288
FZNT24 KNHC 212059
OFFNT4
OFFSHORE WATERS FORECAST FOR THE GULF OF AMERICA
NWS NATIONAL HURRICANE CENTER MIAMI, FL
459 PM EDT TUE JUL 21 2026
OFFSHORE WATERS FORECAST FOR THE GULF OF AMERICA
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.
GMZ001-220900-
SYNOPSIS FOR THE GULF OF AMERICA
459 PM EDT TUE JUL 21 2026
SYNOPSIS
TROPICAL STORM BERTHA IS NEAR 29.4N 87.2W AT 5 PM EDT, AND IS
MOVING NORTHWEST AT 5 KT. MAXIMUM SUSTAINED WINDS ARE 50 KT WITH
GUSTS TO 60 KT, AND THE MINIMUM CENTRAL PRESSURE IS 995 MB.
BERTHA WILL WEAKEN SLIGHTLY AS IT MOVES TOWARD SOUTHEAST
LOUISIANA OVERNIGHT, REACHING 29.6N 87.9W BY WED MORNING, 29.5N
89.3W BY WED AFTERNOON, AND 29.3N 91.4W BY THU MORNING. BERTHA
WILL WEAKEN FURTHER AS IT MOVES ALONG THE COAST OF LOUISIANA,
REACHING 29.4N 93.4W THU AFTERNOON, THEN MOVING INLAND AND
WEAKENING TO A TROPICAL DEPRESSION NEAR 29.8N 95.6W BY FRI
MORNING. THE REMNANT LOW OF BERTHA WILL CONTINUE INLAND REACHING
30.3N 97.6W BY FRI AFTERNOON. BERTHA WILL DISSIPATE SAT AFTERNOON.
SWELLS GENERATED BY BERTHA ARE AFFECTING PORTIONS OF THE GULF
COAST OF FLORIDA AND ARE LIKELY TO SPREAD WESTWARD DURING THE REST
OF THE WEEK. ELSEWHERE, WEAK HIGH PRESSURE OVER THE WESTERN GULF
WILL DISSIPATE BY MIDWEEK. AFTER MIDWEEK, ATLANTIC HIGH PRESSURE
WILL EXTEND WESTWARD TO THE CENTRAL GULF FOLLOWING BERTHA.
GMZ040-220900-
NW GULF OF AMERICA INCLUDING STETSON BANK-
459 PM EDT TUE JUL 21 2026
TONIGHT
S TO SW WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
WED
S OF 27N, SW WINDS 10 TO 15 KT IN THE MORNING, BECOMING
VARIABLE LESS THAN 5 KT. N OF 27N, SW TO W WINDS 10 TO 15 KT.
SEAS 3 FT OR LESS.
WED NIGHT
S TO SW WINDS 10 TO 15 KT S OF 27N, AND SW 15 TO
20 KT N OF 27N. SEAS 3 FT OR LESS. SCATTERED SHOWERS AND ISOLATED
TSTMS.
THU
S TO SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. NUMEROUS
SHOWERS AND SCATTERED TSTMS.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
FRI
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT
SE TO S WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
SUN
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
GMZ041-220900-
SW LOUISIANA OFFSHORE WATERS INCLUDING FLOWER GARDEN BANK MARINE
SANCTUARY-
459 PM EDT TUE JUL 21 2026
..TROPICAL STORM WARNING
TONIGHT
SW TO W WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
WED
SW TO W WINDS 15 TO 20 KT. SEAS 5 TO 7 FT. SCATTERED
SHOWERS AND ISOLATED TSTMS.
WED NIGHT
TROPICAL STORM CONDITIONS POSSIBLE. N OF 28N SW WINDS
20 TO 30 KT. SEAS 6 TO 8 FT. S OF 28N SW WINDS 15 TO 20 KT. SEAS
5 TO 7 FT. NUMEROUS SHOWERS AND SCATTERED TSTMS.
THU
TROPICAL STORM CONDITIONS POSSIBLE. SW WINDS 30 TO 35 KT,
DIMINISHING TO 20 TO 25 KT IN THE AFTERNOON. SEAS 5 TO 7 FT.
SCATTERED SHOWERS AND ISOLATED TSTMS.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
SE TO S WINDS 10 KT. SEAS 2 TO 4 FT.
FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
SAT
SE TO S WINDS 10 KT. SEAS 3 FT OR LESS.
SAT NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
SUN
S WINDS 10 KT. SEAS 3 FT OR LESS.
GMZ056-220900-
N CENTRAL GULF OF AMERICA OFFSHORE WATERS-
459 PM EDT TUE JUL 21 2026
..TROPICAL STORM WARNING
TONIGHT
TROPICAL STORM CONDITIONS. SW TO W WINDS 20 TO 25 KT
W OF 89W, AND SW TO W 40 TO 45 KT E OF 89W. SEAS 10 TO 15 FT.
SCATTERED TSTMS.
WED
TROPICAL STORM CONDITIONS EXPECTED. W OF 89W, SW TO W
WINDS 25 TO 30 KT. E OF 89W, SW WINDS 35 TO 40 KT, DIMINISHING TO
25 TO 30 KT IN THE AFTERNOON. SEAS 10 TO 15 FT IN W TO NW SWELL.
SCATTERED SHOWERS AND ISOLATED TSTMS.
WED NIGHT
S TO SW WINDS 20 TO 25 KT. SEAS 8 TO 12 FT IN W TO
NW SWELL.
THU
S WINDS 10 TO 15 KT. SEAS 6 TO 8 FT IN W TO NW SWELL.
THU NIGHT
SE TO S WINDS 10 KT. SEAS 4 TO 6 FT IN W TO NW
SWELL.
FRI
E TO SE WINDS 10 KT. SEAS 2 TO 4 FT.
FRI NIGHT
E TO SE WINDS 10 KT. SEAS 3 FT OR LESS.
SAT
E TO SE WINDS 10 KT IN THE MORNING, BECOMING VARIABLE LESS
THAN 5 KT. SEAS 3 FT OR LESS.
SAT NIGHT
SE WINDS 10 KT. SEAS 3 FT OR LESS.
SUN
SW TO W WINDS 10 KT. SEAS 3 FT OR LESS.
GMZ057-220900-
NE GULF OF AMERICA N OF 26N E OF 87W-
459 PM EDT TUE JUL 21 2026
..TROPICAL STORM WARNING
TONIGHT
TROPICAL STORM CONDITIONS. W OF 85W, SW WINDS 40 TO
45 KT, BECOMING S TO SW 30 TO 35 KT LATE. E OF 85W, S
TO SW WINDS 20 TO 25 KT. SEAS 10 TO 16 FT. SCATTERED SHOWERS AND
ISOLATED TSTMS.
WED
S TO SW WINDS 25 TO 30 KT W OF 85W, AND S 15 TO 20 KT E OF
85W. SEAS 9 TO 13 FT IN W TO NW SWELL.
WED NIGHT
S WINDS 15 TO 20 KT. SEAS 7 TO 11 FT IN W TO NW
SWELL.
THU
SE WINDS 10 KT. SEAS 5 TO 7 FT IN W TO NW SWELL.
THU NIGHT
SE TO S WINDS 10 KT, SHIFTING TO N TO NE LATE. SEAS
3 TO 5 FT.
FRI
NE TO E WINDS 10 KT. SEAS 3 FT OR LESS.
FRI NIGHT
NE TO E WINDS 10 KT. SEAS 3 FT OR LESS.
SAT
VARIABLE WINDS LESS THAN 5 KT. SEAS 3 FT OR LESS.
SAT NIGHT
S TO SW WINDS 10 KT. SEAS 3 FT OR LESS.
SUN
W WINDS 10 KT. SEAS 3 FT OR LESS.
GMZ058-220900-
W CENTRAL GULF OF AMERICA FROM 22N TO 26N W OF 94W-
459 PM EDT TUE JUL 21 2026
TONIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
WED
S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
WED NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
THU
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
THU NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
FRI
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
FRI NIGHT
E TO SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SUN
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
GMZ045-220900-
W CENTRAL GULF OF AMERICA FROM 22N TO 26N BETWEEN 91W AND 94W-
459 PM EDT TUE JUL 21 2026
TONIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
WED
S WINDS 10 KT. SEAS 2 TO 4 FT.
WED NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
THU
SE TO S WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
THU NIGHT
E TO SE WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
FRI
E TO SE WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
FRI NIGHT
E TO SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E TO SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SUN
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
GMZ046-220900-
CENTRAL GULF OF AMERICA FROM 22N TO 26N BETWEEN 87W AND 91W-
459 PM EDT TUE JUL 21 2026
TONIGHT
S OF 24N, N WINDS 10 KT, SHIFTING TO SE LATE. N OF
24N, SW WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
WED
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
THU NIGHT
E WINDS 15 TO 20 KT S OF 24N, AND E 10 TO 15 KT N OF
24N. SEAS 2 TO 4 FT.
FRI
E WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
FRI NIGHT
E WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
SAT
E TO SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT NIGHT
E TO SE WINDS 15 TO 20 KT S OF 24N, AND E TO SE
10 TO 15 KT N OF 24N. SEAS 2 TO 4 FT.
SUN
S OF 24N, E TO SE WINDS 10 TO 15 KT. N OF 24N, S WINDS
10 TO 15 KT IN THE MORNING, BECOMING VARIABLE LESS THAN 5 KT.
SEAS 2 TO 4 FT.
GMZ047-220900-
SE GULF OF AMERICA FROM 22N TO 26N E OF 87W INCLUDING STRAITS OF
FLORIDA-
459 PM EDT TUE JUL 21 2026
TONIGHT
SW WINDS 15 TO 20 KT, SHIFTING TO SE 10 TO 15 KT LATE.
SEAS 4 TO 6 FT.
WED
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU
E WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
THU NIGHT
NE TO E WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
FRI
E WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT
SE WINDS 10 KT. SEAS 3 FT OR LESS.
SAT NIGHT
E WINDS 10 KT, SHIFTING TO SE TO S LATE.
SEAS 3 FT OR LESS.
SUN
VARIABLE WINDS LESS THAN 5 KT, BECOMING NW TO N 10 KT IN
THE AFTERNOON. SEAS 3 FT OR LESS.
GMZ048-220900-
SW GULF OF AMERICA S OF 22N W OF 94W-
459 PM EDT TUE JUL 21 2026
TONIGHT
NE TO E WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
WED
E TO SE WINDS 10 KT. SEAS 3 FT OR LESS.
WED NIGHT
E WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
THU
E TO SE WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
THU NIGHT
NE TO E WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
FRI
E WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
SAT
E WINDS 10 KT. SEAS 2 TO 4 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 3 FT OR LESS.
SUN
E TO SE WINDS 10 KT. SEAS 2 TO 4 FT.
GMZ049-220900-
CENTRAL BAY OF CAMPECHE-
459 PM EDT TUE JUL 21 2026
TONIGHT
NE WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
WED
E TO SE WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
WED NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
THU
E TO SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
THU NIGHT
NE WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
FRI
E TO SE WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
FRI NIGHT
NE TO E WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
SAT
E TO SE WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
SAT NIGHT
NE TO E WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
SUN
E TO SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
GMZ050-220900-
E BAY OF CAMPECHE INCLUDING CAMPECHE BANK-
459 PM EDT TUE JUL 21 2026
TONIGHT
N WINDS 15 TO 20 KT, SHIFTING TO E LATE.
SEAS 2 TO 4 FT.
WED
SE WINDS 15 TO 20 KT, SHIFTING TO E TO SE 10 KT IN THE
AFTERNOON. SEAS 2 TO 4 FT.
WED NIGHT
N TO NE WINDS 15 TO 20 KT, SHIFTING TO E LATE. SEAS
2 TO 4 FT.
THU
SE WINDS 10 TO 15 KT, SHIFTING TO NE TO E IN THE
AFTERNOON. SEAS 2 TO 4 FT.
THU NIGHT
NE TO E WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
FRI
E TO SE WINDS 10 TO 15 KT, SHIFTING TO NE IN THE
AFTERNOON. SEAS 3 TO 5 FT.
FRI NIGHT
E WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
SAT
W OF 90W, SE WINDS 15 TO 20 KT, SHIFTING TO N TO NE 10 TO
15 KT IN THE AFTERNOON. E OF 90W, SE WINDS 10 KT, SHIFTING TO NE
15 TO 20 KT IN THE AFTERNOON. SEAS 3 TO 5 FT.
SAT NIGHT
NE WINDS 15 TO 20 KT, SHIFTING TO SE 10 TO 15 KT
LATE. SEAS 2 TO 4 FT.
SUN
SE WINDS 10 TO 15 KT, SHIFTING TO NE IN THE AFTERNOON.
SEAS 2 TO 4 FT.
FORECASTER CHRISTENSEN
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