... of data available for verifyingforecasts. The changes in data include changes of observing stations,changes of location and type of recording instruments at a station, and anincreasing range ... techniques, are also used.There is a constant need to adapt practices, as forecasts, data and usersall change. An increasing number of variables can be, and are, forecast, and the nature of forecasts ... often measured in oktas. On the other hand, cloud type is a nominal variable since there is no natural ordering of the categories. The simplest kind ofcategorical variable isa binary variable,...