(NEXSTAR) – If you're making plans for next weekend and the weather forecast on your phone looks terrible, don't panic. The high temperature forecasted by your phone may be pretty different by the time the big day rolls around.

You may have been burned by a weather app before, whether it overestimated the heat or underestimated the rain several days in advance. Jim Danner, senior meteorologist at Nexstar, explained these types of apps can be wrong for two main reasons.

First, an app is only as good as the data that's feeding it. Often, what models are being used to populate those forecasts isn't transparent to the average person, and the quality can vary widely from app to app. "Everybody wants to do a weather app now," Danner said. "So if everybody's doing it differently you're going to

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