Can forecast accuracy be improved by using multiple weather forecast services?
It depends. For example, IF you know for certain that forecast A consistently overforecasts the weather while service B consistently underestimates it, then taking a weighted average will yield a more accurate forecast. However, whenever this (rather stringent) condition is not met, then the averaged forecast will be better than the worst performing one but worse than the best performing forecast. In short, you cannot improve the accuracy, unless you have additional information which you can take advantage of. There is no such thing as a free lunch. However, given alternatives, you have the option of choosing a better performing forecast, based on your observations of local weather conditions. So, if you receive multiple forecasts, we recommend continually monitoring the forecasts and simply choosing the best performing one for your work. Continuous monitoring is important because no forecast service gets it right all the time, especially when it comes to severe weather. Having said th
