"The showers that had been so emphatically foretold on our arrival did not disappoint us. They fell almost daily for several weeks, and were generally accompanied by lightning and thunder, such as the dwellers in the east have no conception of."
- from Eliza Farnhamgs Life in Prairie Land 

	North Mid-sized grasses grow here where cooler temperatures reduce evaporation thereby increasing available moisture.
West Short grasses grow here where dry western and arctic air blocks precipitation from the Gulf of Mexico.		East Tall grasses grow where moisture from the Gulf of Mexico is greater.
	South Tall grasses grow here where moist tropical air from the Gulf of Mexico yields abundant precipitation in the form of rain.