E-mail hoax? Amazing cloud formations before Katrina. Part I

UPDATE: O.K., I originally bit on the e-mail I received that contained these pictures. They were pretty astounding. But, I admit, even in this day and age, I am still a pretty gulliable person. It appears that these are fake. I haven't researched this. Photoshopped? Real pictures but nothing to do with Katrina? I don't know.

I was originally just going to delete these posts. However, the pictures themselves are so cool, I think I will retain them, just for the artistic value.

Here is the probable source of these pictures.

http://www.ireneeng.com/2008/05/22/sky-before-katrina-struck/

Please see Part II for... Part II.