Airman Wright with 18th Maintenance. Squadron saw a white speck flying in the distance to the NE, then north, then fly into a cloud bank and emerge to the NNW, approaching closer so that he saw it was a very large 300 feet long 140 feet wingspan snow-white aircraft with low wings darting in and out of clouds much faster than any jet, about 20-30 miles away about 3-6 miles high, leaving an exhaust trail like skywriting and making loud aircraft noise.

Google map of this location.