Question 256563
I am having trouble understanding your formula.
 What is \/v?
What is the 110 doing there?
What does "v+wind velocity" mean?
According the the wikipedia article on windchill
10F 15 mph wind is -7 that is 7 below
20 25 mph wind  is 3 above
The article also points out that time out , wetness and other factors contribute to "coldness"