HypeScale is an unit of measure indicating the overall hype level of Tropical Activity in the Atlantic Basin.
This was created after some effort answering the question "How much concern over X situation exists right now?" This includes media response, mentions, activity at this site, other hurricane and weather related sites, and general hit count. It is a measure not of how much actual concern for a system should be, but how the general response to a system is.
This is recorded over time.
For example during Katrina's approach the hype scale would have registered and 8 or so, dropped off during the evening, then spiked up closer to 9 or 10 when news of levees and Gulf Storm surge started to come in.
Why record this type of thing? To see patterns of what draws attention to the public and what is right/wrong with over or under hyping a situation.