Area above Greeley, Colo. on Sept. 16, 2013 showing flooding

U.S.34 outside Greeley is ripped apart by the South Platte River on Monday, September 16, 2013. (Photo By Tim Rasmussen/The Denver Post)

In September 2013, severe storms struck Colorado with prolonged, heavy rainfall, resulting in at least nine deaths, 1,800 evacuations, and 900 homes destroyed or damaged. The eight-day storm dumped more than 17 inches of rain, causing the Platte River to reach flood levels higher than ever recorded.

The severity of the storms, which also occurred unusually late in the year, attracted the interest of scientists at Lawrence Berkeley National Laboratory (Berkeley Lab), including Bill Collins and Christina Patricola, two scientists from the Lab’s Earth & Environmental Sciences Area.  In many instances, the team’s research has shown that such events are made more intense in a warmer climate.

In a paper that appeared online on July 18, 2017 at Weather and Climate Extremes, the team reports that climate change attributed to human activity made the storm much more severe than would otherwise have occurred.

Read the full story at Berkeley Lab’s Computing Sciences Area website here.

This story was covered in the media here:

Global warming intensified Colorado’s deadly 2013 floods

Supercomputers turn the clock back on Storms with “Hindcasting”