Coastal Waters Forecast
Issued by NWS Houston/Galveston, TX

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FZUS54 KHGX 180806
CWFHGX

Coastal Waters Forecast
National Weather Service Houston/Galveston TX
306 AM CDT Sun Aug 18 2019

Upper Texas coastal waters from High Island to the Matagorda Ship
Channel out 60 nautical miles including Galveston and Matagorda Bays

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.

GMZ300-182115-
Synopsis for High Island to the Matagorda Ship Channel out 60
nautical miles including Galveston and Matagorda Bays
306 AM CDT Sun Aug 18 2019

.SYNOPSIS FOR HIGH ISLAND TO MATAGORDA SHIP CHANNEL OUT 60 NM...
Light to moderate onshore flow with slightly higher wind speeds
this morning will gradually diminish after sunrise. Winds may
become gusty and erratic near any thunderstorms that develop today
and Monday. High pressure building into the region through next
week will bring more relatively quiet weather.

$$

GMZ335-182115-
Galveston Bay-
306 AM CDT Sun Aug 18 2019

.TODAY...South winds 10 to 15 knots. Bay waters slightly choppy.
A slight chance of showers and thunderstorms in the morning. A
chance of showers and thunderstorms early in the afternoon, then
a slight chance of showers and thunderstorms late.
.TONIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.MONDAY...South winds 5 to 10 knots. Bay waters smooth. A chance
of showers and thunderstorms.
.MONDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth. A
slight chance of showers after midnight.
.TUESDAY...South winds around 5 knots becoming 5 to 10 knots in
the afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...South winds 5 to 10 knots becoming southwest
after midnight. Bay waters smooth. A slight chance of showers and
thunderstorms after midnight.
.WEDNESDAY...Southeast winds 5 to 10 knots. Bay waters smooth. A
slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
A slight chance of showers and thunderstorms after midnight.
.THURSDAY...South winds around 5 knots becoming southeast in the
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms.
.THURSDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth. A
slight chance of showers and thunderstorms.

$$

GMZ330-182115-
Matagorda Bay-
306 AM CDT Sun Aug 18 2019

.TODAY...South winds 10 to 15 knots. Bay waters slightly choppy.
.TONIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy.
.MONDAY...South winds around 10 knots. Bay waters smooth to
slightly choppy. A chance of showers and thunderstorms in the
morning, then a slight chance of showers and thunderstorms in the
afternoon.
.MONDAY NIGHT...Southeast winds 10 to 15 knots becoming south
5 to 10 knots after midnight. Bay waters slightly choppy becoming
smooth after midnight. A slight chance of showers after midnight.
.TUESDAY...South winds 5 to 10 knots. Bay waters smooth. A chance
of showers and thunderstorms in the morning, then a slight chance
of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.WEDNESDAY...Southeast winds 5 to 10 knots increasing to 10 to
15 knots in the afternoon. Bay waters smooth becoming slightly
choppy in the afternoon. A slight chance of showers and
thunderstorms in the morning, then a chance of showers and
thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots becoming south
5 to 10 knots after midnight. Bay waters slightly choppy becoming
smooth after midnight.
.THURSDAY...Southeast winds 5 to 10 knots. Bay waters smooth. A
slight chance of showers and thunderstorms.
.THURSDAY NIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy. A slight chance of showers and thunderstorms.

$$

GMZ350-355-182115-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
306 AM CDT Sun Aug 18 2019

...Small Craft Should Exercise Caution...

.TODAY...South winds 15 to 20 knots decreasing to 10 to 15 knots
in the afternoon. Seas 3 to 4 feet. A slight chance of showers
and thunderstorms early in the morning.
.TONIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet.
.MONDAY...South winds 10 to 15 knots. Seas 3 to 4 feet. A chance
of showers and thunderstorms.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet. A
chance of showers after midnight.
.TUESDAY...South winds 5 to 10 knots. Seas 2 to 4 feet. Showers
and thunderstorms likely in the morning, then a slight chance of
showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms after midnight.
.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
chance of showers and thunderstorms in the morning, then a slight
chance of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots becoming south
5 to 10 knots after midnight. Seas 2 to 3 feet. A slight chance
of showers and thunderstorms after midnight.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.

$$

GMZ370-375-182115-
Waters from Freeport to Matagorda Ship Channel TX from 20 to
60 NM-Waters from High Island to Freeport TX from 20 to 60 NM-
306 AM CDT Sun Aug 18 2019

...Small Craft Should Exercise Caution...

.TODAY...South winds 15 to 20 knots decreasing to 10 to 15 knots
in the afternoon. Seas 3 to 5 feet.
.TONIGHT...South winds 10 to 15 knots. Seas 4 feet. A slight
chance of showers after midnight.
.MONDAY...South winds 10 to 15 knots. Seas 4 to 5 feet with
occasional seas up to 6 feet. A chance of showers and
thunderstorms.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 4 feet. A chance
of showers after midnight.
.TUESDAY...South winds 5 to 10 knots. Seas 3 to 4 feet. A chance
of showers and thunderstorms in the morning, then a slight chance
of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...South winds 5 to 10 knots. Seas 3 feet. A slight
chance of showers and thunderstorms after midnight.
.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 3 feet. A chance
of showers and thunderstorms in the morning, then a slight chance
of showers and thunderstorms in the afternoon.
.WEDNESDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 feet. A
slight chance of showers and thunderstorms after midnight.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
chance of showers and thunderstorms.
.THURSDAY NIGHT...South winds 10 to 15 knots. Seas 3 to 4 feet. A
chance of showers and thunderstorms.

$$



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