Hypothetically, if the Earths atmosphere could be made absolutely equal and uniform in pressure, temperature and humidity, everywhere at once, before starting time, could you make a weather forecast?

https://www.quora.com/Hypothetically-if-the-Earths-atmosphere-could-be-made-absolutely-equal-and-uniform-in-pressure-temperature-and-humidity-everywhere-at-once-before-starting-time-could-you-make-a-weather-forecast