Energy dissipation method and and Iterative Bulk Aerodynamic Method (IBAM) are used to estimate friction velocity (u*) for a wide range of (5.66 to 21.6 ms-1) with convective atmospheric conditions over the ocean during the Genesis of Atlantic Lows Experiment (GALE). Values of u* obtained by the IBAM are in reasonably good agreement with those from the dissipation method. The iterative bulk method appears to do well for wind speeds up to about 21 ms-1. ¿ American Geophysical Union 1988