Why is spring wetter than fall?

Question

In the Plains

Answer 1

That really depends on where you live. Generally speaking, precipitation amount climatologically differ from one season from another due to weather patterns created by semi-permanent pressure systems and the jet stream.

I see you're asking about the Plains. Where May is the wettest month of the year and spring is certainly wetter than the fall.

The position of the jet stream in the fall allows for more of westerly to northwesterly air flow, which is dry. Also the sources of moisture for the Plains, which are the Gulf of Mexico and the Pacific Ocean to a degree, are "closed." Meaning there is usually a high pressure preventing moisture from getting into the Plains.

In the spring, you get a nice combination of mild, moist air from the Gulf mixing with cooler air from the north. Also as the jet stream starts to migrate from the south to the north during the spring, energy is supplied to this region creating upward vertical motion and low pressure and frontal systems that allow the precipitation.

Fall: Lack of moisture.
Spring: Moisture and low pressure systems with fronts create more precip.

Answer 2

because atmospheric conditions are more favorable for major storm outbreaks, and also because The jet streams deliver more of a punch, and the air has more moisture and is thus more unstable and more conducive for stormier weather.

Answer 3

I don't know. Don't the plants start growing in spring ( they need water) and they start dieing in the fall (they don't need water). That's how i see it.