National Weather Service United States Department of Commerce
Radar loop of the tornado event. The top left image is base reflectivity (Z) and the top right image is storm-relative velocity (SRV). The bottom two images are correlation coefficient (CC) and spectrum width (SW). Low values of CC, combined with a SRV couplet or on a convergence zone, are a strong indicator of debris being lofted by a tornado. High values of SW can also denote the presence of a circulation.
Total Iowa Tornadoes: 43
EF0 (32)
EF1 (9)
EF2 (2)
EF3 (0)
EF4 (0)
EF5 (0)
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***ALL DATA ON THIS PAGE IS PRELIMINARY AND MAY CHANGE AT ANY TIME***
This page will be updated as time and resources allow and may not contain information from recent events
Information last updated on 3/20/2017

Above is a map of the tornadoes that occurred across Iowa in 2016. Mouse over each icon to view more information on that tornado, which will appear in the box to the right. A season summary and table of these tornadoes is provided below. Detailed KMZ files for many of the tracks can be downloaded and viewed in Google Earth by clicking on the appropriate icon in the table below. To download the full year map shown above, click the download button below.

Please note: Track lines and contours are often interpolated and may not encompass the full extent of the damage. Surveying procedures vary between NWS offices. Downloadable tracks may not be available for weak tornadoes that were not surveyed.


2016 Iowa Tornado Summary  

     A total of 33 tornadoes have occurred so far in Iowa through August 7. All but nine tornadoes have been rated EF-0, with seven of these nine being rated EF-1 and the last two tornadoes coming in at an EF-2. The season started on March 15 with three tornadoes in far eastern Iowa (part of a larger outbreak that impacted Iowa and Illinois), but remained quiet until April 27 when five weak tornadoes tracked across southwest Iowa. Another round of weak tornadoes were spread across central and eastern Iowa on May 9. The remainder of May and June featured a smattering of short-lived and/or weak tornadoes, including two highly visible tornadoes in far western Iowa on June 29. A strong squall line produced five tornadoes across eastern Iowa on July 17 (tied with April 27 for the most tornadoes in a single day for 2016). Two of these tornadoes were rated EF-2 and damaged multiple structures and caused nine injuries. Another squall line on July 23 produced three tornadoes over eastern Iowa, including one over Lake Delhi that produced tree damage along the lake. Four landspout tornadoes rounded out the month of July in northern Iowa. August 4 would witness a highly visible landspout/waterspout over Lake Manawa on the south side of Council Bluffs.


2016 Iowa Tornado Listing
Click each date for storm survey or event summaries (for select events)
# Date Time - Local
(CDT/CST)
Counties Start Location EF Rating Path
Length
Injuries/
Deaths
Radar
Loop
View Map KMZ File Survey
Office
1. 03/15/2016 7:33pm - 7:35pm Scott
Clinton
1.0 mi NE of McCausland EF0 1.20 mi 0/0 DVN
2. 03/15/2016 7:49pm - 7:51pm Clinton 1.9 mi E of Low Moor EF1 1.40 mi 3/0 DVN
3. 03/15/2016 7:57pm - 8:01pm Clinton 4.9 mi SW of Andover EF1 3.40 mi 0/0 DVN
4. 04/27/2016 3:14pm - 3:19pm Montgomery 2.9 mi ESE of Stanton EF1 1.74 mi 0/0 OAX
5. 04/27/2016 4:40pm - 4:47pm Taylor 6.0 mi ESE of Bedford EF0 2.37 mi 0/0 DMX
6. 04/27/2016 4:44pm - 4:46pm Taylor 6.0 mi E of Bedford EF0 0.91 mi 0/0 DMX
7. 04/27/2016 5:12pm - 5:13pm Taylor 2.1 mi NW of Clearfield EF0 0.63 mi 0/0 DMX
8. 04/27/2016 5:40pm - 5:47pm Union 4.5 mi S of Creston EF0 4.01 mi 0/0 DMX
9. 05/09/2016 3:06pm - 3:07pm Davis 4.5 mi W of Bloomfield EF0 0.33 mi 0/0 DMX
10. 05/09/2016 5:15pm - 5:16pm Louisa 5.1 mi ESE of Crawfordsville EF0 0.09 mi 0/0 DVN
11. 05/09/2016 7:46pm - 8:01pm Guthrie 7.5 mi SW of Guthrie Center EF0 5.55 mi 0/0 DMX
12. 05/09/2016 8:18pm - 8:23pm Guthrie 7.4 mi S of Coon Rapids EF0 1.50 mi 0/0 DMX
13. 05/23/2016 4:41pm - 4:42pm Sioux 3.7 mi NE of Granville EF0 0.05 mi 0/0 N/A N/A FSD
14. 05/28/2016 5:52pm - 5:53pm Plymouth 2.1 mi NNW of Kingsley EF0 0.09 mi 0/0 N/A N/A FSD
15. 05/31/2016 10:04am Clinton 2.9 mi ENE of Elvira EF0 0.03 mi 0/0 N/A N/A DVN
16. 06/14/2016 2:22pm - 2:23pm Dickinson 7.6 mi W of West Okoboji EF0 0.05 mi 0/0 N/A N/A FSD
17. 06/14/2016 5:16pm Benton 3.8 mi NW of Urbana EF0 0.26 mi 0/0   DVN
18. 06/29/2016 5:51pm - 5:59pm Harrison 4.1 mi NE of Beebeetown EF0 3.28 mi 0/0 N/A N/A OAX
19. 06/29/2016 6:06pm - 6:15pm Pottawattamie 4.2 mi NW of Neola EF0 4.40 mi 0/0 OAX
20. 07/17/2016 5:01am - 5:03am Benton 0.8 mi SW of Vinton EF2 1.62 mi 5/0 DVN
21. 07/17/2016 5:15am - 5:21am Benton
Linn
1.5 mi SE of Norway EF2 4.00 mi 4/0 DVN
22. 07/17/2016 6:03am - 6:05am Jackson 0.7 mi SW of Andrew EF1 1.00 mi 0/0 DVN
23. 07/17/2016 6:25am - 6:26am Scott 2.2 mi NE of Eldridge EF0 1.04 mi 0/0 DVN
24. 07/17/2016 6:36am - 6:38am Scott 3.4 mi SW of Princeton EF1 2.01 mi 0/0 DVN
25. 07/19/2016 2:34pm - 2:39pm Monroe 0.3 mi N of Melrose EF0 2.42 mi 0/0 DMX
26. 07/23/2016 4:05pm - 4:06pm Buchanan
Delaware
2.9 mi S of Masonville EF1 0.16 mi 0/0 DVN
27. 07/23/2016 4:18pm - 4:19pm Delaware 3.4 mi SW of Delhi EF1 0.25 mi 0/0 DVN
28. 07/23/2016 4:42pm - 4:45pm Dubuque 1.9 mi N of Worthington EF0 0.78 mi 0/0 DVN
29. 07/27/2016 5:15pm - 5:16pm Kossuth 6.1 mi NW of Algona EF0 0.36 mi 0/0 DMX
30. 07/27/2016 6:11pm - 6:12pm Winnebago 4.9 mi W of Scarville EF0 0.35 mi 0/0 DMX
31. 07/27/2016 6:39pm - 6:41pm Humboldt 3.2 mi WNW of Bode EF0 0.68 mi 0/0   DMX
32. 07/30/2016 10:29am - 10:31am Kossuth 5.4 mi SE of Algona EF0 0.49 mi 0/0   DMX

33.

08/04/2016 5:21pm - 5:36 pm Pottawattamie 3.5 mi S of Council Bluffs EF0 0.58 mi 0/0 N/A N/A N/A OAX
34. 08/28/2016 4:33pm - 4:33pm Linn 2.8 mi W of Coggon   EF0F 0.10 mi 0/0 N/A N/A N/A DVN
35. 09/06/2016 5:50pm - 5:51pm Howard 3.4 mi SE of Lime Springs EF0 0.02 mi 0/0 N/A N/A N/A ARX
36. 09/21/2016 6:32pm - 6:35pm Floyd 7.6 mi ESE of Marble Rock EF0 1.65 mi 0/0 N/A N/A N/A ARX
37. 10/06/2016 10:07pm - 10:18pm Muscatine 4.1 mi NW of Muscatine EF1 9.52 mi 0/0 N/A N/A N/A DVN
38. 10/06/2016 10:36pm - 11:00pm

Scott (IA)
Rock Island (IL)

0.4 mi NNE of Credit Island EF1 20.02 mi 0/0 N/A N/A N/A DVN
39. 11/28/2016 12:44pm - 12:55pm Hardin Radcliff EF0 5.22 mi 0/0 N/A N/A N/A DMX
40. 11/28/2016 3:38pm - 3:50pm

Grundy
Butler

3.5 mi NNW Fern EF0 5.68 mi 0/0 N/A N/A N/A DMX
41. 11/28/2016 3:41pm - 3:44pm Grundy 3.4 mi WSW of Grundy Center EF0 1.47 mi 0/0 N/A N/A N/A DMX
42. 11/28/2016 4:11pm - 4:21pm Mahaska Poweshiek 2.9 mi NE New Sharon EF0 4.54 mi 0/0 N/A N/A N/A DMX
43. 11/28/2016 4:30pm - 4:33pm Poweshiek 1.3 mi SE Montezuma EF0 1.17 mi 0/0 N/A N/A N/A DMX


* Red entries indicate that the information is still under review

Track lengths use polylines created in the NWS Damage Assessment Toolkit when available, which may be longer than the official Storm Data track (derived from start and end points only).