The tendency for air parcels to accelerate when they are displaced from their original position; especially, the tendency to accelerate upward after being lifted. Instability is a prerequisite for severe weather - the greater the instability, the greater the potential for severe thunderstorms. See lifted index , and sounding .
INSTABILITY
Meaning of INSTABILITY in English
A comprehensive English glossary of weather. Полный английский глоссарий погоды. 2012