The quality and effect of the weather forecasting and the predictive evaluation in the United States are introduced in this paper. It is shown that the present forecasting level is higher than that 15—20 years ago according to the test for the qualities of the day-to-day weather forecasts (1967—1985) in the U. S. National Weather Service. Especially. It is worth to notice that the level of the objective weather forecasts has been raised significantly, it is worth to notice that the level of the objective weather forecasts has been raised significantly. It is a complex problem with the predictive evaluations. The gain-loss value in response to ‘Yes’ or ‘No’ for weather forecasts and its economic evaluation to the U. S. are summarized and discussed