Types of severe storms
In addition to supercells,
the atmosphere generates a number of different types of
severe storms. A large class of these storms are called Mesoscale Convective
Systems. They appear in
many forms and include:
- Squall lines
- Bow Echoes
- Mesoscale Convective Complexes
- A squall line may be thought of as
any line of convective cells.
- It may be a few tens of kilometers
long or 1000 km long (>500 nm)
- there is no strict size
- Squall lines are usually composed
of a series of ordinary cells spread along and
behind the leading edge of the system.
- However, a squall line may also be
composed of a series of supercells.
- Behind the leading edge of the
squall line is often an extensive region of
Explain why squall-line thunderstorms often form ahead
of advancing cold fronts but seldom behind them.