In Back to the Future II, it starts out as pouring with rain when they arrive in 2015. When they land, Doc goes to get out but Marty protests, saying it's raining too much. Doc then looks at his watch and times perfectly the stop of the rain. Doc then attributes it to the excellence of the Weather Service and complains its a pity about the postal service not being as effective. The weather changes from pouring with rain to a nice sunny day. This seems a bit too fast and unnatural (see below video).
My question is, did the Weather Service improve predictive power substantially to provide such accurate results, or did they in fact control the weather?