Solar Panel Designs are now requiring the use of the updated American Society of Civil Engineers code requirements for uplift connection and lateral stability. The updated code is ASCE 7-10 Windspeed Map.
All structural designs within the United States will shortly require the use of the updated Factored Windspeeds, known as Strength Level.
Design Criteria site has both the ASCE 7-05 and ASCE7-10 design wind map values easily accessible online.