201
FZUS54 KBRO 250905
CWFBRO

Coastal Waters Forecast for the Lower Texas Coast
National Weather Service Brownsville TX
405 AM CDT Wed Sep 25 2024

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.

GMZ100-252130-
405 AM CDT Wed Sep 25 2024

.SYNOPSIS...High pressure across the eastern Gulf will support
light to moderate winds and slight seas today. Tropical Storm
Helene is expected to become Hurricane Helene while moving north-
northeast through the eastern Gulf of Mexico later today through
Thursday evening. Resulting swell will begin to arrive to the
lower Texas coast Thursday. Meanwhile, a weak cold front is
expected to pass through the western Gulf Coastal Waters tonight
into Thursday morning, accompanied by a brief period of moderate
to fresh northerly winds through Thursday evening. The combined
effects of the front and swell will result in enhanced wave
heights beginning Thursday and continuing through Friday. Small
Craft Should Exercise Caution headlines for seas may be needed
Thursday through Friday night. Favorable conditions look to return
Saturday.

$$

GMZ130-132-135-252130-
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-
405 AM CDT Wed Sep 25 2024

.TODAY...Northeast winds around 5 knots, becoming 5 to 10 knots
this afternoon, then becoming northeast 5 to 10 knots late this
afternoon. Smooth on the bay, increasing to light chop this
afternoon. A chance of showers with a slight chance of
thunderstorms this morning.
.TONIGHT...East winds 5 to 10 knots, becoming north after
midnight. Light chop on the bay, diminishing to smooth late in
the evening, then increasing to light chop after midnight. A
chance of showers and thunderstorms late in the evening. A slight
chance of showers and thunderstorms after midnight.
.THURSDAY...North winds 10 to 15 knots. A moderate chop on the
bay. A slight chance of showers and thunderstorms.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots, becoming east
5 to 10 knots in the late evening and early morning, then
becoming northwest early in the morning. A moderate chop on the
bay, diminishing to light chop in the late evening and early
morning, then diminishing to smooth early in the morning. A
slight chance of showers early in the evening.
.FRIDAY...Northwest winds 5 to 10 knots, becoming northeast late
in the afternoon. Light chop on the bay, diminishing to smooth in
the afternoon.
.FRIDAY NIGHT...East winds around 5 knots, becoming southwest
early in the morning. Smooth on the bay.
.SATURDAY...West winds around 5 knots, becoming northeast early
in the afternoon, then becoming east late in the afternoon.
Smooth on the bay.
.SATURDAY NIGHT...Southeast winds around 5 knots, becoming south
after midnight. Smooth on the bay, increasing to light chop after
midnight.
.SUNDAY...Southwest winds around 5 knots, becoming northeast late
in the afternoon. Smooth on the bay, increasing to light chop
late in the afternoon.
.SUNDAY NIGHT...East winds 5 to 10 knots, becoming south early in
the morning. Light chop on the bay, diminishing to smooth after
midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ150-155-252130-
Gulf waters from Port Mansfield to the Rio Grande out 20 nm-
Gulf waters from Baffin Bay to Port Mansfield out 20 nm-
405 AM CDT Wed Sep 25 2024

.TODAY...East winds around 5 knots, becoming northeast this
afternoon. Seas 1 to 2 feet. Wave Detail: East 2 feet at
5 seconds. A chance of showers and thunderstorms this morning.
.TONIGHT...East winds 5 to 10 knots, becoming north after
midnight, then increasing to 10 to 15 knots early in the morning.
Seas 1 to 2 feet. Wave Detail: East 2 feet at 5 seconds. A chance
of showers and thunderstorms in the late evening and early
morning. A chance of showers with a slight chance of
thunderstorms early in the morning.
.THURSDAY...North winds 10 to 15 knots. Seas 2 to 4 feet,
building to 4 to 5 feet in the afternoon. Wave Detail: Northeast
4 feet at 5 seconds, becoming northeast 5 feet at 7 seconds. A
chance of thunderstorms in the morning. A chance of showers. A
slight chance of thunderstorms in the afternoon.
.THURSDAY NIGHT...Northeast winds 10 to 15 knots, diminishing to
5 to 10 knots after midnight, then becoming north early in the
morning. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail:
Northeast 6 feet at 9 seconds. A slight chance of showers early
in the evening.
.FRIDAY...Northwest winds 5 to 10 knots, becoming northeast late
in the afternoon. Seas 4 to 5 feet. Wave Detail: East 5 feet at
11 seconds.
.FRIDAY NIGHT...East winds around 5 knots, becoming southwest
early in the morning. Seas 3 to 4 feet. Wave Detail: East 4 feet
at 10 seconds.
.SATURDAY...West winds 5 to 10 knots, becoming northwest early in
the afternoon, then becoming northeast late in the afternoon.
Seas 2 to 3 feet.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots, becoming south
after midnight. Seas 2 to 3 feet.
.SUNDAY...Southwest winds 5 to 10 knots, becoming northeast late
in the afternoon. Seas 1 to 2 feet.
.SUNDAY NIGHT...East winds 5 to 10 knots, becoming southeast
after midnight. Seas 2 to 3 feet.

Winds and seas higher in and near thunderstorms.

$$

GMZ170-175-252130-
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-
405 AM CDT Wed Sep 25 2024

.TODAY...East winds around 5 knots, becoming northeast this
afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at
5 seconds. A chance of showers with a slight chance of
thunderstorms early this morning, then a slight chance of showers
and thunderstorms late this morning.
.TONIGHT...Northeast winds 5 to 10 knots, becoming north after
midnight, then increasing to 10 to 15 knots early in the morning.
Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 5 seconds. A
slight chance of showers and thunderstorms late in the evening. A
chance of showers with a slight chance of thunderstorms after
midnight.
.THURSDAY...North winds 15 to 20 knots. Seas 3 to 5 feet,
building to 5 to 7 feet, occasionally to 9 feet in the afternoon.
Wave Detail: Northeast 5 feet at 6 seconds, becoming north 6 feet
at 8 seconds. A chance of thunderstorms in the morning. A chance
of showers. A slight chance of thunderstorms in the afternoon.
.THURSDAY NIGHT...North winds 10 to 15 knots. Seas 6 to 8 feet,
occasionally to 10 feet. Wave Detail: Northeast 7 feet at
9 seconds. A slight chance of showers early in the evening.
.FRIDAY...North winds 5 to 10 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: East 6 feet at 11 seconds
and northwest 2 feet at 4 seconds.
.FRIDAY NIGHT...Northeast winds around 5 knots, becoming south
after midnight. Seas 3 to 5 feet. Wave Detail: East 4 feet at
10 seconds and northwest 2 feet at 5 seconds.
.SATURDAY...Southwest winds 5 to 10 knots, becoming north late in
the afternoon. Seas 2 to 4 feet.
.SATURDAY NIGHT...East winds around 5 knots, becoming south after
midnight. Seas 2 to 3 feet.
.SUNDAY...Southwest winds 5 to 10 knots, becoming northwest late
in the morning, then becoming north early in the afternoon,
becoming northeast late in the afternoon. Seas 2 to 3 feet.
.SUNDAY NIGHT...Northeast winds around 5 knots, becoming
southeast in the late evening and overnight. Seas 2 to 3 feet. A
slight chance of showers early in the morning.

Winds and seas higher in and near thunderstorms.

$$