Unlike radiation frost, which is localized and settles in low-lying pockets, advection frost is a regional event. It is characterized by —often exceeding 5 mph—and low humidity. Because the cold is carried by the wind, it doesn't just "settle"; it sweeps across the landscape, stripping heat away from everything in its path. How It Differs from Radiation Frost
Wind machines (large fans used to pull down warm air during radiation frosts) are useless during advection events because there is no warm air "inversion" to pull from. The air is cold at every height. advection frost