If you ride, you know that you feel cooler when you are moving forward. This is due to the effect known as Wind Chill Effect. The index which shows how much heat loss occurs due to wind is called Wind Chill Temperature Index. On November 1, 2001 NWS implemented a new Wind Chill Temperature (WCT) Index which replaced the old one which had been in general use since 1945.

The Old Index Table:





The New Index Table:





A Chart Comparing the Old and New idices: