Many flash floods, including the one that occurred in Colorado's Big Thompson Canyon, are the result of thunderstorms that
a. contain no lightning.
b. form in a dry air mass.
c. move slowly.
d. have weak or non-existent downdrafts.
e. lack the dissipating stage.
Question 2
Squall lines generally do not form
a. behind a cold front.
b. when the air aloft develops waves downwind from a cold front.
c. along a cold front.
d. in the warm sector where warm, dry air meets warm, humid air.
e. ahead of an advancing cold front.
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