Just started noticing when I start the car and then turn on the AC it makes a metalic screech for a split second, I know about the clutch on the AC however this only happens when the car has been sitting all day when I get off work after that I can drive it go work and come out and it won't make the sound. Any ideas?

 

temperature dependant belt squeal. ahve it checked to make sure it isnt the ac clutch/pulley