When Desert Storm began, I was on active duty with the USAF stationed at the Air Reserve Personnel Center in Denver. We had the job of calling the selected reserve personnel to active duty.
I had no access to anything classified in this regard, but knowing that the reserve call-up was nearly complete, and playing with other factors, I predicted the date and hour of the attack on Baghdad many days in advance. (Actually, I was 40 minutes off because I did not factor in flight time from Riyadh to Baghdad.) So I really only predicted take off time.
It wasn't too difficult to consider: troops in place, the phases of the moon, Islamic holidays and a general hunch.
Anyway, I was watching Dan Blather at about 20:40 MST as the bombs started falling on Baghdad. I had predicted they would start at 20:00 MST.