üWhat is a thunderstorm?
ü A cumulonimbus with lightning and thunder!
üSeveral km deep layer of conditionally
unstable air is
necessary to produce a cumulonimbus. Unstable layer lasts until:
ü -Parcels rise far enough to condense into clouds.
ü -Once the cloud topped thermals penetrate into the conditionally unstable layer,
thunderstorms rapidly
develop and the instability is
released.