Iowa Derecho This August Was Most Costly Thunderstorm Event In Modern U.S. History
The derecho, which raced through the Midwest and focused its attention on Iowa, led to $7.5 billion in damage. That's more expensive than some hurricanes.
The powerful derecho that swept through the Midwest in August, focusing its destruction on central Iowa, is officially the most costly thunderstorm event in recorded U.S. history.
According to released by the National Oceanic and Atmospheric Administration, the sustained line of thunderstorms that traveled 770 miles from South Dakota through Ohio in 14 hours, has cost $7.5
