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Flood in Ogle County, Illinois
48 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Ogle County, Illinois, has 48 flood events in the NCEI record since 1950, with at least one in 20 different years.
August is the busiest month, with 13 of the recorded events. The last 20 years account for 36 events against 12 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.7% of the 6,507 flood events recorded in Illinois; its 6.3 per 100 square miles compares with 11.7 statewide.
Compared with Illinois
| Measure | Ogle County | Illinois | US |
|---|---|---|---|
| Flood events since 1950 | 48 | 6,507 | 183,559 |
| Per 100 square miles | 6.3 | 11.7 | 5.2 |
| Per 10,000 residents | 9.3 | 5.1 | 5.5 |
| Deaths recorded | 0 | 61 | 2,961 |
| Busiest month | August | June | June |
By year
Seasonality
0Feb
2Mar
1Apr
3May
4Jun
11Jul
10Aug
13Sep
2Oct
1Nov
0Dec
1
Recorded events
All 48 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 25 Jul 2025 | Flash Flood | — | $1K | $15K | — | — | County |
| 4 Apr 2023 | Flood | — | — | — | — | — | County |
| 4 Apr 2023 | Flood | — | — | — | — | — | County |
| 19 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 19 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 8 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 8 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 8 Aug 2022 | Flash Flood | — | — | — | — | — | County |
| 3 Sep 2019 | Flood | — | — | — | — | — | County |
| 5 Jun 2019 | Flash Flood | — | — | — | — | — | County |
| 13 Mar 2019 | Flood | — | — | — | — | — | County |
| 7 Oct 2018 | Flood | — | — | — | — | — | County |
| 7 Aug 2018 | Flood | — | — | — | — | — | County |
| 15 Jun 2018 | Flash Flood | — | — | — | — | — | County |
| 15 Jun 2018 | Flood | — | — | — | — | — | County |
| 20 Feb 2018 | Flood | — | — | — | — | — | County |
| 21 Jul 2017 | Flood | — | — | — | — | — | County |
| 21 Jul 2017 | Flood | — | — | — | — | — | County |
| 5 Jul 2017 | Flood | — | — | — | — | — | County |
| 15 Jun 2015 | Flood | — | — | — | — | — | County |
| 17 Apr 2013 | Flash Flood | — | — | — | — | — | County |
| 29 May 2011 | Flood | — | — | — | — | — | County |
| 4 Aug 2010 | Flash Flood | — | — | — | — | — | County |
| 24 Jul 2010 | Flood | — | — | — | — | — | County |
| 24 Jul 2010 | Flash Flood | — | $268K | — | — | — | County |
| 25 May 2010 | Flash Flood | — | — | — | — | — | County |
| 22 Jun 2009 | Flash Flood | — | $250K | — | — | — | County |
| 19 Jun 2009 | Flash Flood | — | $100K | — | — | — | County |
| 27 Dec 2008 | Flash Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flash Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flash Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flood | — | — | — | — | — | County |
| 23 Aug 2007 | Flood | — | — | — | — | — | County |
| 18 Jul 2007 | Flash Flood | — | — | — | — | — | County |
| 18 Jul 2007 | Flood | — | — | — | — | — | County |
| 17 Jul 2007 | Flash Flood | — | — | — | — | — | County |
| 12 Jun 2004 | Flash Flood | — | — | — | — | — | County |
| 22 Aug 2002 | Flood | — | — | — | — | — | Forecast zone |
| 22 Aug 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flash Flood | — | — | — | — | — | County |
| 4 Jun 2002 | Flood | — | — | — | — | — | Forecast zone |
| 6 Sep 2001 | Flood | — | — | — | — | — | County |
| 12 Jun 2000 | Flash Flood | — | — | — | — | — | County |
| 12 Jun 2000 | Flood | — | — | — | — | — | Forecast zone |
| 12 May 1999 | Flash Flood | — | — | — | — | — | County |
| 20 Feb 1997 | Flood | — | — | — | — | — | Forecast zone |
| 17 Jul 1996 | Flash Flood | — | — | — | — | — | County |
| 28 May 1996 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Ogle County had?
48 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Ogle County?
25 Jul 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Ogle County?
The flash flood of 24 Jul 2010, with property damage estimated by NCEI at $268K.
How does Ogle County compare with Illinois for flood?
6.3 events per 100 square miles against 11.7 statewide; the county holds 48 of the state's 6,507 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.