For example, when the temperature is 20 degrees and the wind is 20MPH, it feels like (wind chill) 4 degrees. Here's a look at the chart that the NWS uses to calculate wind chill.

The way meteorologists gauge the wind chill changed in 2001. First Alert Weather chief meteorologist Steve Beylon explains the wind chill chart in the video above.

Wind chill chart shows when frostbite is a danger A chart from the Weather Service shows the relationship between temperature, wind and how long before frostbite occurs.

The National Weather Service Wind Chill Chart uses a model dependent on heat loss from the adult human face during controlled experiments (children could not safely be used for such studies).

Wind chill is not a true temperature, but it allows us to understand how heat is lost due to the wind.

It's finally time for the weather to turn cold, which can lead to a brisk trip on your motorcycle. With this tool, you can gauge wind chill before you ride.

The chart below from the National Weather Service shows how long frostbite takes for it to develop with varying wind speeds and temperatures.

What is a wind chill? A wind chill is a term used to describe what the air temperature feels like to the human skin due to the combination of cold temperatures and winds blowing on exposed skin.

With winter weather settling over Michigan, here's what you need to know about exposed skin as the temperature drops and winds pick up.

For example, the wind-chill chart shows how long a person can be exposed to cold, windy conditions before frostbite develops. On a day when it’s 0 degrees with 15-mph wind, the wind chill is -19 ...

Over the years, the wind chill calculation has been tweaked quite a bit, but in 2001, the National Weather Service landed on the chart you see below. The wind chill isn’t the actual temperature.

Warming centers were being opened across Maine Thursday as the state braced for bitterly cold temperatures that could see wind chills of minus 60 degrees.