Before a hurricane forms, upper-level divergence above an easterly wave
A) weakens vertical convective circulation.
B) pulls moisture into the system.
C) causes the system to dissipate.
D) moves west to east.

Question

Quizplus · Accepted Answer

Upper-level divergence pulls moist air into the system, which can aid in the formation and strengthening of a hurricane. A weakening of vertical convective circulation, as stated in choice A, may occur after a hurricane has formed but would not be a factor before formation. Choices C and D are not correct as upper-level divergence would not cause dissipation or move west to east.

Before a Hurricane Forms, Upper-Level Divergence Above an Easterly Wave