On July 19th, a tropical wave between the Dominican Republic and Puerto Rico, was expected to develop as it moved
to the west-northwest. Accompanied by a large area of showers and thunderstorms, the system began to organize
as it entered the Gulf of Mexico on the 22nd, when a surface low formed and the system took on a more westward track.
On the 23rd, the low met the definition of a tropical depression while south of Louisiana. That night, the depression
strengthened into a tropical storm named Hanna. The storm steadily strengthened as it approached South Texas,
becoming a hurricane early on the 25th. Hanna strengthened until it made landfall on Padre Island later that
day. Weakening ensued as Hanna moved inland, and on the 26th it regained tropical storm, then tropical
depression status as it moved into northeast Mexico and ultimately dissipated.
The graphics below show the storm total rainfall for Hanna, which used rain gage information from the National Weather
Service River Forecast Centers, Forecast Offices, and CoCoRAHS.
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