black dot doing circles then flying at speed out of sight.I'm standing on a hill watching a big storm roll in , blue sky and big Columbus clouds with Sun shinning on them. They must be 20 km high.I'm looking NE storm over my right shoulder Sun setting over my left with a few clouds.I spot this what I first thourght was a bird in a thermal thinking its going to get kill by this storm, was a black dot, its doing circles between two big fast growing Columbus ((sic. cumulus)) clouds .Then I new something was wrong when the dot started to head Nw at speed to still what is blue sky It did fly fast and silent. What else was weird when it took off from between the clouds, it looked so high in the sky that it must fly into the storm, but it didn't.Which made me think its smaller cause its like it flew closer than it looked, I was sure it looked it was 30000 feet in the air, not fly my side of the cloud .When it headed NW it did have speed and went in a path like a night time satellite, but they don't do circles first ....I'm good with planes, space and stuff but what I saw I couldn't tell you what it was ..((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))