Mesoscale convective complexes are self-sustaining because
A) wind shear is typically absent.
B) downdrafts from individual cells become warmer as the precipitation evaporates.
C) downdrafts from individual cells rise over the outflow boundary.
D) downdrafts from individual cells combine with surface winds to create updrafts and wind shear.
Question 2
Derecho winds are strongest when
A) upper-level winds are strong, because it spreads out the downdrafts.
B) upper-level winds are strong, because their momentum is carried to the surface.
C) upper-level winds are weak, because more wind shear is created.
D) upper-level winds are weak, because less wind shear is created.
The Coriolis effect and wind direction.
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