Definition of "windflaw"

The front of the wind on the water was a solid, sharply defined strip of dark-coloured, wind-vexed water. In advance of this strip, like skirmishers, were flashes of windflaws.

1912, Jack London, chapter 8, in A Son Of The Sun

The smoke seemed to cover them all halfway to the house, but then it twisted away on a windflaw and lifted like a stage curtain.

2008, Willie Nelson,, Mike Blakely, A Tale Out of Luck: A Novel‎