fireball nnw of city as bright as a streetlight falling at a

wife a middle school teacher and I were taking our nightly walk on the field at highlands middle school kennewick washington. When she pointed out to me a object of bright light falling though the cloud cover nnw of where we stood. I focus my eyes on it and saw it chang colors from a blue/green though green to yellow before it went out. It was as bright as a street light seen in light fog from a range of forty feet. It fell at about angle of 70degs from 30degs off the horizon to about 10degs off the horizon.