Overview: Factual story of Hurricane Diane, showing how the United States Weather Bureau operates in all its phases, from the storm's inception through a 24-hour vigil until danger is past. It shows the effects of the storm on two people, Josephina, a young girl, and Sebastiano, her brother in Winsted, Connecticut. The action switches from the Weather Bureau where Reinhardt Schmidt, chief forecaster, is charting the hurricane and the home of Josephina and Sebastiano. The storm gains in intensity as she, recently arrived from Italy, plans her first American picnic. Josephina is drowned.