The correct answer is : The average number of tropical storms per season for the time period 2005-2014 was 19 and the average number of hurricanes per season for same period was 9 and major was 4.
What is called tropical storms?
- If the circulation continues to intensify and the wind speeds exceed 63 km (39 miles) per hour, then the system is called a tropical storm
- Once the maximum wind speed exceeds 119 km (74 miles) per hour, the storm is classified as a tropical cyclone.
What is called hurricanes ?
- Tropical cyclones with maximum sustained surface winds of less than 39 miles per hour (mph) are called tropical depressions.
- Those with maximum sustained winds of 39 mph or higher are called tropical storms.
- When a storm's maximum sustained winds reach 74 mph, it is called a hurricane.
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