260
FZNT24 KNHC 210906
OFFNT4
OFFSHORE WATERS FORECAST FOR THE GULF OF AMERICA
NWS NATIONAL HURRICANE CENTER MIAMI, FL
506 AM 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.
GMZ001-212115-
SYNOPSIS FOR THE GULF OF AMERICA
506 AM EDT TUE JUL 21 2026
SYNOPSIS
TROPICAL STORM BERTHA IS NEAR 28.7N 86.4W, OR ABOUT
110 NM SOUTH OF PANAMA CITY, FLORIDA AT 5 AM EDT, AND IS MOVING
NORTHWEST AT 4 KT. MAXIMUM SUSTAINED WINDS ARE 45 KT WITH GUSTS TO
55 KT, AND THE MINIMUM CENTRAL PRESSURE IS 998 MB. BERTHA WILL
MOVE TO NEAR 29.0N 86.8W THIS AFTERNOON WITH MAXIMUM SUSTAINED
WINDS 50 KT GUSTS 60 KT, THEN BEGIN TO WEAKEN AS IT MOVES TO NEAR
29.4N 87.6W LATE TONIGHT, TO NEAR 29.5N 88.7W WED AFTERNOON WITH
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT AND INLAND TO NEAR 29.3N
90.5W LATE WED NIGHT. BERTHA IS FORECAST TO WEAKEN TO A TROPICAL
DEPRESSION NEAR 29.3N 92.2W THU AFTERNOON, MOVE TO NEAR 29.6N
94.2W LATE THU NIGHT AND BECOME A REMNANT LOW AS IT MOVES TO NEAR
30.4N 96.5W LATE FRI NIGHT. 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. OTHERWISE, WEAK HIGH
PRESSURE OVER THE WESTERN GULF WILL NOT BE EVIDENT BY MIDWEEK.
AFTER MIDWEEK, ATLANTIC HIGH PRESSURE WILL EXTEND WESTWARD TO THE
CENTRAL GULF.
GMZ040-212115-
NW GULF OF AMERICA INCLUDING STETSON BANK-
506 AM EDT TUE JUL 21 2026
TODAY
SW TO W WINDS 10 KT. SEAS 3 TO 4 FT.
TONIGHT
S TO SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED
SW TO W WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED NIGHT
S TO SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. SCATTERED
SHOWERS AND ISOLATED THUNDERSTORMS.
THU
S TO SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT
SE TO S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
GMZ041-212115-
SW LOUISIANA OFFSHORE WATERS INCLUDING FLOWER GARDEN BANK MARINE
SANCTUARY-
506 AM EDT TUE JUL 21 2026
TODAY
W TO NW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. ISOLATED
TSTMS.
TONIGHT
SW TO W WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
WED
SW TO W WINDS 15 TO 20 KT. SEAS 5 TO 7 FT IN NE SWELL.
SCATTERED SHOWERS AND ISOLATED TSTMS.
WED NIGHT
SW WINDS 15 TO 20 KT. SEAS 5 TO 7 FT IN W TO NW
SWELL. NUMEROUS SHOWERS AND SCATTERED TSTMS.
THU
SW WINDS 10 TO 15 KT. SEAS 4 TO 6 FT.
THU NIGHT
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
SE TO S WINDS 10 KT. SEAS 3 TO 4 FT.
FRI NIGHT
SE WINDS 10 KT. SEAS 3 TO 4 FT.
SAT
SE TO S WINDS 10 KT. SEAS 3 TO 4 FT.
SAT NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
GMZ056-212115-
N CENTRAL GULF OF AMERICA OFFSHORE WATERS-
506 AM EDT TUE JUL 21 2026
..TROPICAL STORM WARNING
TODAY
TROPICAL STORM CONDITIONS. W OF 90W, W TO NW WINDS
15 TO 20 KT. SEAS 5 TO 7 FT. ELSEWHERE, W WINDS 40 TO 45 KT. SEAS
9 TO 14 FT. NUMEROUS SQUALLS AND THUNDERSTORMS.
TONIGHT
TROPICAL STORM CONDITIONS EXPECTED. W OF 90W, SW TO
W WINDS 20 TO 25 KT. SEAS 6 TO 9 FT. ELSEWHERE, SW TO W WINDS 40
TO 45 KT. SEAS 10 TO 16 FT. SCATTERED TO NUMEROUS SQUALLS AND
THUNDERSTORMS.
WED
TROPICAL STORM CONDITIONS EXPECTED. W OF 90W, SW TO W
WINDS 20 TO 25 KT. ELSEWHERE, SW WINDS 35 TO 40 KT, DIMINISHING
TO 25 TO 30 KT IN THE AFTERNOON. SEAS 5 TO 7 FT W OF 90W, AND
9 TO 14 FT ELSEWHERE EXCEPT 11 TO 16 FT NE PART. SCATTERED TO
NUMEROUS SQUALLS AND THUNDERSTORMS.
WED NIGHT
S TO SW WINDS 20 TO 25 KT. SEAS 6 TO 8 FT W OF 90W,
AND 7 TO 11 FT ELSEWHERE.
THU
S WINDS 10 TO 15 KT. SEAS 5 TO 7 FT.
THU NIGHT
SE TO S WINDS 10 KT. SEAS 3 TO 5 FT.
FRI
SE WINDS 10 KT. SEAS 3 TO 4 FT.
FRI NIGHT
E TO SE WINDS 10 KT. SEAS 3 TO 4 FT.
SAT
W OF 89W, SE WINDS 10 KT IN THE MORNING, BECOMING VARIABLE
LESS THAN 5 KT. E OF 89W, VARIABLE WINDS LESS THAN 5 KT. SEAS
2 TO 4 FT.
SAT NIGHT
VARIABLE WINDS LESS THAN 5 KT, BECOMING SE TO S
10 KT LATE. SEAS 2 TO 4 FT.
GMZ057-212115-
NE GULF OF AMERICA N OF 26N E OF 87W-
506 AM EDT TUE JUL 21 2026
..TROPICAL STORM WARNING
TODAY
TROPICAL STORM CONDITIONS. S OF 27N, SW WINDS 20 TO
25 KT. SEAS 5 TO 7 FT. ELSEWHERE, S TO SW WINDS 40 TO 50 KT. SEAS
9 TO 13 FT. NUMEROUS SQUALLS AND THUNDERSTORMS.
TONIGHT
TROPICAL STORM CONDITIONS EXPECTED. S OF 27N, S TO
SW WINDS 20 TO 25 KT. ELSEWHERE, S TO SW WINDS 40 TO 45 KT,
DIMINISHING TO 30 TO 35 KT LATE. SEAS 5 TO 7 FT S OF
27N, AND 9 TO 13 FT ELSEWHERE. NUMEROUS SQUALLS AND THUNDERSTORMS.
WED
S OF 27N, S WINDS 15 TO 20 KT. SEAS 4 TO 6 FT. ELSEWHERE,
S TO SW WINDS 25 TO 30 KT. SEAS 8 TO 12 FT. SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS.
WED NIGHT
S WINDS 15 TO 20 KT. SEAS 4 TO 6 FT S OF 27N, AND
7 TO 10 FT IN W TO NW SWELL ELSEWHERE.
THU
SE WINDS 10 KT. SEAS 4 TO 6 FT.
THU NIGHT
SE TO S WINDS 10 KT, SHIFTING TO N TO NE LATE. SEAS 3
TO 4 FT.
FRI
NE TO E WINDS 10 KT IN THE MORNING, BECOMING VARIABLE LESS
THAN 5 KT. SEAS 3 TO 4 FT.
FRI NIGHT
NE TO E WINDS 10 KT. SEAS 3 TO 4 FT.
SAT
VARIABLE WINDS LESS THAN 5 KT. SEAS 2 TO 4 FT.
SAT NIGHT
W OF 85W, S TO SW WINDS 10 KT LATE. VARIABLE WINDS
LESS THAN 5 KT IN THE EVENING. E OF 85W, VARIABLE LESS THAN 5 KT.
SEAS 2 TO 4 FT.
GMZ058-212115-
W CENTRAL GULF OF AMERICA FROM 22N TO 26N W OF 94W-
506 AM EDT TUE JUL 21 2026
TODAY
SE TO S WINDS 10 KT. SEAS 3 TO 4 FT.
TONIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
WED
SE TO S WINDS 10 KT. SEAS 3 TO 4 FT.
WED NIGHT
SE TO S WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
THU
SE TO S WINDS 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
FRI
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
GMZ045-212115-
W CENTRAL GULF OF AMERICA FROM 22N TO 26N BETWEEN 91W AND 94W-
506 AM EDT TUE JUL 21 2026
TODAY
S WINDS 10 KT. SEAS 3 TO 4 FT.
TONIGHT
VARIABLE WINDS LESS THAN 5 KT, BECOMING SE TO S 10 KT
LATE. SEAS 2 TO 4 FT.
WED
S WINDS 10 KT. SEAS 2 TO 4 FT.
WED NIGHT
VARIABLE WINDS LESS THAN 5 KT, BECOMING SE 10 KT
LATE. SEAS 3 TO 4 FT.
THU
SE WINDS 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 6 FT.
SAT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT NIGHT
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
GMZ046-212115-
CENTRAL GULF OF AMERICA FROM 22N TO 26N BETWEEN 87W AND 91W-
506 AM EDT TUE JUL 21 2026
TODAY
SW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
W WINDS 10 TO 15 KT, SHIFTING TO SE TO S LATE. SEAS
3 TO 5 FT.
WED
S WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED NIGHT
SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU
E TO SE WINDS 10 KT. SEAS 3 TO 4 FT.
THU NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 KT. SEAS 3 TO 4 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
SAT
E TO SE WINDS 10 KT. SEAS 3 TO 4 FT.
SAT NIGHT
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
GMZ047-212115-
SE GULF OF AMERICA FROM 22N TO 26N E OF 87W INCLUDING STRAITS OF
FLORIDA-
506 AM EDT TUE JUL 21 2026
TODAY
S WINDS 10 KT S OF 24N, AND S TO SW 15 TO 20 KT N OF
24N. SEAS 3 TO 5 FT. ISOLATED SHOWERS AND THUNDERSTORMS.
TONIGHT
S TO SW WINDS 10 TO 15 KT, SHIFTING TO SE LATE. SEAS
3 TO 5 FT. ISOLATED SHOWERS AND THUNDERSTORMS.
WED
SE WINDS 10 KT. SEAS 3 TO 5 FT. ISOLATED SHOWERS AND
THUNDERSTORMS.
WED NIGHT
S OF 24N, NE TO E WINDS 10 TO 15 KT. N OF 24N,
VARIABLE WINDS LESS THAN 5 KT, BECOMING E TO SE 10 KT LATE. SEAS
3 TO 5 FT. ISOLATED SHOWERS AND THUNDERSTORMS.
THU
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU NIGHT
NE TO E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 KT. SEAS 3 TO 4 FT.
FRI NIGHT
E WINDS 10 KT. SEAS 3 TO 4 FT.
SAT
S OF 24N, E TO SE WINDS 10 KT. N OF 24N, SE WINDS 10 KT IN
THE MORNING, BECOMING VARIABLE LESS THAN 5 KT. SEAS 2 TO 4 FT.
SAT NIGHT
E TO SE WINDS 10 KT S OF 24N, AND VARIABLE LESS THAN
5 KT N OF 24N. SEAS 2 TO 4 FT.
GMZ048-212115-
SW GULF OF AMERICA S OF 22N W OF 94W-
506 AM EDT TUE JUL 21 2026
TODAY
E TO SE WINDS 10 KT. SEAS 3 TO 4 FT.
TONIGHT
E WINDS 10 KT. SEAS 3 TO 4 FT.
WED
E TO SE WINDS 10 KT. SEAS 3 TO 4 FT.
WED NIGHT
E WINDS 10 KT. SEAS 3 TO 4 FT.
THU
E TO SE WINDS 10 KT IN THE MORNING, BECOMING VARIABLE LESS
THAN 5 KT. SEAS 2 TO 4 FT.
THU NIGHT
NE TO E WINDS 10 KT. SEAS 3 TO 4 FT.
FRI
E WINDS 10 KT. SEAS 3 TO 4 FT.
FRI NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT
E WINDS 10 KT. SEAS 3 TO 4 FT.
SAT NIGHT
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
GMZ049-212115-
CENTRAL BAY OF CAMPECHE-
506 AM EDT TUE JUL 21 2026
TODAY
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
TONIGHT
NE TO E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
WED NIGHT
NE TO E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
THU
S OF 20N, NE TO E WINDS 10 TO 15 KT. N OF 20N, E WINDS
10 TO 15 KT IN THE MORNING, BECOMING VARIABLE LESS THAN 5 KT.
SEAS 3 TO 4 FT.
THU NIGHT
NE WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
FRI
E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
FRI NIGHT
NE TO E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT
E TO SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT.
SAT NIGHT
NE TO E WINDS 15 TO 20 KT. SEAS 3 TO 5 FT.
GMZ050-212115-
E BAY OF CAMPECHE INCLUDING CAMPECHE BANK-
506 AM EDT TUE JUL 21 2026
TODAY
SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
TONIGHT
N TO NE WINDS 10 TO 15 KT, SHIFTING TO E LATE. SEAS
2 TO 4 FT.
WED
E TO SE WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
WED NIGHT
NE TO E WINDS 10 TO 15 KT. SEAS 2 TO 4 FT.
THU
E TO SE WINDS 10 TO 15 KT, SHIFTING TO NE IN THE
AFTERNOON. SEAS 2 TO 4 FT.
THU NIGHT
NE TO E WINDS 15 TO 20 KT. SEAS 4 TO 6 FT.
FRI
E TO SE WINDS 10 TO 15 KT, SHIFTING TO NE IN THE
AFTERNOON. SEAS 3 TO 6 FT.
FRI NIGHT
NE WINDS 15 TO 20 KT, BECOMING E TO SE 10 TO 15 KT
LATE. SEAS 4 TO 6 FT.
SAT
SE WINDS 10 TO 15 KT, SHIFTING TO N TO NE IN THE
AFTERNOON. SEAS 4 TO 6 FT.
SAT NIGHT
NE WINDS 15 TO 20 KT, SHIFTING TO E TO SE 10 TO
15 KT LATE. SEAS 3 TO 6 FT.
FORECASTER AGUIRRE
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page