Intresting 2005 season related site

[Astro_man92]

This is a very intresting web page by Wikipedia that is related to the 2005 hurricane season that I wanted to share with you guys

2005 Atlantic hurricane season statistics (Click here)

[Ixolib]

According to that graph, "ten" was its own system. I'm wondering, though, if "ten" did or did not actually become Katrina, and therefore should not have its own category??

[Matt-hurricanewatcher]

Ten=Katrina....I fellowed tropical depression across in pretty sure that it became Katrina. I knew that depression was a fighter but could not of thought it would do that.

[WindRunner]

Ten=Katrina....I fellowed tropical depression across in pretty sure that it became Katrina. I knew that depression was a fighter but could not of thought it would do that.

But, officially, it wasn't the same system, no matter whether it really was the same or not.

[senorpepr]

Katrina was not solely 10L.

The complex genesis of Katrina involved the interaction of a tropical wave, the middle tropospheric remnants of Tropical Depression Ten, and an upper tropospheric trough. This trough, located over the western Atlantic and the Bahamas, produced strong westerly shear across Tropical Depression Ten, causing it to degenerate on 14 August approximately 825 n mi east of Barbados. The low-level circulation gradually weakened while continuing westward, and it eventually dissipated on 21 August in the vicinity of Cuba. Meanwhile, a middle tropospheric circulation originating from Tropical Depression Ten lagged behind and passed north of the Leeward Islands on 18-19 August. A tropical wave moved through the Leeward Islands and merged with the middle tropospheric remnants of Tropical Depression Ten on 19 August, forming a large area of showers and thunderstorms north of Puerto Rico. This activity continued to move slowly northwestward, passing north of Hispaniola and then consolidating just east of the Turks and Caicos during the afternoon of 22 August. Dvorak satellite classifications from the Tropical Analysis and Forecast Branch (TAFB) of the Tropical Prediction Center (TPC) began at 1800 UTC that day. The upper tropospheric trough weakened as it moved westward toward Florida, and the shear relaxed enough to allow the system to develop into a tropical depression by 1800 UTC 23 August over the southeastern Bahamas about 175 n mi southeast of Nassau. The depression was designated Tropical Depression Twelve rather than “Ten” because a separate tropical wave appeared to be partially responsible for the cyclogenesis, and, more importantly, the low-level circulation of Tropical Depression Ten was clearly not involved.

[Pearl River]

Ten was it's own system. Katrina was twelve and so stated in the report.

from NHC Katrina report

The depression was designated Tropical Depression Twelve rather than “Ten” because a separate tropical wave appeared to be partially responsible for the cyclogenesis, and, more importantly, the low-level circulation of Tropical Depression Ten was clearly not involved.