Examples from the Web for downwind
Poison comes out of a smokestack and, downwind, birds fall from the sky.Green Politics Has to Get More Radical, Because Anything Less Is Impractical|Jedediah Purdy|April 26, 2014|DAILY BEAST
And when a buffalo ran, he ran into the wind, not downwind, like the deer.The Young Alaskans on the Missouri|Emerson Hough
Well, just remember this then, never make a downwind landing with a seaplane in a wind blowing over eighteen miles an hour.Dorothy Dixon Wins Her Wings|Dorothy Wayne
Note that this was downwind for him, and that rhinoceroses usually escape upwind.The Land of Footprints|Stewart Edward White
The downwind portion of the dune, the lee slope, is commonly a 35 steep avalanche slope referred to as a slipface.
Saltation is downwind movement of particles in a series of jumps or skips.