windflaw

noun

1. A sudden, strong current of wind; flaw.

   “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.”

   “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.”