The equation for approximating the wind chill factor in North America is:
wc = 35.74 + 0.6215 Ta - 35.75V +0.16 + 0.4275 Ta V +0.16 Where Ta is the air temperature in Fahrenheit V is the wind speed in mph (consider pow(windSpeed, 0.16)) Also, wind chill temperature is defined only at or below 10.0◦ C (50.0 ◦ F), and wind speeds above 4.8 kilometers per hour (3.0 mph). The program must check this. The cloud base in feet above ground level is determined by the "temperature spread" which is the difference between the temperature and the dew point, and is calculated: cloudBase = temperature spread / 4.4 1000