The warm days and cool night Arkansas has been experiencing is just what the state`s trees need to put on a good show of fall colors. State tourism officials say they expect leaves to produce rich colors this year. But, weather in the weeks ahead could change and that could diminish the range of color. Leaves in northern parts of the state should begin to turn at the end of September and in early October. Central and western Arkansas` color-changing should be from early to mid-October and the eastern and southern parts of the state should begin to see changes from the middle to end of October. Peak times for Arkansas are in late October for the Ozarks, late October to early November for central and western parts of the state and early to mid-November for south and east Arkansas.