Describe four different types of weather forecasting methods and give an example of each

Answer 1

A persistence forecast is a prediction that future weather will be the same as present weather. If it is snowing today, a persistence forecast would call for snow through tomorrow.
A steady-state, or trend forecast assumes that a surface weather system will tend to move in the same direction and at approximately the same speed as they have been moving, providing no evidence exists to indicate otherwise. For example, a trend forecast would predict that a cold front moving eastward at an average speed of 30 mi/hr and located 90 mi west of our location should pass by in three hours.
A forecast that relies on the analogue method assumes that existing features on a weather chart(s) may strongly resemble features that produce certain weather conditions sometime in the past. A forecaster might look at a prog and recognize the weather situation and base the forecast on this prior knowledge.
A probability forecast uses climatological data and makes forecasts based on the average of past climate data (usually 30 years). For example, an area that has experienced snow at a certain time in the past 30 years 90% of the time would most likely receive snow again this year.