Exam 10: Thunderstorms and Tornadoes

The so-called Tornado Belt, or Tornado Alley, of the United States is located ____.

What are microbursts?

In some situations, individual thunderstorms may organize into a convective weather system that may be 1000 times larger than an individual storm.

How do flash floods differ from river floods?

The signal detected by a Doppler radar is a ____.

What is a squall line? Where would you expect squall lines to form?

A relatively narrow downburst, less than four kilometers wide, is called a ____.

When caught in a thunderstorm in an open field, what action is best to take?

In the United States, dryline thunderstorms are most common ____.

What weather system can grow to be as much as 1000 times larger in area than an ordinary cell thunderstorm, even large enough to cover an entire state?

What is a dryline and where do they tend to occur most often in the United States?

Even if distinctive features that might indicate a tornado are observed on radar, a tornado must be observed visually before a tornado warning is issued.

The Enhanced Fujita scale pertains to the ____.

The top of a thunderstorm is normally ____ charged, and the middle and lower parts are ____ charged.

Ordinary cell thunderstorms only last about one hour and begin to dissipate when ____.

Instructions: Choose one answer from each pair of selections. In ordinary cell thunderstorms, when the downdraft begins to expand laterally in the cloud, the thunderstorm will usually begin to STRENGTHEN | WEAKEN.

The initial stage of an ordinary cell thunderstorm is the ____.

A small thunderstorm cloud blowing dust at the ground could warn of a severe hazard to aircraft. Why?

Which statement about tornadoes is correct?

When tornadoes are likely to form during the next few hours, a ____ is issued to notify the public.