Storm systems generally move in from the west. A red sky at night, indicates high pressure and stable air coming in from the west. The red sky is a reflection of the high concentration of dust particles. In layman's term, good weather will follow.
However, a red sunrise indicates that a storm system may be moving to the east. This is because a red sunrise is a reflection of the dust particles of a system that has just passed from the west. A deep fiery red morning sky often means there is a high concentration of water in the atmosphere, ie. rain is on its way.