8 FT.
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN AREA BOUNDED BY 21N74W TO 21N70.5W TO
20N70.5W TO 20N74W...INCLUDING APPROACH TO WINDWARD PASSAGE...
NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST CONDITIONS TO MERGE WITH POSSIBLE TROPICAL
CYCLONE ABOVE.

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

$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.



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