133
FZUS54 KBRO 202352
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
552 PM CST Thu Nov 20 2025

Lower Texas coastal waters from Baffin Bay to the mouth of the
Rio Grande out 60 NM.

Seas are provided as a range of the average height of the highest
1/3 of the waves, along with the occasional height of the average
highest 10 percent of the waves.

GMZ100-211215-
552 PM CST Thu Nov 20 2025

.SYNOPSIS...A more enhanced pressure gradient across the western
Gulf will increase southeasterly winds and build seas along the
lower Texas Coast. The chance of showers and thunderstorms
returns as a frontal boundary approaches northern coastal waters
late tomorrow night and persist through the rest of the forecast
period. Another frontal boundary is expected next week that could
bring a combination of adverse and hazardous conditions to the
Lower Texas Coast.


$$

GMZ130-132-135-211215-
Laguna Madre from the Port of Brownsville to the Arroyo Colorado-
Laguna Madre from the Arroyo Colorado To 5 NM north of Port
Mansfield TX-
Laguna Madre from 5 nm north of Port Mansfield to Baffin Bay TX-
552 PM CST Thu Nov 20 2025

...SMALL CRAFT CAUTION...

.REST OF TONIGHT...Southeast winds 15 to 20 knots, becoming south
10 to 15 knots late this evening and overnight. A moderate chop
on the bay.
.FRIDAY...Southeast winds 10 to 15 knots. A moderate chop on the
bay.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots, diminishing to
5 to 10 knots early in the morning. A moderate chop on the bay,
diminishing to light chop early in the morning. A slight chance
of showers after midnight.
.SATURDAY...Southeast winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. A moderate chop on the bay. A chance
of showers with a slight chance of thunderstorms.
.SATURDAY NIGHT...Southeast winds around 10 knots. Light chop on
the bay. A chance of showers, mainly in the evening.
.SUNDAY...Southeast winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Choppy on the bay. A slight chance of
showers.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Choppy on the
bay.
.MONDAY...South winds 15 to 20 knots. Choppy on the bay. A slight
chance of showers. A slight chance of thunderstorms in the
afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight, then becoming southwest early in the
morning. A moderate chop on the bay, diminishing to light chop
after midnight. A slight chance of showers and thunderstorms.
.TUESDAY...West winds 5 to 10 knots, becoming east in the
afternoon. Light chop on the bay. A slight chance of showers.
.TUESDAY NIGHT...East winds 5 to 10 knots. Light chop on the bay.
A slight chance of thunderstorms. A slight chance of showers in
the evening, then a chance of showers after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-211215-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
552 PM CST Thu Nov 20 2025


...SMALL CRAFT CAUTION...

.REST OF TONIGHT...South winds 15 to 20 knots. Seas 3 to 5 feet.
Wave Detail: Southeast 4 feet at 6 seconds.
.FRIDAY...South winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 4 feet at 6 seconds. A slight chance of showers
and thunderstorms early in the afternoon.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 3 feet at 6 seconds. A slight chance of
thunderstorms in the evening. A slight chance of showers.
.SATURDAY...Southeast winds around 10 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers
with a slight chance of thunderstorms.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet. Wave Detail: Southeast 3 feet at 7 seconds. A chance of
showers, mainly in the evening.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A slight chance of
showers.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Seas 4 to 5 feet.
.MONDAY...South winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. A slight chance of showers. A slight
chance of thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots, becoming southwest
early in the morning. Seas 3 to 4 feet. A slight chance of
thunderstorms. A chance of showers, mainly in the evening.
.TUESDAY...Southwest winds around 10 knots, becoming northwest
late in the morning, then becoming east in the afternoon. Seas
3 to 4 feet. A slight chance of showers.
.TUESDAY NIGHT...East winds around 10 knots. Seas 2 to 4 feet. A
slight chance of thunderstorms. A slight chance of showers in the
evening, then a chance of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-211215-
Gulf waters from Port Mansfield to the Rio Grande extending from
20 to 60 nm-
Gulf waters from Baffin Bay to Port Mansfield extending from
20 to 60 nm-
552 PM CST Thu Nov 20 2025

.REST OF TONIGHT...South winds around 15 knots. Seas 4 to 5 feet.
Wave Detail: Southeast 4 feet at 5 seconds.
.FRIDAY...South winds 10 to 15 knots. Seas 3 to 5 feet. Wave
Detail: South 4 feet at 6 seconds.
.FRIDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet.
Wave Detail: South 3 feet at 6 seconds. A slight chance of
showers after midnight.
.SATURDAY...Southeast winds around 10 knots. Seas 3 to 4 feet.
Wave Detail: Southeast 3 feet at 6 seconds. A chance of showers
with a slight chance of thunderstorms.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet. Wave Detail: Southeast 3 feet at 6 seconds. A slight
chance of showers.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 4 to 5 feet. Wave
Detail: Southeast 3 feet at 6 seconds. A slight chance of
showers.
.SUNDAY NIGHT...Southeast winds 15 to 20 knots. Seas 4 to 5 feet,
building to 5 to 7 feet, occasionally to 9 feet after midnight.
.MONDAY...South winds 15 to 20 knots. Seas 5 to 7 feet,
occasionally to 9 feet. A slight chance of showers. A slight
chance of thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 4 to 5 feet. A
chance of showers with a slight chance of thunderstorms.
.TUESDAY...Southwest winds 5 to 10 knots, becoming west early in
the afternoon, then becoming east late in the afternoon. Seas
3 to 4 feet. A chance of showers with a slight chance of
thunderstorms in the morning, then a slight chance of showers in
the afternoon.
.TUESDAY NIGHT...East winds around 10 knots. Seas 2 to 4 feet. A
slight chance of showers and thunderstorms in the evening, then a
chance of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$