Dust devils

Dust devils are dust-filled vortices (whirlwinds) created by strong surface heating, generally smaller and less intense than a tornado (AWH 16.2.6.3.1).

• Where: usually at the interface between different surface types (asphalt and dirt, irrigated fields and dirt roads). Typically clear skies and light winds.
• Life: usually a few minutes.
• Strength: can lift debris, damage or destroy small structures.
• Visibility: not all easily visible; some carry little or no debris.
• Action: avoid; never fly through one. Scan takeoff and landing areas.

Trap: treating a dust devil as harmless because it is smaller than a tornado, or assuming a clear view means none is there.

Practice