GMZ300-221215-
 640 PM CDT Tue Apr 21 2026
 
 .Synopsis For High Island to the Matagorda Ship Channel Out 60 NM
 including Galveston and Matagorda Bays.
 
 Stronger winds around 20 knots with gusts to 30 knots have been
 observed across the lower portions of Galveston Bay and near the
 adjacent coastal waters. Waves heights in the lower bays are
 reportedly near 2-3 feet. While winds and seas should improve
 later tonight, becoming calmer around or after midnight, mariners
 should exercise caution as these hazardous conditions persist.
 Rain chances taper off tonight, though storm chances will
 continue throughout the week. An extended fetch of moderate
 southeasterly winds around midweek will likely lead to another
 round of increased seas, especially in the offshore Gulf waters.
 Water levels are expected to remain near 3.0 feet above Mean Lower
 Low Water during high tide cycles through at least the end of the
 work week.
 
 $$




 
 GMZ370-375-221215-
 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-
 640 PM CDT Tue Apr 21 2026
 
 SMALL CRAFT SHOULD EXERCISE CAUTION IN EFFECT UNTIL 7 PM CDT
 THIS EVENING
 

 TONIGHT
 Southeast winds 15 to 20 knots with gusts up to
 25 knots, diminishing to around 15 knots with gusts up to
 20 knots after midnight. Seas 4 to 5 feet. Wave Detail: East
 4 feet at 7 seconds. A chance of showers with a slight chance of
 thunderstorms early this evening. A slight chance of showers
 after midnight. A slight chance of thunderstorms late.

 WEDNESDAY
 Southeast winds around 10 knots. Seas 3 to 5 feet.
 Wave Detail: East 4 feet at 7 seconds. A chance of showers and
 thunderstorms.

 WEDNESDAY NIGHT
 Southeast winds 10 to 15 knots. Seas around
 4 feet. Wave Detail: East 4 feet at 7 seconds.

 THURSDAY
 Southeast winds 10 to 15 knots. Seas around 4 feet.
 Wave Detail: Southeast 3 feet at 7 seconds.

 THURSDAY NIGHT
 Southeast winds 10 to 15 knots with gusts up to
 20 knots. Seas 4 to 5 feet. Wave Detail: Southeast 4 feet at
 8 seconds.

 FRIDAY
 South winds around 10 knots. Seas 3 to 5 feet. Wave
 Detail: Southeast 4 feet at 8 seconds and south 2 feet at
 5 seconds.

 FRIDAY NIGHT
 South winds 10 to 15 knots. Seas 3 to 4 feet.

 SATURDAY
 South winds 10 to 15 knots. Seas around 3 feet.

 SATURDAY NIGHT
 Southeast winds 10 to 15 knots. Seas around
 3 feet.

 SUNDAY
 South winds 10 to 15 knots. Seas around 3 feet.

 SUNDAY NIGHT
 South winds 10 to 15 knots. Seas around 3 feet in
 the evening.
 
 Winds and seas higher in and near thunderstorms.
 
 $$