Coastal Waters Forecast
Issued by NWS Houston/Galveston, TX

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FZUS54 KHGX 212027
CWFHGX

Coastal Waters Forecast
National Weather Service Houston/Galveston TX
327 PM CDT Sat Oct 21 2017

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.

GMZ300-220915-
Synopsis for High Island to the Matagorda Ship Channel out 60
nautical miles including Galveston and Matagorda Bays
327 PM CDT Sat Oct 21 2017

.SYNOPSIS FOR HIGH ISLAND TO MATAGORDA SHIP CHANNEL OUT 60 NM...
A long onshore fetch will continue elevated seas and tides tonight.
Showers and thunderstorms will become more widespread late
tonight and Sunday ahead of a cold front. The front is expected
to push off of the coast by Sunday afternoon with moderate to
strong offshore winds developing by the evening. A reinforcing
front is expected to move off of the coast on Tuesday, increasing
winds and seas again after a brief lull.

$$

GMZ335-220915-
Galveston Bay-
327 PM CDT Sat Oct 21 2017

.TONIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy. A chance of showers and thunderstorms after midnight.
.SUNDAY...West winds 5 to 10 knots becoming north 15 to 20 knots
in the afternoon. Bay waters smooth becoming choppy in the
afternoon. Showers and thunderstorms likely through early
afternoon. A slight chance of showers late in the afternoon. Some
thunderstorms may produce gusty winds.
.SUNDAY NIGHT...North winds 15 to 20 knots. Bay waters choppy.
.MONDAY...North winds 15 to 20 knots decreasing to 10 to 15 knots
in the afternoon. Bay waters choppy becoming slightly choppy in
the afternoon.
.MONDAY NIGHT...Northwest winds 10 to 15 knots. Bay waters
slightly choppy.
.TUESDAY...North winds 15 to 20 knots. Bay waters choppy.
.TUESDAY NIGHT...North winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY...North winds around 10 knots becoming northwest in
the afternoon. Bay waters smooth to slightly choppy becoming
smooth in the afternoon.
.WEDNESDAY NIGHT...West winds around 5 knots becoming southwest
after midnight. Bay waters smooth.
.THURSDAY...South winds 10 to 15 knots. Bay waters slightly
choppy.
.THURSDAY NIGHT...South winds 15 to 20 knots. Bay waters choppy.

$$

GMZ330-220915-
Matagorda Bay-
327 PM CDT Sat Oct 21 2017

.TONIGHT...South winds 10 to 15 knots. Bay waters slightly
choppy. A chance of showers and thunderstorms after midnight.
.SUNDAY...Northwest winds 10 to 15 knots becoming north 15 to
20 knots in the afternoon. Bay waters slightly choppy becoming
choppy in the afternoon. Scattered showers and thunderstorms,
primarily in the morning. Some thunderstorms may produce gusty
winds.
.SUNDAY NIGHT...North winds 15 to 20 knots. Bay waters choppy.
.MONDAY...North winds 10 to 15 knots. Bay waters slightly choppy.
.MONDAY NIGHT...North winds 5 to 10 knots increasing to 10 to
15 knots after midnight. Bay waters smooth becoming slightly
choppy after midnight.
.TUESDAY...North winds 15 to 20 knots. Bay waters choppy.
.TUESDAY NIGHT...North winds 10 to 15 knots. Bay waters slightly
choppy.
.WEDNESDAY...North winds 5 to 10 knots becoming west in the
afternoon. Bay waters smooth.
.WEDNESDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth.
.THURSDAY...South winds 10 to 15 knots. Bay waters slightly
choppy.
.THURSDAY NIGHT...South winds 15 to 20 knots. Bay waters choppy.

$$

GMZ350-355-220915-
Coastal waters from Freeport to the Matagorda Ship Channel out
20 NM-Coastal waters from High Island to Freeport out 20 NM-
327 PM CDT Sat Oct 21 2017

.TONIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A
chance of showers and thunderstorms after midnight.
.SUNDAY...West winds 10 to 15 knots becoming north 15 to 20 knots
in the afternoon. Seas 2 to 4 feet. Showers and thunderstorms
likely until late afternoon, then a slight chance of showers late
in the afternoon. Some thunderstorms may produce gusty winds
until late afternoon.
.SUNDAY NIGHT...North winds 15 to 25 knots becoming 20 to
25 knots after midnight. Seas 4 to 6 feet with occasional seas up
to 7 feet.
.MONDAY...North winds 15 to 20 knots decreasing to 10 to 15 knots
in the afternoon. Seas 3 to 5 feet.
.MONDAY NIGHT...North winds 10 to 15 knots increasing to 15 to
20 knots after midnight. Seas 2 to 3 feet.
.TUESDAY...North winds 15 to 20 knots. Seas 3 to 5 feet.
.TUESDAY NIGHT...North winds 15 to 20 knots. Seas 3 to 5 feet.
.WEDNESDAY...North winds 10 to 15 knots becoming northwest 5 to
10 knots in the afternoon. Seas 2 to 3 feet.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots becoming south
after midnight. Seas 1 foot.
.THURSDAY...South winds 10 to 15 knots increasing to 15 to
20 knots in the afternoon. Seas 2 to 3 feet.
.THURSDAY NIGHT...South winds 15 to 20 knots. Seas 3 to 5 feet.

$$

GMZ370-375-220915-
Waters from Freeport to the Matagorda Ship Channel from 20 to
60 NM-Waters from High Island to Freeport from 20 to 60 NM-
327 PM CDT Sat Oct 21 2017

.TONIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet. A
slight chance of showers and thunderstorms after midnight.
.SUNDAY...West winds 5 to 10 knots becoming north 15 to 20 knots
in the afternoon. Seas 3 to 4 feet. Scattered showers and
thunderstorms in the morning, then thunderstorms and showers
likely in the afternoon. Some thunderstorms may produce gusty
winds.
.SUNDAY NIGHT...North winds 20 to 25 knots. Seas 5 to 7 feet with
occasional seas up to 8 feet.
.MONDAY...North winds 15 to 20 knots. Seas 4 to 6 feet with
occasional seas up to 7 feet.
.MONDAY NIGHT...North winds 10 to 15 knots increasing to 15 to
20 knots after midnight. Seas 3 to 4 feet.
.TUESDAY...North winds around 20 knots. Seas 4 to 6 feet with
occasional seas up to 7 feet.
.TUESDAY NIGHT...North winds 20 to 25 knots. Seas 4 to 6 feet
with occasional seas up to 7 feet.
.WEDNESDAY...North winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. Seas 3 to 5 feet.
.WEDNESDAY NIGHT...West winds 5 to 10 knots becoming south after
midnight. Seas 1 to 2 feet.
.THURSDAY...South winds 10 to 15 knots increasing to 15 to
20 knots in the afternoon. Seas 2 to 3 feet.
.THURSDAY NIGHT...South winds 15 to 20 knots. Seas 4 to 6 feet
with occasional seas up to 7 feet.

$$


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