what are three common methods used in weather forecasting and please give a brief description of each.?

Answer 1

Persistence, prediction is based on what is happening now.
Trends, speed and direction of fronts are determined to predict where they will be in the future.
Climatology, averages weather on this date in history to make predictions.
Analog, compares today's scenario and with similar scenarios in the past.

Answer 2

There is only one form of weather forcasting. Its Chuck Norris. He tells the weather what to do. And it does. Or he 360 degree roundhouse kicks Mother nature. In the face.