Wind-Chill Temperature

Chart

  AIR                        WIND SPEED (MPH)
 TEMP(degF)    5     10     15     20      25      30      35      40
 _______________________________________________________________________

   40         37     28     23     19      16      13      12      11
   30         27     16      9      4       1      -2      -4      -5
   20         16      3     -5    -10     -15     -18      -20    -21
   10          6     -9    -18    -24     -29     -33      -35    -37
    0         -5    -22    -31    -39     -44     -49      -52    -53
  -10        -15    -34    -45    -53     -59     -64      -67    -69
  -20        -26    -46    -58    -67     -74     -79      -82    -84
  -30        -38    -58    -72    -81     -88     -93      -97   -100
  -40        -47    -71    -85    -95    -103    -109     -113   -115

	

	
 Explanation 
      The wind-chill temperature is a measure of relative discomfort due
 to combined cold and wind.  It was developed by Siple and Passel (1941)
 and is based on physiological studies of the rate of heat loss for
 various combinations of ambient temperature and wind speed.  The wind-
 chill temperature equals the actual air temperature when the wind speed
 is 4 mph or less.  At higher wind speeds, the wind-chill temperature is
 lower than the air temperature and measures the increased cold stress
 and discomfort associated with wind.

      The effects of wind-chill depend strongly on the amount of
 clothing and other protection worn as well as on age, health, and body
 characteristics.  Wind-chill temperatures near or below 0 F indicate
 that there is a risk of frostbite or other injury to exposed flesh.
 The risk of hypothermia from being inadequately clothed also depends on
 the wind-chill temperature.