Start by learning to identify cloud forms and how they may affect weather. This may feel like your kid's eighth-grade science project, but it's a necessary first step. Although there are infinite shapes a cloud can take, the common classification system includes 10 types: cumulonimbus, cumulus, stratus, stratocumulus, nimbostratus, altostratus, altocumulus, cirrostratus, cirrocumulus, and cirrus. It's important to learn the characteristics of each cloud type. Books such as Chapman Piloting offer a good overview and helpful pictures. Next, watch how clouds form in your area, determine whether they are increasing or decreasing in amount, and understand what shape they are taking. As a general rule, lowering or thickening cloud formations indicate wet weather is on the way. Then, begin to combine this information with other items such as barometric pressure and wind velocity.