Answer:
-Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere.
Aight.
It is already answered tho...
Tropical storms, humidity, and frequent rainfall.
Some of the US states that borders Canada are Minnesota, New York and Idaho
