Synopsis for High Island to the Matagorda Ship Channel out 60 nautical miles including Galveston and Matagorda Bays 949 AM CST Mon Dec 2 2019 .SYNOPSIS FOR HIGH ISLAND TO MATAGORDA SHIP CHANNEL OUT 60 NM... The moderate offshore winds will be weakening this afternoon through Tuesday morning as high pressure builds into the region. Weak onshore flow returns on Tuesday. This will diminish seas through the remainder of the week. A week cold front will off the coast Wednesday but winds only briefly become offshore through Thursday morning. Another cold front pushes through on Friday. $$