 The National Hurricane Center ( NHC ) began monitoring disorganized convection across the northwestern Caribbean Sea in association with an upper @-@ level trough on June 12 . After interacting with a broad area of low pressure near the Yucatán Peninsula , an elongated area of low pressure formed in the vicinity on June 13 . The system moved northwestward into the Gulf of Mexico and developed a well @-@ defined circulation on early June 16 . Because the system was already producing tropical storm force winds , it was immediately classified as Tropical Storm Bill while situated about 200 mi ( 320 km ) from the US . Initially continuing northwestward , Bill re @-@ curved west @-@ northwestward later on June 16 . Around 12 : 00 UTC , the storm peaked with winds of 60 mph ( 95 km / h ) and a minimum pressure of 997 mbar ( 29 @.@ 4 inHg ) . Just under five hours later , Bill made landfall near on Matagorda Island , Texas , at the same intensity . The cyclone weakened to a tropical depression and turned northward early on June 17 . However , possibly due to the rare brown ocean effect , Bill remained a tropical cyclone until late on June 18 , when it degenerated into a remnant low over eastern Oklahoma . The remnant low moved east @-@ northeastward until dissipating over West Virginia on June 21 . 
