We needed a statistic for this? I thought it was common knowledge, kind of like water is wet, fire is hot, (weather) predictions are getting more inaccurate the longer time scale they are predicting...
Did you know that they're really only accurate a few days out? Despite the fact that most weather sites provide forecasts a week or two out.
Yes. You didn't? Because frankly I feel they get really inaccurate just two days out. No idea why there's 10 day forecasts. If you look at them every day you'll notice that 10 day forecasts change every day.