448
FZNT01 KWBC 201624
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC TUE APR 20 2021

CCODE/1:31:04:01:00/AOE/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

METAREA IV BULLETIN WILL ONLY BE BROADCAST FROM THE INMARSAT
AOE SATELLITE. PLEASE ENSURE YOUR RECEIVER IS POINTED
CORRECTLY.

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH
ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP
(ALL LOWERCASE).

SECURITE

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

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 1200 UTC APR 20.
24 HOUR FORECAST VALID 1200 UTC APR 21.
48 HOUR FORECAST VALID 1200 UTC APR 22.

.WARNINGS.

...STORM WARNING...
.LOW 53N40W 992 MB MOVING W 15 KT. WITHIN 240 NM NE...BETWEEN 360
NM AND 480 NM W AND WITHIN 180 NM N QUADRANTS WINDS 35 TO 50 KT.
SEAS 14 TO 20 FT. ELSEWHERE WITHIN 360 NM NE...600 NM W...AND 300
NM N QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 18 FT IN MIXED
SWELL.
.24 HOUR FORECAST LOW 53N51W 992 MB. WITHIN 300 NM S...180 NM
W...AND 360 NM N QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 18 FT IN
MIXED SWELL.
.48 HOUR FORECAST LOW ABSORBED. CONDITIONS DESCRIBED BELOW WITH
LOW 57N38W.

...STORM WARNING...
.12 HOUR FORECAST NEW LOW 56N47W 991 MB. WITHIN 300 NM NE AND 240
NM N QUADRANTS WINDS 30 TO 45 KT. SEAS 13 TO 21 FT.
.24 HOUR FORECAST LOW 58N42W 993 MB. WITHIN 120 NM NW OF A LINE
FROM 60N40W TO 58N43W TO 57N47W WINDS 35 TO 50 KT. SEAS 14 TO 23
FT.
.48 HOUR FORECAST LOW 57N38W 993 MB. WITHIN 180 NM NW AND N OF A
LINE FROM 64N35W TO 62N38W TO 58N42W WINDS 40 TO 55 KT. SEAS 18
TO 28 FT. ELSEWHERE WITHIN 600 NM NE AND WITHIN 300 NM NW
QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 23 FT IN MIXED SWELL.

...GALE WARNING...
.LOW 49N50W 984 MB MOVING E 20 KT. BETWEEN 120 NM AND 720 NM SE
AND WITHIN 300 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 20
FT...HIGHEST NW AND N QUADRANTS.
.24 HOUR FORECAST LOW 51N39W 986 MB. WITHIN 300 NM SE AND 240 NM
SW QUADRANTS WINDS 25 TO 40 KT. SEAS 9 TO 18 FT. ELSEWHERE FROM
45N TO 50N BETWEEN 35W AND 54W WINDS 20 TO 30 KT. SEAS 8 TO 15 FT
IN MIXED SWELL.
.48 HOUR FORECAST LOW DISSIPATED. CONDITIONS DESCRIBED ABOVE WITH
LOW 57N38W.

...GALE WARNING...
.LOW 37N63W 1006 MB MOVING NE 40 KT. WITHIN 360 NM S...300 NM
SW...AND 60 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW 40N37W 1000 MB. BETWEEN 120 NM AND 420 NM S
AND 60 NM AND 420 NM W QUADRANTS WINDS 30 TO 45 KT. SEAS 12 TO
18 FT. ELSEWHERE WITHIN 300 NM N...540 NM S...780 NM SW AND NW
QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 14 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW E OF AREA NEAR 43N27W 984 MB. WITHIN AN
AREA BOUNDED BY A LINE FROM 34N35W TO 47N44W TO 54N49W TO 52N42W
TO 47N35W TO 34N35W WINDS 25 TO 35 KT. SEAS 8 TO 18 FT IN MIXED
SWELL.

...GALE WARNING...
.LOW 36N54W 1004 MB MOVING NE 40 KT. WITHIN 120 NM S...360 NM W
AND 120 NM NW QUADRANTS WINDS 30 TO 45 KT. SEAS 12 TO 21 FT.
ELSEWHERE FROM 37N TO 41N BETWEEN 35W AND 49W AND WITHIN 300 NM
SE...420 NM SW...AND 180 NM NW QUADRANTS WINDS 25 TO 35 KT. SEAS
9 TO 16 FT IN MIXED SWELL.
.24 HOUR FORECAST LOW E OF AREA 40N33W 999 MB. BETWEEN 180 NM AND
540 NM SW QUADRANT WINDS 30 TO 45 KT. SEAS 12 TO 21 FT. ELSEWHERE
FROM 31N TO 39N BETWEEN 35W AND 50W WINDS 20 TO 30 KT. SEAS 8 TO
15 FT IN MIXED SWELL.
.48 HOUR FORECAST LOW ABSORBED E OF AREA. CONDITIONS DESCRIBED
ABOVE WITH LOW 43N27W.

...GALE WARNING...
.36 HOUR FORECAST LOW INLAND NEAR 44N70W 995 MB. WITHIN 300 NM
NE...600 NM SE AND 900 NM SW WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW INLAND NEAR 47N67W 984 MB. WITHIN 240 NM
N...360 NM NE...960 NM S AND 840 NM SW QUADRANTS WINDS 25 TO 40
KT. SEAS 10 TO 16 FT IN MIXED SWELL. ELSEWHERE FROM 31N TO 51N
BETWEEN 50W AND 76W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST FROM 60N TO 66N BETWEEN 50W AND 56W WINDS 20 TO
30 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST CONDITIONS IMPROVED.

.DENSE FOG WITH VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 56N
BETWEEN 45W AND 56W...AND N OF A LINE FROM 63N51W TO 61N53W.
.24 HOUR FORECAST DENSE FOG FROM 45N TO 53N BETWEEN 46W AND
52W...AND FROM 56N TO 59N BETWEEN 42W AND 51W. ALSO FROM E OF
GREENLAND FROM 62N TO 64W W BETWEEN 38W AND 40W.
.48 HOUR FORECAST DENSE FOG FROM 42N TO 48N BETWEEN 59W AND
68W INCLUDING THE GULF OF ST LAWRENCE...AND FROM 54N TO 58N
BETWEEN 44W AND 50W. ALSO FROM E OF GREENLAND FROM 58N TO 65W
BETWEEN 35W AND 40W.

.LIGHT TO MODERATE FREEZING SPRAY N OF A LINE FROM 65N53W TO
61N589W.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF A LINE
FROM 66N54W TO 63N57W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF A LINE
FROM 64N57W TO 64N52W.

HIGH 36N75W 1019 MB MOVING E 25 KT.
.24 HOUR FORECAST HIGH 36N64W 1022 MB.
.48 HOUR FORECAST HIGH 33N43W 1026 MB.

.HIGH 60N61W 1019 MB MOVING NE 10 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.24 HOUR FORECAST NEW HIGH 34N57W 1024 MB.
.48 HOUR FORECAST HIGH MERGED 33N43W 1026 MB.

.FORECASTER FUTTERMAN. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

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

SYNOPSIS VALID 1200 UTC TUE APR 20.
24 HOUR FORECAST VALID 1200 UTC WED APR 21.
48 HOUR FORECAST VALID 1200 UTC THU APR 22.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC COLD FRONT FROM 31N70W TO 27N81W. WINDS 20 KT OR LESS.
SEAS LESS THAN 8 FT. WINDS AND SEAS HIGHER IN AND NEAR SCATTERED
SHOWERS AND TSTMS WITHIN 180 NM S OF FRONT BETWEEN 68W AND 75W
AND ALSO FROM 27N TO 30N W OF 76W.
.12 HOUR FORECAST STATIONARY FRONT ALONG 30N BETWEEN 63W AND 75W
AND COLD FRONT FROM 30N78W TO 28N80W. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT. SCATTERED SHOWERS AND TSTMS ALONG AND SE OF COLD
FRONT TO 76W AND ALSO ALONG AND NEAR STATIONARY FRONT.
.24 HOUR FORECAST STATIONARY FRONT TO LIFT N OF AREA AS A WARM
FRONT. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC 24 HOUR FORECAST COLD FRONT FROM 31N77W TO 26N80W. WITHIN
30N73W TO 29N73W TO 29N75W TO 31N75W TO 31N73W TO 30N73W SW
WINDS 20 TO 25 KT. SEAS TO 8 FT. SCATTERED SHOWERS AND TSTMS
WITHIN 180 NM E OF FRONT N OF 26N.
.48 HOUR FORECAST COLD FRONT FROM 31N67W TO 23N79W. WINDS 20 KT
OR LESS. SEAS LESS THAN 8 FT.

.ATLC WITHIN 07N50W TO 11N60W TO 16N56W TO 18N47W TO 13N53W TO
07N50W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE TO E SWELL.
.24 HOUR FORECAST WITHIN 15N58W TO 14N57W TO 15N60W TO 17N61W TO
17N59W TO 15N58W WINDS 20 KT OR LESS. SEAS TO 8 FT IN DECAYING
E SWELL.
.48 HOUR FORECAST WITHIN 07N51W TO 07N52W TO 08N52W TO 09N50W TO
08N50W TO 07N51W WINDS 20 KT OR LESS. SEAS TO 8 FT IN DECAYING
E SWELL.

.ATLC 36 HOUR FORECAST WITHIN 30N35W TO 30N39W TO 31N41W TO
31N35W TO 30N35W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST WITHIN 31N35W TO 29N35W TO 29N39W TO 31N41W TO
31N40W TO 31N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW
SWELL.

.CARIBBEAN WITHIN 12N70W TO 11N76W TO 13N77W TO 16N77W TO 16N75W
TO 12N70W E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST WITHIN 11N71W TO 11N77W TO 14N77W TO 15N74W TO
13N70W TO 11N71W E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
ELSEWHERE...WITHIN 12N70W TO 11N77W TO 16N80W TO 16N77W TO
15N72W TO 12N70W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN E SWELL.
.48 HOUR FORECAST WITHIN 12N74W TO 11N76W TO 11N77W TO 12N76W TO
12N74W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.

.CARIBBEAN 12 HOUR FORECAST WITHIN 16N85W TO 16N86W TO 16N87W TO
17N87W TO 17N85W TO 16N85W...INCLUDING THE GULF OF HONDURAS...E
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST WITHIN 16N85W TO 16N86W TO 16N87W TO 17N87W TO
17N85W TO 16N85W...INCLUDING THE GULF OF HONDURAS...E WINDS 20
TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.GULF OF MEXICO S OF 26N E OF 86W. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT. WINDS AND SEAS HIGHER IN AND NEAR SCATTERED
SHOWERS AND TSTMS.
.24 HOUR FORECAST CONDTIONS TO IMPROVE. WINDS 20 KT OR LESS.
SEAS LESS THAN 8 FT.

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


.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.

$$