How did the events develop? What happened on 23rd August? What happened on 25th August?

This question refers to the events surrounding Hurricane Katrina. Here's a general outline of how those events developed:

1. August 23rd: Tropical Depression Twelve formed over the Bahamas.
2. August 24th: The depression strengthened into Tropical Storm Katrina.
3. August 25th: Katrina made landfall in South Florida as a Category 1 hurricane, causing some damage. It then moved into the Gulf of Mexico.