Eastern Daylight Time on August 23, 2005. Category 5 175 mph August 29, 2005 6:10 a.
Hurricane Katrina Warm Water: The Critical Role of Sea Surface Temperatures in Its Formation
The disturbance that would become the hurricane was first identified as a tropical depression at 11:00 a. Tropical Depression Twelve 35 mph August 23, 2005 5:00 p.
Hurricane 75 mph August 28, 2005 10:00 a. Just six hours after forming, the depression had strengthened into Tropical Storm Katrina.
How Hurricane Katrina's Warm Water Fueled Its Rapid Development
This initial classification as a tropical depression marked the formal beginning of Hurricane Katrina's life cycle, a point designated by the National Hurricane Center as the official "formation" time. This combination of factors is precisely why meteorologists pay close attention to the genesis of storms—understanding when and where these conditions converge helps predict future threats.
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