Project STORMFURY is a project of Commerce and Defense for experimenting at modification of hurricanes. Justification for the work is based on recent discoveries about hurricanes and the high potential benefit to cost ratio of the experiments. Evidence is presented that two approaches for modification should be considered: 1) seeding of clouds, and 2) inhibiting evaporation from the ocean. The scientific aspects and logistic problems of both approaches are reviewed. The Program and goals of Project STORMFURY are discussed.