What does 'Feels Like' mean.
A formula is used to
calculate the 'feels like' temperature using the actual
air temperature and adjusting this with the understanding of wind chill
when the temperature is low and the heat index when temperatures are
A system called the Joint Action Group for Temp
Indices is used to measure wind chill. This calculates wind chill by measuring how much heat is lost from a person's bare face at a walking speed of 3mph. In high winds the temperature feels much colder and the body looses heat faster through any exposed skin.
- Heat Index combines air temperature and relative humidity to give a perceived equivalent temperature or ‘how hot it feels’. The human body normally cools itself by perspiration which evaporates and cools the skin. When the relative humidity is high evaporation is less effective and the body cools at a lower rate making the
temperature feel hotter.