The analysis incorporated new observations of vertical profiles in the ABL from six meteorological stations in the Gulf of Mexico. These stations include 915-MHz radar wind profilers (RWP), 2-KHz Radio Acoustic Sounding Systems (RASS), and surface meteorological stations. Two stations collected ABL data for three years from May 1998 through October 2001, and four stations collected data from September 2000 through October 2001. The RWPs and RASS measure winds and virtual temperatures (Tv), respectively, from near the surface to heights of a few kilometers, and the surface stations measure skin temperature as well as wind speed, wind direction, air temperature, and water vapor mixing ratio at an elevation of about 25 m on an oil platform. In addition to the new data from the vertical profilers, routine meteorological observations from buoys and from shoreline stations were included in the analysis.