Flood Return Period Calculator

Strong to Severe Storms in the Ohio Valley and Mid-Atlantic; Snow in the Upper Great Lakes

Strong to severe thunderstorms will continue tonight across portions of the Ohio Valley into the Mid-Atlantic. Heavy rains may bring an isolated flash flooding threat over the central Appalachians, particularly in West Virginia. Moderate to heavy snow will continue over portions of northern Minnesota and the Upper Peninsula of Michigan through Tuesday morning. Read More >

Flood Return Period Calculator

Though this calculator is worded for the flood event return period it would work for any extreme weather event.