Wind gusts appear to be random anyway.
Here's an experiment, 1) set the wind direction at 272 for the world.scn, 2) set the wind gusts at 5 m/s (11.2 mph), 3) hold down the throttle off key (H), 4) initialize the model (I).
My models then dance all around from different directions until they get flipped over or crash some other way.
Usually gusts less than 1 m/s effectively simulate very gusty conditions with gusts about .25 m/s very realistic. Remember that gusts are added to the constant wind speed.
-- ggunners