Examples of these include biases inserted by the scientist themselves to produce a successful conclusion, the suppression or alteration of a work by the publishers and editors of scientific journals, as well as a general disregard of an experiment by the scientific community itself. So although the scientific method may arguably be the best method of deriving the truth that we currently possess, we must be on guard in giving complete confidence, especially in matters that concern the well being of humanity, to it. We should always make sure to examine any conclusions for ourselves and refrain from applying it until we are very certain of its validity as well its necessity. The outlook contains colored lines to outline areas where severe thunderstorms could occur. There is a class structure to the colors.
Sleet occurs when snow falls from a cloud and melts on the way down.
Also when rain falls from a cloud towards a ground or lower atmosphere cold enough to freeze it. A front is a boundary between cold and warm air masses. A cold front means that a cold air mass is advancing towards a warm air mass. The cold front lifts the warm air up, which cools the air, and depending on the relative humidity, produces clouds and eventually rain. Most precipitation is found around the cold front.