Minnesota - Fall Color Report
Kentucky - Fall Color Report
NWS Jackson, KY Webcam
NWS La Crosse, WI Webcam
Cool Autumn Weather Reveals Nature's True Hues
Fall Colors across United States - US Forest Service
Here are some helpful links for you to keep track of the fall colors across the Midwest.
|Photos above are courtesy of the Iowa DNR, the University of Illinois Extention and the Missouri Conservation Department|
|Send us colorful fall photos you want to share!|
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During the spring and summer a food-making process takes place in the leaves, within cells containing the pigment chlorophyll. This gives the leaf its green color. The chlorophyll absorbs energy from sunlight and uses it in transforming carbon dioxide and water to carbohydrates, such as sugars and starch.
In the fall the decrease in intensity and duration of sunlight, and the cooler temperatures cause the leaves to stop their food- making process. The chlorophyll breaks down, the green color disappears and the yellowish colors or other pigments already in the leaf become visible.
Autumn weather conditions favoring the most brilliant colors are warm sunny days and cool, but not freezing, nights. A few hard frosts can cause the leaves to wither and fall from the tree without changing color. The degree of color may also vary from tree to tree. Leaves directly exposed to the sun may turn red, while those on the shady side may be yellow. When warm, cloudy and rainy weather dominates the fall season, leaves tend to have less coloration. (This section compliments of NWS La Crosse)
Some trees across central Illinois are beginning to change colors during late September. Fall colors usually peak from mid October into early November across central and southeast Illinois.