Climate scientist on last weekend’s Bloomington rain: “It’s not like this was an absolute fluke…”

As of Wednesday, the National Weather Service is predicting 4 to 6 inches more rain for Bloomington, from Friday afternoon through Tuesday evening.

That follows 5 to 7 inches of rain that fell over a shorter period last weekend, which flooded a downtown Bloomington street, overtopped a county bridge with debris, and caused the floodwaters to sweep up one car, leaving its driver dead.

Based on the daily rainfall data in the National Oceanic and Atmospheric Administration’s Regional Climate Center database, last weekend’s two-day total rainfall of 6.1 inches, recorded by the Indiana University campus rain gauge, ranks it the third-worst storm, since daily rainfall totals have been kept, which starts in 1895.

The 6.1 inches measured on IU’s campus was the highest two-day total in the last century.

Does last weekend’s single event prove the case for climate change?

When The B Square spoke on Wednesday with Gabriel Filippelli, professor of earth sciences at IUPUI, he said, “Each given intense rainfall event does not mean that climate change has descended on us.”

Filippelli continued, “However, when you look at the regional records and you see the number of days Indiana has had extreme rainfall events, it has gone up substantially from about the end of the 1980s on.”

The amount of extreme rainfall in central Indiana has gone up by about 15 percent since 1990, Filippelli said. He continued, “The projections are, it’s going to go up another 15 percent by 2050.”

That means extreme rainfall will continue to be likely in this area, he said. He added, “Whether climate change will make them worse or not, it’s hard to say, ”

In the context of a 15-percent increase in extreme rainfall, Filippelli assessed last weekend’s storm like this: “You know, 15 percent isn’t a lot, but it’s not like this was an absolute fluke that we’ll never see again.” Continue reading “Climate scientist on last weekend’s Bloomington rain: “It’s not like this was an absolute fluke…””