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Flood in Henry County, Iowa
27 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.
Henry County, Iowa, has 27 flood events in the NCEI record since 1950, with at least one in 13 different years.
June is the busiest month, with 12 of the recorded events. The last 20 years account for 18 events against 9 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.4% of the 7,383 flood events recorded in Iowa; its 6.2 per 100 square miles compares with 13.2 statewide.
NCEI attributes 1 death in the county to floods and flash floods.
Compared with Iowa
| Measure | Henry County | Iowa | US |
|---|---|---|---|
| Flood events since 1950 | 27 | 7,383 | 183,559 |
| Per 100 square miles | 6.2 | 13.2 | 5.2 |
| Per 10,000 residents | 13.2 | 23.1 | 5.5 |
| Deaths recorded | 1 | 18 | 2,961 |
| Busiest month | June | June | June |
By year
Seasonality
0Feb
2Mar
0Apr
0May
4Jun
12Jul
4Aug
3Sep
1Oct
1Nov
0Dec
0
Recorded events
All 27 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 |
|---|---|---|---|---|---|---|---|
| 1 Jun 2019 | Flood | — | — | — | — | — | County |
| 20 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 20 Jul 2017 | Flash Flood | — | — | — | — | — | County |
| 11 Jul 2015 | Flash Flood | — | — | — | — | — | County |
| 13 Aug 2010 | Flood | — | $500K | — | — | — | County |
| 13 Aug 2010 | Flash Flood | — | — | — | — | — | County |
| 23 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 22 Jun 2010 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2010 | Flash Flood | — | $10K | — | — | — | County |
| 13 Sep 2008 | Flash Flood | — | $250K | — | — | — | County |
| 12 Jun 2008 | Flash Flood | — | — | — | — | — | County |
| 1 Jun 2008 | Flood | — | $535K | — | — | — | County |
| 24 Aug 2007 | Flood | — | — | — | — | — | County |
| 9 Jul 2007 | Flash Flood | — | $15K | — | — | — | County |
| 22 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 22 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 22 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 2 Jun 2007 | Flash Flood | — | — | — | — | — | County |
| 1 Jun 2004 | Flood | — | — | — | — | — | Forecast zone |
| 12 May 2002 | Flash Flood | — | — | — | — | — | County |
| 14 May 2001 | Flood | — | — | — | — | — | County |
| 3 May 2001 | Flood | — | — | — | — | — | County |
| 24 Feb 2001 | Flood | — | — | — | — | — | County |
| 23 Jun 2000 | Flood | — | — | — | 1 | — | County |
| 17 Oct 1998 | Flash Flood | — | — | — | — | — | County |
| 20 Feb 1997 | Flash Flood | — | — | — | — | — | County |
| 9 May 1996 | Flood | — | — | — | — | — | Forecast zone |
Questions and answers
How many flood events has Henry County had?
27 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 Henry County?
1 Jun 2019 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Henry County?
The flood of 1 Jun 2008, with property damage estimated by NCEI at $535K.
How does Henry County compare with Iowa for flood?
6.2 events per 100 square miles against 13.2 statewide; the county holds 27 of the state's 7,383 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.