Illinois State Water Survey Illinois State Climatologist

Late December Heavy Rains, Flooding in Illinois

A large, slow-moving low-pressure system moved through the central US, bringing widespread, heavy rains to Illinois and neighboring state. This resulted in considerable flooding ranging from flooded basements to major flooding on the Mississippi River. Rainfall Maps for December 26-29, 2015 This first map shows the widespread heavy rains from Texas, Oklahoma, Arkansas, Missouri, Illinois, Kentucky, […]

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Response to Damaging Rains in Illinois: Monthly Rainfall Totals for Over 500 Sites

Recently, Illinois officials have sought a federal disaster declaration from USDA in response to the heavy rainfall and damaging flooding across Illinois during May, June, and July of 2015. Update August 12: all but one county in Illinois is eligible for federal agricultural disaster loans due to excess rain according to news reports.   In […]

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2015 Versus 1993 in the Midwest

I have had several people say that all this summer feels like 1993. If you compare 2015 with 1993 in the maps below for June 1 – July 13, you can see that in 2015 the heavy rains were more concentrated in Missouri, Illinois and Indiana (shades of light blue and pink, indicating between 12.5 […]

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So Far, Fifth Wettest June on Record for Illinois

Even before today’s rain, the statewide average rainfall for June in Illinois is 7.11 inches. That makes it the 5th wettest June on record. And June is not over. Here are the top ten wettest June totals on record and where we stand: 1902 with 8.27 inches 2010 with 7.71 inches 1998 with 7.64 inches 2000 with […]

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