Coastal Waters Forecast
Issued by NWS Houston/Galveston, TX

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FZUS54 KHGX 202033
CWFHGX

Coastal Waters Forecast
National Weather Service Houston/Galveston TX
333 PM CDT Sun May 20 2018

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.

GMZ300-210915-
Synopsis for High Island to the Matagorda Ship Channel out 60
nautical miles including Galveston and Matagorda Bays
333 PM CDT Sun May 20 2018

.SYNOPSIS FOR HIGH ISLAND TO MATAGORDA SHIP CHANNEL OUT 60 NM...
Light to moderate onshore winds this afternoon and evening will
gradually diminish after midnight as high pressure settles into
East Texas. A large area of showers and thunderstorms over
Southeast Texas should shift toward the coast and could push out
into the nearshore waters tonight. Gusty winds would accompany the
storms. Light winds are expected most of the upcoming week.
$$

GMZ335-210915-
Galveston Bay-
333 PM CDT Sun May 20 2018

.TONIGHT...Southeast winds 5 to 10 knots increasing to 10 to
15 knots after midnight. Bay waters smooth becoming slightly
choppy after midnight. A slight chance of showers. A slight
chance of thunderstorms after midnight.
.MONDAY...East winds around 5 knots becoming southeast in the
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms.
.MONDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.TUESDAY...Southeast winds around 5 knots becoming 5 to 10 knots
in the afternoon. Bay waters smooth. A slight chance of showers
and thunderstorms.
.TUESDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.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 becoming southwest
after midnight. Bay waters smooth.
.THURSDAY...Northwest winds around 5 knots becoming south in the
afternoon. Bay waters smooth. A chance of showers and a slight
chance of thunderstorms.
.THURSDAY NIGHT...South winds 5 to 10 knots becoming west after
midnight. Bay waters smooth. A slight chance of showers and
thunderstorms.
.FRIDAY...Northwest winds around 5 knots becoming south in the
afternoon. Bay waters smooth. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots becoming west after
midnight. Bay waters smooth. A slight chance of showers and
thunderstorms.

$$

GMZ355-210915-
Coastal waters from High Island to Freeport TX out 20 NM-
333 PM CDT Sun May 20 2018

.TONIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A
slight chance of showers. A slight chance of thunderstorms after
midnight.
.MONDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas 2 feet.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 2 feet. A slight
chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 to 2 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 1 to 2 feet. A
slight chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots becoming
southwest after midnight. Seas 1 to 2 feet.
.THURSDAY...Northwest winds around 5 knots becoming south in the
afternoon. Seas 1 foot. A chance of showers and a slight chance
of thunderstorms.
.THURSDAY NIGHT...South winds 5 to 10 knots becoming west after
midnight. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms.
.FRIDAY...Northwest winds around 5 knots becoming south in the
afternoon. Seas 1 to 2 feet. A chance of showers and
thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots becoming southwest
after midnight. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms.

$$

GMZ375-210915-
Waters from High Island to Freeport TX from 20 to 60 NM-
333 PM CDT Sun May 20 2018

.TONIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A
slight chance of showers and thunderstorms after midnight.
.MONDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. A slight
chance of showers and thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 2 feet. A slight
chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 feet.
.WEDNESDAY...East winds around 5 knots. Seas 2 feet. A slight
chance of showers and thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots becoming south
after midnight. Seas 2 feet. A slight chance of showers and
thunderstorms.
.THURSDAY...Northwest winds around 5 knots becoming northeast in
the afternoon. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms.
.THURSDAY NIGHT...South winds around 5 knots becoming southwest
after midnight. Seas 1 to 2 feet. A slight chance of showers and
thunderstorms.
.FRIDAY...Northwest winds around 5 knots becoming west in the
afternoon. Seas 2 feet. A chance of showers and thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots becoming southwest
after midnight. Seas 2 feet. A chance of showers and
thunderstorms.

$$

GMZ330-210915-
Matagorda Bay-
333 PM CDT Sun May 20 2018

.TONIGHT...Southeast winds 10 to 15 knots early becoming east
near 15 knots and gusty. Bay waters slightly choppy becoming
choppy after midnight. A slight chance of showers.
.MONDAY...Southeast winds 5 to 10 knots. Bay waters smooth. A
slight chance of showers and thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters smooth.
.TUESDAY...Southeast winds 5 to 10 knots. Bay waters smooth. A
slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters
smooth.
.WEDNESDAY...Southeast winds 5 to 10 knots. Bay waters smooth.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters
smooth.
.THURSDAY...Southeast winds 5 to 10 knots. Bay waters smooth. A
slight chance of showers.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots becoming
southwest after midnight. Bay waters smooth.
.FRIDAY...West winds around 5 knots becoming south in the
afternoon. Bay waters smooth. A slight chance of showers and
thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots becoming southwest
after midnight. Bay waters smooth.

$$

GMZ350-210915-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-
333 PM CDT Sun May 20 2018

.TONIGHT...Southeast winds 10 to 15 knots becoming gusty tonight
with gusts near 25 knots possible. Seas 3 to 4 feet. A slight
chance of showers.
.MONDAY...Southeast winds 5 to 10 knots. Seas 3 feet. A slight
chance of showers and thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A
slight chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.WEDNESDAY...Southeast winds 5 to 10 knots. Seas 2 feet.
.WEDNESDAY NIGHT...Southeast winds around 10 knots becoming south
after midnight. Seas 1 to 2 feet.
.THURSDAY...Southeast winds 5 to 10 knots. Seas 1 to 2 feet. A
slight chance of showers.
.THURSDAY NIGHT...South winds 5 to 10 knots becoming southwest
after midnight. Seas 1 to 2 feet.
.FRIDAY...West winds around 5 knots becoming south in the
afternoon. Seas 2 feet. A chance of showers and thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots becoming southwest
after midnight. Seas 2 feet. A slight chance of showers and
thunderstorms.

$$

GMZ370-210915-
Waters from Freeport to Matagorda Ship Channel TX from 20 to
60 NM-
333 PM CDT Sun May 20 2018

.TONIGHT...Southeast winds 10 to 15 knots increasing to around 15
knots with gusts to 20 knots toward midnight. Seas 3 to 4 feet. A
slight chance of showers after midnight.
.MONDAY...Southeast winds 5 to 10 knots. Seas 3 to 4 feet. A
slight chance of showers and thunderstorms.
.MONDAY NIGHT...Southeast winds around 10 knots. Seas 3 feet.
.TUESDAY...East winds 5 to 10 knots. Seas 2 to 3 feet. A slight
chance of showers and thunderstorms.
.TUESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
.WEDNESDAY...East winds 5 to 10 knots. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 feet.
.THURSDAY...East winds around 5 knots. Seas 2 feet. A slight
chance of showers.
.THURSDAY NIGHT...Southeast winds 5 to 10 knots becoming south
after midnight. Seas 2 feet.
.FRIDAY...West winds around 5 knots. Seas 2 feet. A chance of
showers and thunderstorms.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 2 feet. A slight
chance of showers and thunderstorms.

$$



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