Additional information
FEMA has compiled a number of example projects however residential design is not covered as deeply as commercial buildings.
Safe Rooms and Community Shelters Case Studies
http://www.fema.gov/plan/prevent/bestpractices/casestudies.shtm
Other resources include
Texas Tech University, Wind Science and Engineering Research Center
10th and Akron, Lubbock, TX 79409 806.742.3476
http://www.wind.ttu.edu/Shelters/Shelters.php