Photo Illustration by Thomas Levinson/The Daily Beast/GettyThere’s an old joke: The weatherman is the only job you can be wrong 50 percent of the time and still keep your job. Meteorology has since improved a lot since that old chestnut was funny, but it still highlights a very real truth about weather prediction: It’s hard as hell.Meteorologists need to track and account for multiple different variables ranging from temperature, to humidity, to air pressure, and many more. These conditions can