Nekaro Activity Index

The Nekaro Activity Index is a method of calculating the activity of a hurricane season. It is a much simpler alternative to the Accumulated Cyclone Energy index. It accounts the intensity of storms, but does not account for how long they lasted for.

The average Atlantic NAI is roughly ~20 units. Conversely, the average East Pacific NAI is roughly ~30 units.

Calculation
Tropical and Subtropical Storms are given 1 point.

Minor hurricanes (Category 1 or 2) are given 2 points.

Major hurricanes (Category 3 and greater) are given 3 points.

Tropical depressions do not receive any points.

Example: The 2014 Atlantic Hurricane Season had 8 named storms, 6 hurricanes, 2 of which were major hurricanes. The calculation would be 8 + 6 (1) + 2 (1) = 16. The 2014 Atlantic hurricane season had a NAI of 16 points.

Another Example: The 2005 Atlantic Hurricane Season had 27 named storms, 15 hurricanes, and 7 major hurricanes. The calculation would be