Storm Data Summaries for Northern Illinois and Northwest Indiana

Storm Data for the Chicago Forecast Office County Warning Area

Storm Data contains a chronological listing of tornadoes, thunderstorms, hail, floods, drought conditions, lightning, high winds, snow, temperature extremes and other unusual weather phenomena. The reports are provided by the National Weather Service and contain statistics on personal injuries and damage estimates. Storm Data is a publication of the National Centers for Environmental Information (NCEI).

The publications listed below are available in Portable Document Format (PDF). The PDF Viewer is required to view and/or print these files. One can also search the Storm Data certified reports by using the NCEI Storm Events Database tool.

IMPORTANT: These reports are preliminary, unofficial, and uncertified. For official, certified reports, please contact the NCEI by calling (828) 271-4800 or by e-mail to ncei.orders@noaa.gov. The storm data listed here are monthly summaries of all preliminary storm reports in the NWS Chicago county warning area. If you require data that is beyond that period, please contact the NCEI.

Months that have an "X" below indicate that Storm Data is not available for that time period yet.

	2025	2024	2023	2022	2021	2020
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FEB
MAR
APR
MAY
JUN
JUL
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NOV
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	2019	2018	2017	2016	2015	2014	2013	2012	2011	2010
JAN
FEB
MAR
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MAY
JUN
JUL
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SEP
OCT
NOV
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	2009	2008	2007	2006	2005	2004	2003
JAN
FEB
MAR
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MAY
JUN
JUL
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OCT
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DEC

NOTE: There is an approximate three month delay for the Storm Data Summaries to be posted. For example, the July Storm Data Summary does not get published until around October 1st.

If you could not locate the information you were looking for, also try the NWS Chicago Science and Past Events Page.