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Heavy rain and flooding highlighted a wild month of June across central portions of the Midwest. Illinois was the wettest state, breaking a record that has stood for over 100 years. Illinois’ rainfall of 9.30 inches broke the record of 8.27 inches set back in 1902. This was more than twice the normal rainfall of 4.21 inches for the month. Indiana and Ohio also set June records with 8.90 inches and 8.13 inches, respectively. These states also saw more than twice their normal June rainfall and broke records that were set decades ago.

Chicago’s official station, O’Hare Airport, also reported more than double its normal precipitation with 7.12 inches. This was the 7th wettest Junethe record is 9.96 inches set in 1993. Even though Chicago did not break its June precipitation record, it did break another2015 now claims the cloudiest June on record with only 46 percent sunshine. The previous record low sunshine was 48 percent set back in 1942.

All of this rain has had its effect. Many crop fields are soaked, the rain stunting plant growth and preventing field chores. Lake levels continue to rise at record ratesmore than 3 feet since January 2013. And NOAA is forecasting severe algal blooms in Lake Erie this summer.

Wetter-than-normal June’s have become a thing of recent years. In Illinois, four of the top 10 rainiest June’s on record have occurred since 2010 and for the Midwest as a whole, five of the top 10 rainiest June’s have occurred since 2000. The story isn’t much different in Chicago – five of the top 10 rainiest June’s at Chicago O’Hare have occurred since 2009.

With record-breaking June rain across portions of the Midwest and some of the wettest June months occurring in recent years, you may wonder if this is an indication what’s in store for the future. But, even though June has been wetter than normal in the past 10-15 years, the overall trend of climate data for the Midwest, Illinois, and Chicago do not show a statistically significant upward trend in June precipitation. In fact, three of the top 10 driest June’s on record in Chicago have occurred since 2003 and two in Illinois since 2005. It’s possible that the region is in a predominately wet pattern, which can last for a few decades or more, but it may not stick around for much longer than that. This is what happened in early part of the 20th century when drier-than-normal years were more common than wetter years.

Climate model projections show only slight increases in future total annual precipitation for the Midwest, particularly in the winter and spring (summer and fall precipitation are not expected to change much). However, larger increases are projected in the frequency and intensity of extreme precipitation across the entire regionmeaning more precipitation may fall with each event (and longer dry spells in between) but the overall yearly total may not change much.
Molly Woloszen, IISG and the Midwestern Regional Climate Center

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This February marks a major milestone: 30 years of aquatic invasive species outreach by our team! To celebrate, IISG Director, Stuart Carlton, and Strategic Communication Coordinator, Renie Miles, sat down for a Sea Grant Chat with two key figures in IISG’s AIS history: Pat Charlebois, our assistant director and program leader, who spent over two decades leading our prevention efforts, and Katie O’Reilly, who took over that role in 2022. We discussed the evolution of the invasive species issue in the Great Lakes, the shift toward understanding human behavior, and the creative strategies that make this team so effective. Dive into the full interview at the link in bio.
Introducing the Lake Michigan Explorer! Start exploring the varied factors that impact the Great Lakes with our Explorer Series. This searchable database of external resources can help you find hands-on activities that spark curiosity and inspire action. ✨ What’s inside?Lesson plans, fact sheets, and reading materialsEngaging videos and visualizationsEasy-to-use filters by grade level, topic, and time.Perfect for classrooms and informal learning, this resource empowers students to become stewards of the Great Lakes.🔗 in bio for more.
Join is in welcoming our new research and reporting coordinator, Laura Esman, to the team! In her new role, Laura will oversee research competitions and manage IISG’s research portfolio. She will also spearhead IISG data collection and lead the program’s annual reporting process.Esman brings over 30 years of experience in research, project coordination and grant administration. Her most recent positions include managing director of the Indiana Water Resources Research Center, and lab manager and research associate in the Natural Resources Social Science Lab in Purdue’s Department of Forestry and Natural Resources.Full story at the link in bio.