EAS faculty members Travis O'Brien and Cody Kirkpatrick, along with GEOG faculty member Scott Robeson published a statement on the 30-year storms that occurred in Bloomington the evening of June 18 through June 19th, 2021.
Quoting from their summary: "Intense rainfall and flooding occurred in Bloomington, IN overnight on June 18 -19, 2021. The event was caused by a massive complex of thunderstorms that parked over the Bloomington, IN area for over 8 hours. Preliminary reports show that the system delivered 6.1 inches of rain at the IU Bloomington station, which puts the event as the 3rd on record and the largest in over 100 years. Regional trends over the last century show an increase in extreme rainfall like this event, which is consistent with fundamental Atmospheric Science theories and climate model simulations of ongoing and future climate change.
The flood was caused by a large amount of precipitation from a mesoscale convective system (MCS) associated with a quasi-stationary front. The MCS strengthened overnight on June 18 and remained stationary; precipitation from the storm continued through June 19. A weather station in Bloomington, IN recorded over 10,000 lightning strikes within a 30 mile radius overnight.
Local weather observers recorded 5-7 inches of rainfall within a 24 hour period."
6/24/21: From David Askins at The B Square "If a rainfall like last weekend’s was not a fluke, what does that mean for the city of Bloomington?"