Cats sleep more than almost any other mammal. Realistically, your cat sleeps about twice as much as you do. How much an individual cat sleeps depends on his age, hunger, the temperature and the weather. Like humans, cats go through both Rapid Eye Movement (REM) and non-REM sleep. Although no one can actually ask a cat, the assumption is that your cat dreams during REM sleep. You may notice his whiskers twitch or his eye moving behind his eyelids. The deep non-REM sleep is when the cat's body grows and repairs itself. (from web)
Now that hurricane Irene has left, I wish you all a good sleep.