Shelf Cloud Over Saskatchewan APOD

Shelf Cloud Over Saskatchewan, Canada APOD 1/22/2008*
Beautiful photo of Shelf Cloud Over Saskatchewan by Jeff Kerr shows a beautifully orange lit shelf cloud on August, 2001.
Nice explanation of the weather activity and how this formation differs from wall clouds.
http://antwrp.gsfc.nasa.gov/apod/astropix.html

(*if not 1/22/2008 look in archives for the date)
Also thunderstorm development over Kansas time lapse on Youtube
http://www.youtube.com/watch?v=NZXW2IIziMM&NR=1
more
a nice photo of a lenticular cloud over Hawaii
http://antwrp.gsfc.nasa.gov/apod/ap050821.html
http://sa1.star.uclan.ac.uk/~prn/lenticular/clouds.html
also nice webpage about different type of clouds
http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cld/cldtyp/home.rxml