Hi does anyone know any web sites that show what different clouds look like on Infra red and visible satellite pictures??

Infra red satellite images are used because clouds at different altitudes have different temperatures. Because clouds are partly classified by there altitudes infra red images are useful in identifying cloud types.

Sorry have no links..

Inka,

Do you mean websites like this one?

Visible Earth (http://visibleearth.nasa.gov)