Ohio can be a land of weather extremes. There are droughts followed by flood, arctic cold and soaring heat in one year, a Christmas warmed to 70 degrees and a Christmas white with thirty inches of snow. Ice jams on the Sandusky River and tornadoes across its southern counties, wind storms in Cleveland and floods in the Ohio River Valley inspire Ohioans to "remember when". Thomas and Jeanne Schmidlin, native Ohioans, have brought together data from government records, scientific studies, memoirs, diaries, and newspapers in the first comprehensive book on Ohio weather. They highlight 200 weather events from 1790 to the present -- extremes of rain, snow, storms, and temperature. Anecdotal, often first person, accounts are enhanced by statistics, photographs, and maps. They describe the place of weather in popular history and folklore and how forces of nature compelled the construction of extensive flood control and weather warning systems in Ohio. Thunder in the Heartland will be of interest to climatologists, cultural historians, and all who live the weather of the Ohio Country.