Information sourced from: http://www.floodsmart.gov/floodsmart/pages/flooding_flood_risks/spring_thaw.jsp.
A midwinter or early spring thaw can produce large amounts of runoff in a short period of time. Because the ground is hard and frozen, water cannot penetrate and be reabsorbed. The water then runs off the surface and flows into lakes, streams and rivers, causing excess water to spill over their banks.
During the spring, frozen land prevents melting snow or rainfall from seeping into the ground. Each cubic foot of compacted snow contains gallons of water and once the snow melts, it can result in the overflow of streams, rivers and lakes. Add spring storms to that and the result is often serious, spring flooding.
Be prepared! Purchase flood insurance for your home (and business) and its contents, take an inventory of your belongings and make an emergency plan for you and your family. For more information, click here.