DCHP-1 Online
smoke drift 
a drift of smoke seen at a distance as evidence of a forest fire.
See also: smoke (def. 4)
- 1962 . . . smaller smoke drifts are often easiest seen in the wee, small hours. . . .
- 1962 . . . smaller smoke drifts are often easiest seen in the wee, small hours. . . .