By the 1st, two competing surface circulations merged, and a tropical depression formed. Weather Underground provides tracking maps, 5-day forecasts, computer models, satellite imagery and detailed storm statistics for tracking and forecasting Major Hurricane Allen Tracker. Lower fuselage radar scan from NOAA P3 flight into Hurricane Allen on Aug. 7, 1980. By the morning of the 2nd, the system strengthened into a tropical storm, and then rapidly into a hurricane by that evening.

Hurricane Allen - August 1-14, 1980 A tropical disturbance moved off the African coast on July 30th. The storm was already a category Allen provided a trove of scientific information. However, Allen caused nearly US$300 million in damage at landfall, nearly a third of that as a result of a hurricane-spawned tornado in Austin.