I always enjoy those lens shaped clouds known as Lenticular clouds, and it makes me think about the wind that creates them. The big ones like these also make me thankful that I’m enjoying them from the ground and not from the air.
These were taken in the Spring of 2011 from near Placerville looking east towards the Crystal Range of the Sierra Nevada.
West Coast Flying Adventures 
Great pics Ney. The black and white of the clouds is incredible. Looking forward to more Baja adventures in the near future.
-Tim I.
Great blog and pics.
Please have a look to mine: http://mobablog.wordpress.com/, you will find an app for iphone thought mainly for outdoor activities.
I hope you will like it and will find it useful.