Iowa, 2011
The year's recorded storm events, federal disaster declarations and flood insurance claims.
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.
Events by hazard
Includes events recorded by forecast zone. The state's yearly total for 2011 was 2,072 against 2,940 in 2010.
Counties with the most recorded events
Notable events
| Date | County | Event type | Magnitude | Property damage | Deaths | Injuries |
|---|---|---|---|---|---|---|
| 29 May 2011 | Johnson | Thunderstorm Wind | 75 mph | $10,000 | 1 | — |
| 9 Nov 2011 | Clayton | Winter Weather | — | $5,000 | 1 | — |
| 2 Dec 2011 | Floyd | Winter Weather | — | $5,000 | 1 | — |
| 9 Nov 2011 | Delaware | Winter Weather | — | — | 1 | — |
| 1 Feb 2011 | Henry | Blizzard | — | — | 1 | — |
| 9 Apr 2011 | Monona | Tornado | EF3 | — | — | 14 |
| 23 Aug 2011 | Fayette | Thunderstorm Wind | 58 mph | $2,500 | — | 6 |
| 28 Jan 2011 | Winneshiek | Winter Weather | — | $4,000 | — | 6 |
| 16 Feb 2011 | Clayton | Dense Fog | — | $12,000 | — | 5 |
| 18 Aug 2011 | Mills | Hail | 3.00 in | — | — | 5 |
| 17 Jul 2011 | Allamakee | Excessive Heat | — | $22,000 | — | 4 |
| 22 May 2011 | Howard | Tornado | EF2 | $525,000 | — | 3 |
| 20 Jun 2011 | Woodbury | Thunderstorm Wind | 81 mph | $150,000 | — | 2 |
| 20 Feb 2011 | Winneshiek | Winter Storm | — | $7,000 | — | 2 |
| 22 Mar 2011 | Harrison | Tornado | EF1 | — | — | 2 |
| 29 Sep 2011 | Clay | Wildfire | — | $15,000 | — | 1 |
| 9 Apr 2011 | Pocahontas | Tornado | EF3 | $10,000,000 | — | — |
| 11 May 2011 | Taylor | Tornado | EF1 | $10,000,000 | — | — |
| 1 Aug 2011 | Fremont | Flood | — | $10,000,000 | — | — |
| 27 Jul 2011 | Dubuque | Flash Flood | — | $7,000,000 | — | — |
| 1 Aug 2011 | Harrison | Flood | — | $7,000,000 | — | — |
| 11 May 2011 | Taylor | Tornado | EF1 | $5,000,000 | — | — |
| 1 Aug 2011 | Monona | Flood | — | $5,000,000 | — | — |
| 1 Aug 2011 | Pottawattamie | Flood | — | $5,000,000 | — | — |
| 1 Aug 2011 | Mills | Flood | — | $5,000,000 | — | — |
| 1 Sep 2011 | Fremont | Flood | — | $3,000,000 | — | — |
| 1 Jul 2011 | Pottawattamie | Flood | — | $3,000,000 | — | — |
| 9 Apr 2011 | Pocahontas | Tornado | EF4 | $2,500,000 | — | — |
| 9 Apr 2011 | Sac | Tornado | EF3 | $2,000,000 | — | — |
| 9 Apr 2011 | Sac | Tornado | EF2 | $2,000,000 | — | — |
| 27 Jul 2011 | Jackson | Flash Flood | — | $1,500,000 | — | — |
| 9 Apr 2011 | Buena Vista | Tornado | EF2 | $1,000,000 | — | — |
| 22 Mar 2011 | Madison | Tornado | EF2 | $1,000,000 | — | — |
| 3 Apr 2011 | Dubuque | Hail | 1.75 in | $1,000,000 | — | — |
| 3 Apr 2011 | Iowa | Hail | 1.75 in | $1,000,000 | — | — |
| 27 Jul 2011 | Dubuque | Flash Flood | — | $1,000,000 | — | — |
| 22 Jul 2011 | Jones | Thunderstorm Wind | 60 mph | $1,000,000 | — | — |
| 9 Apr 2011 | Sac | Tornado | EF2 | $1,000,000 | — | — |
| 11 Jul 2011 | Tama | Thunderstorm Wind | 110 mph | $750,000 | — | — |
| 11 Jul 2011 | Benton | Thunderstorm Wind | 120 mph | $1,000,000 | — | — |
Up to 40 events with deaths, injuries, damage of $50,000 or more, or a tornado rating, ranked by deaths, injuries and damage.
Federal disaster declarations in 2011
| Declared | Number | Type | Incident | Title | Counties |
|---|---|---|---|---|---|
| 30 Aug 2011 | DR-4018 | Major disaster | Severe Storm | Severe Storms And Flooding | 2 |
| 24 Aug 2011 | DR-4016 | Major disaster | Severe Storm | Severe Storms, Straight-Line Winds, And Flooding | 6 |
| 27 Jun 2011 | DR-1998 | Major disaster | Flood | Flooding | 6 |
| 5 May 2011 | DR-1977 | Major disaster | Severe Storm | Severe Storms, Tornadoes, And Straight-Line Winds | 6 |
Flood insurance claims with a 2011 date of loss
504 NFIP claims, 343 of them paid, for $12,598,907.
Sources: NOAA NCEI Storm Events through 30 Jun 2026; OpenFEMA DisasterDeclarationsSummaries v2 (1 Oct 2026); OpenFEMA NfipClaims v3 (8 Sep 2026). Built 1 Oct 2026.