How far ahead can we predict the weather?

That’s because the Earth’s atmosphere is a chaotic system that doesn’t follow an easily predictable path, according to Keith Seitter, executive director of the American Meteorological Society in Boston.

“If anybody kept track about how (AccuWeather) did, they would find it’s a pretty horrible forecast,” Seitter said.

The best weather forecasters can do now is seven to 10 days. After that, accuracy drops off quickly.