DuPuis Activity Index

The DuPuis Activity Index (DAI) is a method of calculating how active a hurricane season is. The DAI created by the CDMC. The DAI is like the ACE because it takes into account how long the cyclone lasted, and how intense it was.

Calculation
Calculating the DAI is simple here are the steps... Example: A Tropical Storm lasted for 6 Days and did no damage, the DAI would be 8 DAI.
 * 1) Count how many days the Cyclone lasted.
 * 2) See how intense it was a list of how many points a cyclone will get. 
 * 3) A Tropical Depression will get 1 Point, a Tropical Storm will get 2 Points, Cat 1 and 2 get 3 points and a Major Hurricane or above gets 4 Points.
 * 4) This step is only necessary if the cyclone did over $100 Million then it gets 1 point, $200 Million= 2 Points and so on.
 * 5) After you have done steps 14, add up how many days the cyclone lasted to how many points it got for its strength. Then when you have that add that up to the damage number.
 * 6) That's the DAI

A Real Life Example: Tropical Storm Erika (2015) 2 Points + 6 Days + 5 Damage Points=13 DAI