Question 1

Why can thunderstorms develop near mid-latitude fronts?

Accepted Answer

A front provides a lifting mechanism for warm moist air A front is a boundary between contrasting air masses. At a cold front, denser cold air can force warm moist air upward; along a warm or stationary front, gradual ascent can also occur. If the lifted air is unstable and sufficiently moist, condensation and deep convection may produce thunderstorms.

Question 2

Why is the pattern of fallen trees examined in a post-tornado damage survey?

Accepted Answer

Signs of rotational or straight-line wind can be distinguished A damage survey examines the direction and arrangement of fallen trees, debris, roof damage, and other evidence. Rotational winds may produce converging, divergent, or varying directions of fall, whereas straight-line winds often create a more consistent directional pattern. This helps distinguish tornado damage from downburst damage.

Question 3

In which type of supercell can large hail occur with relatively low rainfall?

Accepted Answer

Low-precipitation supercell A low-precipitation supercell has a powerful, persistent rotating updraft that can suspend water droplets and ice particles for a long time. These particles may grow into large hail before falling, while the storm’s precipitation core remains relatively narrow or displaced, so the visible rainfall near the hail region can be comparatively low. Therefore, option B is correct.

Question 4

If a gust front moves far ahead of the main storm, what can happen to the original storm?

Accepted Answer

It can be cut off from fresh inflow and weaken A gust front is the advancing boundary of cool, dense air spreading outward from a storm’s downdraft. If it travels too far ahead, it may push away or block the warm, moist air that the parent storm needs as inflow. Without this sustained supply of buoyant air, the storm’s updraft weakens and the original thunderstorm may decay. Thus, option A is correct.

Question 5

Why can a tornado be dangerous even if it is not clearly visible?

Accepted Answer

Because rain, darkness, or dust can hide it while rotating wind remains Heavy rain, darkness, dust, or poor visibility may conceal the funnel visually, but the rotating winds and flying debris remain present. A hidden tornado can therefore cause severe damage without being seen clearly. People should follow warnings and shelter instructions rather than wait for visual confirmation. C is correct.

Thunderstorms and tornadoes

Practice questions

01 Why can thunderstorms develop near mid-latitude fronts?

02 Why is the pattern of fallen trees examined in a post-tornado damage survey?

03 In which type of supercell can large hail occur with relatively low rainfall?

04 If a gust front moves far ahead of the main storm, what can happen to the original storm?

05 Why can a tornado be dangerous even if it is not clearly visible?

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