You have tropical depressions, tropical storms, and once it is strong enough to become a hurricane, you have five categories.

Category five being the strongest, the state's most frequently hit by a hurricane.

Florida, Louisiana and Texas.

But as much as we know about hurricanes, forecasting them is still a challenge.

Justus.

We name each storm.

Each storm has its own personality, like Katrina in 2005 which intensified rapidly overnight, going from a Category three to a Category five, it became the fourth most intense hurricane on record.

As of that time in the forecast track can change dramatically, like Erica in 2015.

Or a system that can be viewed is relatively weak, like a tropical storm could end up like Tropical Storm Allison.

In 2001 the remnants of the storm stalled over Southeast Texas, stumping 35 inches of rain over Houston.