What is the average annual number of thunderstorms in the region?

• A. 30 thunderstorms per year
• B. 70 thunderstorms per year
• C. 50 thunderstorms per year
• D. 10 thunderstorms per year

Answer: (C)

The main thing this question tests is understanding what an average annual count represents. The average annual number of thunderstorms is a long-term mean, calculated by tallying every thunderstorm over many years and dividing by the number of years. In this region, warm, humid air and regular lifting produce thunderstorms with enough frequency that, when you smooth out year-to-year variability, the count sits around 50 per year. That mid-range reflects a moderate level of convective activity: storms are common but not overwhelming. If you saw numbers like 10, 30, or 70, they would imply unusually quiet, moderately low, or unusually stormy conditions, respectively, which is less representative of a typical year here.