Severity of Turbulence Severe turbulence is characterised by large, abrupt changes in attitude and altitude with large variations in airspeed. There may be brief periods where effective control of the aircraft is impossible. Loose objects may move around the cabin and damage to aircraft structures may occur.

In aviation standards, "Severe" turbulence is a specific classification that is rare but unmistakable. You know turbulence is severe when the aircraft experiences large, abrupt changes in altitude or attitude, and the pilot may momentarily lose "positive control" of the plane. For a passenger, the primary physical indicator is being violently forced against your seat belt. Unsecured objects, such as tablets or meal trays, will be "tossed about" the cabin rather than just rattling. In severe turbulence, walking becomes impossible, and the flight crew will immediately take their seats. This differs from "Moderate" turbulence, where you feel a definite strain against your belt and walking is difficult but not impossible. Despite the terrifying sensation and the large variations in airspeed, modern 2026 aircraft are engineered to withstand forces far beyond those found in severe turbulence; the primary risk is almost exclusively to unbuckled passengers who may strike the ceiling or overhead bins.