1998 Ford Mustang A/C problems?

I have a 1998 Ford mustang convertible and My A/C was blowing super cold air about 3 days ago and now all of a sudden its only blowing air thats bearly cool. Any idea of what it could be?

I don't work with ideas I work with test equipment you should to. Just watch the A/C pro commercials you'll be a expert in no time.

You are most likely low on refrigerant.