Alas, those meteorologists who actually know better aren't allowed to exercise scientific caution. "Weather forecasting in this country is dictated by news directors," Grenci explains. If a competing station is predicting calamity, viewers are going to switch, so it's time to dire up your own forecast to keep them. A couple of Grenci's former students who have attempted to be more responsible about their forecasts have been threatened with sacking. "Weather forecasting," he sighs, "has become a fast-food science."