The objective of this project was to determine the weather events that affect winter operational performance, then develop a software application that can automatically extract NWS data and calculate differences in weather across a region. The result of the project was a customize-able weather index online calculator. The index uses weather information from various weather networks to assess the severity of a user-defined area and time period. The user can modify the index by selecting different weights for individual weather parameters, such as road icing and blowing snow. Aurora members have unrestricted access to the online calculator for two years.