Thunderstorms are most common in the:

• northwest U.S.
• southwest U.S.
• southeast U.S.
• southwest U.S.

Name the three necessary ingredients for thunderstorm formation.

• Lifting Mechanism, Fronts, Moisture
• Moisture, Lifting Mechanism, Instability
• Lifting Mechanism, Mountains, Oceans
• Stability, Moisture, Heat

An air mass is unstable when cool dry air is near the surface and warm moist air is aloft.

• TRUE
• FALSE

Where is terrain most likely to be a source of lift for thunderstorm development?

• Great Plains
• Corn Belt
• Rocky Mountains
• Coastal Plain

The first stage of a thunderstorm is the...

• Cumulus stage
• Mature stage
• Dissipating stage

The most likely stage for large hail and damaging winds is the...

• Cumulus stage
• Mature stage
• Dissipating stage
• Hail stage

The type of thunderstorm that produces nearly all of the significant tornadoes is the...

• Thunderstorm cluster
• Squall line
• Single cell
• Super cell

The clouds in this image are most representative of what stage in the life of a thunderstorm?

• Mature stage
• Dissipating stage
• Growth stage
• Cumulus stage

A SEVERE Thunderstorm is one that produces:

• Lightning
• Wind gusts to 50 mph and marble-size hail
• Tornadoes
• Flash floods

The #1 killer among thunderstorm hazards is...

• Lightning
• Tornadoes
• Large Hail
• Flash flooding