The maximum height of the unstable layer in which Cloud Streets form can be
2.5 km
1.5 km
0.5 km
2.5 km
. The windspeed in the middle part of the unstable layer should be at least
20 kt
30 kt
40 kt
20 kt
. A maximum of Cold Advection can ussually be found
below
above
below
the subsidence inversion.