The amount of humidity is mostly affected by the moisture content of the air. As the air over a given surface becomes lighter and hence it rises and the cold air similarly reduces the temperature and thus leads to the lower humidity levels.
As the humidity occurs in the forms of dew, fog or rainfall and is directly related to the rise and fall of the tempestuous. Thus hot environment s have higher moisture content thus leads to more humidity conditions.
A tornado watch is issued when the conditions are ideal for a tornado to form and covers a broad region. Tornado warnings are when a tornado has been spotted or appears on the radar.
