For example, to make a low and high temperature forecast for tomorrow, find the current location of the air mass that you expect to be over the forecast site tomorrow. The first thing you want to know about your precipitation forecast location is what season is it. Winter precipitation is generally more widespread, and light to moderate. If the precipitation is in the form of snow remember liquid equivalent is roughly 10 inches of snow equals 1 inch of water. In making precipitation forecasts for an approaching winter storm be careful of the possibility of the change from rain to snow or vice versa.
Rain adds to the precipitation amount much faster than snow.
In making your temperature forecast remember the high temperature generally occurs during the late afternoon. Light winds and clear skies allow for greater heating during the day. The low temperature generally occurs early in the morning. Nighttime cloud cover or high humidity slows down the rate of cooling significantly. The heat index and wind chill images are not particularly useful for forecasting, and will not be discussed here.