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Wind in Delaware County, Iowa
232 damaging wind events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Thunderstorm Wind, High Wind, Strong Wind.
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.
NCEI records 232 wind events in Delaware County, Iowa, between 1950 and 2026, spread over 58 years.
June is the busiest month, with 63 of the recorded events. The last 20 years account for 135 events against 60 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.1% of the 20,854 wind events recorded in Iowa; its 40.2 per 100 square miles compares with 37.3 statewide.
161 wind reports with a measured or estimated speed reached the 58 mph severe threshold, and 40 reached hurricane force (74 mph).
Some winter weather and high wind events are recorded by NWS forecast zone rather than by county; zone-recorded events whose zone is named for the county are included and marked "Forecast zone" in the table.
Compared with Iowa
| Measure | Delaware County | Iowa | US |
|---|---|---|---|
| Wind events since 1950 | 232 | 20,854 | 701,953 |
| Per 100 square miles | 40.2 | 37.3 | 19.9 |
| Per 10,000 residents | 132.5 | 65.3 | 21.1 |
| Deaths recorded | 0 | 25 | 2,166 |
| Busiest month | June | June | June |
By year
Seasonality
0Feb
4Mar
4Apr
25May
27Jun
63Jul
53Aug
33Sep
14Oct
2Nov
5Dec
2
Magnitude distribution
NWS wind thresholds
- under 58 mph
- below severe threshold
- 58–73 mph
- severe
- 74–95 mph
- hurricane-force
- 96 mph and over
- extreme
Wind speed converted from the knots NCEI records; estimated and measured gusts are combined. Events without a speed are not binned.
Recorded events
The 187 events kept for this page are the 120 most recent plus the 80 with the most damage, deaths or injuries out of 232. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 10 Jun 2026 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 10 Jun 2026 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 17 May 2026 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 17 Apr 2026 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 14 Apr 2026 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 14 Apr 2026 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 14 Apr 2026 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 14 Apr 2026 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 29 Jul 2025 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 29 Jul 2025 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 29 Jul 2025 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 11 Jul 2025 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 11 Jun 2025 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 11 Jun 2025 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 11 Jun 2025 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 14 Mar 2025 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 15 Jul 2024 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 15 Jul 2024 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 21 May 2024 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 16 Apr 2024 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 28 Jul 2023 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 28 Jul 2023 | Thunderstorm Wind | 61 mph | — | — | — | — | County |
| 28 Jul 2023 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 3 Aug 2022 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 3 Aug 2022 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 3 Aug 2022 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 23 Jul 2022 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 23 Jul 2022 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 23 Jul 2022 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 23 Jul 2022 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 5 Jul 2022 | Thunderstorm Wind | 63 mph | — | — | — | — | County |
| 15 Dec 2021 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 15 Dec 2021 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 24 Aug 2021 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 24 Aug 2021 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 24 Aug 2021 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 24 Aug 2021 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 10 Aug 2021 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 20 Jun 2021 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 6 Sep 2020 | Thunderstorm Wind | 63 mph | — | — | — | — | County |
| 28 Aug 2020 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 28 Aug 2020 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 28 Aug 2020 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 9 Jul 2020 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 9 Jul 2020 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 5 Jun 2020 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 12 Sep 2019 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 9 Sep 2019 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 30 Jun 2019 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 30 Jun 2019 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 30 Jun 2019 | Thunderstorm Wind | 90 mph | — | — | — | — | County |
| 30 Jun 2019 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 9 Jun 2018 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 19 Jul 2017 | Thunderstorm Wind | 62 mph | — | — | — | — | County |
| 19 Jul 2017 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 28 Jun 2017 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 28 Jun 2017 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 17 May 2017 | Thunderstorm Wind | 69 mph | $10K | — | — | — | County |
| 17 May 2017 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 17 May 2017 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 17 May 2017 | Thunderstorm Wind | 89 mph | — | — | — | — | County |
| 17 May 2017 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 6 Mar 2017 | Thunderstorm Wind | 59 mph | — | — | — | — | County |
| 6 Mar 2017 | Thunderstorm Wind | 69 mph | — | — | — | — | County |
| 6 Mar 2017 | Thunderstorm Wind | 72 mph | — | — | — | — | County |
| 4 Aug 2016 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 4 Aug 2016 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 23 Jul 2016 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 23 Jul 2016 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 23 Jul 2016 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 17 Jul 2016 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 6 Jul 2016 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 14 Jun 2016 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 26 May 2016 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 26 May 2016 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 19 Feb 2016 | High Wind | 60 mph | — | — | — | — | Forecast zone |
| 19 Feb 2016 | High Wind | 58 mph | — | — | — | — | Forecast zone |
| 11 Nov 2015 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 11 Nov 2015 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 11 Nov 2015 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 22 Jun 2015 | Thunderstorm Wind | 90 mph | — | — | — | — | County |
| 22 Jun 2015 | Thunderstorm Wind | 81 mph | — | — | — | — | County |
| 30 Jun 2014 | Thunderstorm Wind | 69 mph | — | — | — | — | County |
| 19 Jun 2014 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 19 Jun 2014 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 16 Jun 2014 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 16 Jun 2014 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 16 Jun 2014 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 16 Jun 2014 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 19 Sep 2013 | Thunderstorm Wind | 64 mph | $25K | — | — | — | County |
| 30 Aug 2013 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 21 Jun 2013 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 29 May 2013 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 19 May 2013 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 19 May 2013 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 19 May 2013 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 19 May 2013 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 4 Aug 2012 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 25 Jul 2012 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 25 Jul 2012 | Thunderstorm Wind | 69 mph | — | — | — | — | County |
| 25 Jul 2012 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 11 Jul 2011 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 13 Aug 2010 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 17 Jun 2010 | Thunderstorm Wind | 64 mph | $1K | — | — | — | County |
| 6 Apr 2010 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 5 Apr 2010 | Thunderstorm Wind | 64 mph | $25K | — | — | — | County |
| 5 Apr 2010 | Thunderstorm Wind | 64 mph | $10K | — | — | — | County |
| 9 Aug 2009 | Thunderstorm Wind | 60 mph | — | — | — | — | County |
| 9 Aug 2009 | Thunderstorm Wind | 70 mph | — | — | — | — | County |
| 9 Aug 2009 | Thunderstorm Wind | 64 mph | — | — | — | — | County |
| 24 Jul 2009 | Thunderstorm Wind | 75 mph | $50K | — | — | — | County |
| 24 Jul 2009 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 24 Jul 2009 | Thunderstorm Wind | 75 mph | — | — | — | — | County |
| 24 Jul 2009 | Thunderstorm Wind | 70 mph | $50K | — | — | — | County |
| 19 Jun 2009 | Thunderstorm Wind | 75 mph | $250K | — | — | — | County |
| 19 Jun 2009 | Thunderstorm Wind | 75 mph | $100K | — | — | — | County |
| 19 Jun 2009 | Thunderstorm Wind | 75 mph | $25K | — | — | — | County |
| 19 Jun 2009 | Thunderstorm Wind | 70 mph | $50K | — | — | — | County |
| 19 Jun 2009 | Thunderstorm Wind | 75 mph | $100K | — | — | — | County |
| 19 Jun 2009 | Thunderstorm Wind | 70 mph | $100K | — | — | — | County |
| 8 Jun 2008 | Thunderstorm Wind | 70 mph | $5K | — | — | — | County |
| 25 May 2008 | Thunderstorm Wind | 70 mph | $50 | — | — | — | County |
| 14 Aug 2007 | Thunderstorm Wind | 70 mph | $5K | — | — | — | County |
| 17 Jul 2007 | Thunderstorm Wind | 60 mph | $5K | — | — | — | County |
| 19 Jul 2006 | Thunderstorm Wind | 66 mph | — | $10K | — | — | County |
| 19 Jul 2006 | Thunderstorm Wind | 60 mph | $2K | — | — | — | County |
| 21 Jul 2005 | Thunderstorm Wind | 62 mph | — | $2K | — | — | County |
| 29 Jun 2005 | Thunderstorm Wind | 70 mph | $25K | — | — | — | County |
| 29 Jun 2005 | Thunderstorm Wind | 70 mph | $12K | — | — | — | County |
| 29 Jun 2005 | Thunderstorm Wind | 60 mph | $10K | — | — | — | County |
| 29 Jun 2005 | Thunderstorm Wind | 70 mph | $7K | — | — | — | County |
| 26 Aug 2004 | Thunderstorm Wind | 60 mph | $2K | $2K | — | — | County |
| 30 May 2004 | Thunderstorm Wind | 70 mph | $15K | $4K | — | — | County |
| 22 May 2004 | Thunderstorm Wind | 61 mph | $5K | — | — | — | County |
| 22 May 2004 | Thunderstorm Wind | 60 mph | $5K | — | — | — | County |
| 17 May 2004 | Thunderstorm Wind | 60 mph | $10K | $5K | — | — | County |
| 5 Jul 2003 | Thunderstorm Wind | 70 mph | $100K | $10K | — | — | County |
| 10 May 2003 | Thunderstorm Wind | 92 mph | $2.0M | — | — | — | County |
| 24 Aug 1998 | Thunderstorm Wind | — | $35K | — | — | — | County |
| 18 Jun 1998 | Thunderstorm Wind | — | $3K | — | — | — | County |
| 18 Jun 1998 | Thunderstorm Wind | — | $2K | — | — | — | County |
| 6 Apr 1997 | High Wind | 58 mph | $100K | — | — | — | Forecast zone |
| 5 Apr 1997 | Thunderstorm Wind | 81 mph | $10K | — | — | — | County |
| 27 Jul 1995 | Thunderstorm Wind | 60 mph | $10K | — | — | — | County |
| 4 Jul 1995 | Thunderstorm Wind | 70 mph | $75K | $5K | — | — | County |
| 4 Jul 1995 | Thunderstorm Wind | 70 mph | $10K | $3K | — | — | County |
| 14 Apr 1994 | Thunderstorm Wind | 75 mph | $500K | — | — | — | County |
| 14 Apr 1994 | Thunderstorm Wind | 58 mph | $50K | — | — | — | County |
| 14 Apr 1994 | Thunderstorm Wind | 58 mph | $50K | — | — | — | County |
| 8 Jul 1987 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 26 Sep 1986 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 24 Jul 1985 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 26 Jun 1984 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 17 Jun 1984 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 29 Apr 1984 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 29 Apr 1984 | Thunderstorm Wind | 79 mph | — | — | — | — | County |
| 27 Apr 1984 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 19 Jul 1983 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 26 Jun 1983 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 3 Apr 1981 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 20 Aug 1980 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 2 Jun 1980 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 28 Aug 1979 | Thunderstorm Wind | 58 mph | — | — | — | — | County |
| 27 Jul 1979 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 24 Aug 1975 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 23 May 1975 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 20 Jun 1974 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 20 Jun 1974 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 9 Jun 1974 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 9 Jun 1974 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 21 Sep 1973 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 18 Jul 1971 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 12 Jul 1971 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 8 Jul 1971 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 19 Jun 1971 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 7 Jun 1971 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 18 Jun 1970 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 29 Jun 1969 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 8 Aug 1968 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 17 Aug 1967 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 30 Apr 1967 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 9 Jul 1966 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 3 Jul 1964 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 7 May 1964 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 28 May 1962 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 17 Jul 1956 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
| 3 May 1955 | Thunderstorm Wind | 0 mph | — | — | — | — | County |
Questions and answers
How many wind events has Delaware County had?
232 events in the NCEI Storm Events record between 1950 and 2026. Reporting of damaging wind became far more complete after 1996, so early decades undercount.
When was the last recorded wind event in Delaware County?
10 Jun 2026 (Thunderstorm Wind, 58 mph). Records reach NCEI about 120 days after the month ends.
What was the most damaging wind event recorded in Delaware County?
The thunderstorm wind of 10 May 2003, with property damage estimated by NCEI at $2.0M.
How does Delaware County compare with Iowa for wind?
40.2 events per 100 square miles against 37.3 statewide; the county holds 232 of the state's 20,854 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 Wind hub and the county page.