How often do tornadoes occur in this area on average per year?

• A. 1 time a year
• B. 3 times a year
• C. 5 times a year
• D. 7 times a year

Answer: (B)

Understanding average annual tornado frequency means using long-term records to find the mean number of events per year. You count all tornadoes in the area over many years, add them up, and divide by how many years you looked at. This smooths out year-to-year ups and downs to give a typical expectation.

In this area, the historical data show a moderate level of activity, yielding about three tornadoes per year on average. That makes three the best estimate for the long-run typical frequency. Remember, some years will have more and some fewer, but the average captures the general rate over time.

If you see numbers like one, five, or seven, those are either underestimating or overestimating the typical rate for this area based on long-term records, which is why three fits best here.