Posted above is the latest prediction from the Weather Research Center. The highlighted areas represent (I believe) the probability of a land falling hurricane over the course of the entire hurricane season.
According the to the WRC, the central Gulf Coast will have the highest risk compared to normal. During a typical year, this area has a 59% probability of a hurricane strike. The WRC is pegging this year's probability of a hurricane strike (in Louisiana and Alabama) at 70%.
Following is how they describe the methodology used in developing the forecast:
The Houston-based Weather Research Center is one of a handful of organizations that make seasonal hurricane predictions. WRC
uses a model called Orbital Cyclone Strike Index (OCSI) which uses the
solar cycle [an indication of the solar system’s orbit] to predict the
risk for coastal residents each hurricane season. The OCSI model is
based on the premise that there are orbital influences that are
reflected in the global circulation pattern on the sun as well as the
global circulation pattern of the earth. These orbital influences are
reflected in the 11.1 year sun spot cycle.
To read their entire assessment, click here: Weather Research Center 2009 Hurricane Outlook
For my analysis of all the publicly released hurricanes, click here: 2009 Hurricane Season Update Three
I'll be updating the consensus forecast later this week following the public release (3/18) of AccuWeather's initial outlook.