A four-day forecast today is as accurate as a one-day forecast 30 years ago.Weather forecasts are often seen as just a nice thing to have. Useful when planning a Sunday barbecue, or when we want to know if we’ll need an umbrella for the day. But in many ways weather forecasts are absolutely crucial: they can be a matter of life and death.Accurate forecasts can save lives by giving early warnings of storms, heat waves, and disasters. Farmers use them for agricultural management, which can make th...