Understanding "Wind Chill Factor"

https://www.facebook.com/HealthVermont/photos/a.172010419500430.37378.168922826475856/883305738370891/?type=1&theater

Vermont Department of Health

 

"Wind chill" might be something we need to understand this week.

 http://www.bt.cdc.gov/disasters/winter/pdf/extreme-cold-guide.pdf page 8