Threat To Land (TTL) Index

The TTL Index is an extremely simple little number we will attach to every tropical storm.  It simply gives a probability of the storm hitting land.  It goes from 0-5.  Here it is:

• TTL 0: No threat to land
• TTL 1: Small threat to land
• TTL 2: Below 50% probability of hitting land
• TTL 3: More concerning of a value
• TTL 4: Likely to hit land
• TTL 5: Nearly certain that it will impact land

We will likely create an Advanced TTL Index soon, which will take into account strength, track, satellite, etc.