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: 50

EF0 (18)
EF1 (21)
EF2 (11)
EF3 (0)
EF4 (0)
EF5 (0)
Previous Yearly Reviews
2016 2015 2014 2013
2012 2011 2010 2009
 
 

 

Mouse Over a Tornado Icon
or Path to Find out More!

 

Use your mouse scroll wheel or the / buttons to zoom in and out of the map.
 
***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 03/20/2017

Above is a map of the tornadoes that occurred across Iowa in 2017. 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.


2017 Iowa Tornado Summary  

    A total of 50 tornadoes have occurred so far in 2017.  The first February tornado in many years occurred on February 28th in far eastern Iowa near the small village of Folletts north of the Quad Cities.  This was a very brief tornado in a farm field observed by local emergency management.  A much more substantial event occurred on March 6th with 18 tornadoes occurring in Iowa on that day.  This is the largest number of tornadoes in March on a given day in the historical record dating back to 1950.  These tornadoes occurred in the late afternoon to early evening hours in central and southern Iowa and into the late evening across far eastern Iowa.  There were four EF0s, eight EF1s and six EF2s on this day with the town of Seymour and Muscatine both sustaining EF2 damage.  The tornadoes were often long tracked, partly due to the rapid forward translation sometimes exceeding 60 mph.  There were a number of tornadoes in April and May with another substantial tornado day occurring on June 28th when 11 tornadoes were observed in portions of southern and eastern Iowa.  Fortunately, most of these tornadoes remained in rural locations with only minor damage reported despite the higher number of tornadoes. July and August also saw a number of tornadoes with an EF1 tornado hitting the town of McGregor and doing damage in business district.     


 

2017 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. 02/28/2017 5:53pm - 5:53pm Clinton 1.1 mi ENE of Folletts EF0 0.04 mi 0/0   N/A DVN
2. 03/06/2017 5:23pm - 5:26pm Webster 1.3 mi WNW of Lanyon EF0 2.38 mi 0/0   N/A DMX
3. 03/06/2017 5:28pm - 5:32pm Webster 1.7 mi E of Harcourt EF1 2.87 mi 0/0   N/A DMX
4. 03/06/2017 6:27pm - 6:44pm Boone
Story
2.9 mi ENE of Luther EF0 17.86 mi 0/0   N/A DMX
5. 03/06/2017 6:58pm - 7:04pm Hardin 3.5 mi E of Garden City EF1 6.32 mi 0/0   N/A DMX
6. 03/06/2017 7:19pm - 7:24pm Warren 3.2 mi NNE of Liberty Center EF1 4.83 mi 0/0   N/A DMX
7. 03/06/2017 7:29pm - 7:34pm Marion 4.4 mi NNW of Melcher-Dallas EF1 5.33 mi 0/0   N/A DMX
8. 03/06/2017 7:35pm - 7:42pm Marion 4.8 mi SE of Pleasantville EF1 6.76 mi 0/0   N/A DMX
9. 03/06/2017 7:47pm - 7:52pm Marion 1.8 mi ESE of Otley EF0 5.45 mi 0/0   N/A DMX
10. 03/06/2017 8:16pm - 8:29pm Wayne
Appanoose
3.3 mi SE of Sewal EF2 14.92 mi 0/0   N/A DMX
11. 03/06/2017 8:30pm - 8:37pm Appanoose 0.9 mi E of Cincinnati EF1 8.01 0/0   N/A DMX
12. 03/06/2017 8:33pm - 8:42pm Appanoose 1.4 mi ENE of the Centerville Airport EF2 9.66 mi 0/0   N/A DMX
13. 03/06/2017 9:47pm - 9:55pm Dubuque 1 mi S of Bernard EF0 5.7 mi 0/0   N/A DVN
14. 03/06/2017 9:56pm - 9:57pm Louisa 3.7 mi W of Grandview EF2 0.3 mi 0/0   N/A DVN
15. 03/06/2017 10:05pm - 10:07pm Muscatine 1.8 mi SW of Muscatine EF2 1.8 mi 3/0   N/A DVN
16. 03/06/2017 10:13pm - 10:36pm Muscatine
Scott
2.8 mi WSW of Montpelier EF2 25.3 mi 0/0   N/A DVN
17. 03/06/2017 10:18pm - 10:31pm Cedar
Clinton
1.1 mi WNW of Bennett EF1 16.7 mi 0/0   N/A DVN
18. 03/06/2017 10:19pm - 10:45pm Scott
Clinton
1.4 mi NW of Walcott EF2 34.7 mi 0/0   N/A DVN
19. 03/06/2017 10:40pm - 10:45pm Clinton 1.6 mi W of Folletts EF1 4.36 mi 0/0   N/A DVN
20. 04/15/2017 8:50pm - 8:55pm Jones 4.0 mi NE of Anamosa EF1 2.33 mi 0/0   N/A DVN
21. 05/10/2017 2:46pm - 2:52pm Van Buren
Henry
4.1 mi E of Stockport EF0 2.84 mi 0/0   N/A DVN
22. 05/15/2017 6:45pm - 6:47pm Winneshiek 2.0 mi SE of Spillville EF0 1.00 mi 0/0   N/A ARX
23. 05/17/2017 3:10pm - 3:12pm Sioux 3.1 NNE of Alton EF0 0.02 mi 0/0   N/A   FSD
24. 05/17/2017 3:42pm - 3:44pm Sioux 1.7 WSW of Matlock EF0 0.02 mi 0/0   N/A   FSD
25. 05/17/2017 5:16pm - 5:20pm Jefferson Washington 3.8 mi W of Pleasant Plain EF1 3.27 mi 0/0   N/A DVN
26. 05/17/2017 7:36pm - 7:42pm Washington 6.8 mi WSW of Riverside EF1 5.95 mi 0/0   N/A DVN
27. 05/17/2017 6:50pm - 6:51pm Winneshiek 3.6 mi SSE of Bluffton EF0 0.20 mi 0/0   N/A ARX
28. 05/17/2017 8:44pm - 8:46pm Scott 2.5 mi WNW of Donahue EF0 2.14 mi 0/0   N/A DVN
29. 06/16/2017 8:05pm - 8:18pm Sarpy Co, Nebr.
Mills
1.5 mi SSW of Ft. Crook, NE EF2 13.99 mi 0/0   N/A   OAX
30. 06/16/2017 8:08pm - 8:13pm Sarpy Co, Nebr.
Mills
0.8 mi NE of Ft. Crook, NE EF1 6.65 mi 0/0   N/A   OAX
31. 06/28/2017 3:46pm - 3:59pm Fremont 3.6 SSE of Anderson EF2 3.70 mi 0/0   N/A   OAX
32. 06/28/2017 3:57pm - 4:30pm Adair 3.5 ESE of Canby EF0 14.93 mi 0/0   N/A   DMX
33. 06/28/2017 4:21pm - 4:28pm Page 1.6 NNW of Bingham EF1 2.12 mi 0/0   N/A   OAX
34. 06/28/2017 4:21pm - 4:30pm Adams 3.3 WNW of Carbon EF1 3.78 mi 0/0   N/A   DMX
35. 06/28/2017 4:43pm - 4:46pm Adams 2.9 S of Carl EF0 1.94 mi 0/0   N/A   DMX
36. 06/28/2017 4:45pm- 5:00pm Adair
Madison
3.0 NW of Hebron EF1 7.59 mi 0/0   N/A   DMX
37. 06/28/2017 5:05pm - 5:35pm Taylor 4.3 SW of Bedford Airport EF1 8.00 mi 0/0   N/A   DMX
38. 06/28/2017 5:54pm- 6:26pm Warren
Marion
3.2 SE of Sandyville EF1 17.80 mi 0/0   N/A   DMX
39. 06/28/2017 6:18pm - 6:19pm Warren 2.3 E of New Virginia EF0 0.51 mi 0/0   N/A   DMX
40. 06/28/2017 6:38pm - 7:01pm Linn
Jones
0.6 SSE of Central City EF2 11.69 mi 1/0   N/A   DVN
41. 06/28/2017 7:14pm - 7:18pm Jones
Delaware
4.2 N of Monticello EF2 2.50 mi 0/0   N/A   DVN
42. 06/28/2017 7:26pm Benton 2.4 ESE of Vinton EF0 0.02 mi 0/0   N/A   DVN
43. 06/28/2017 7:56pm - 8:00pm Cedar 4.6 NW of Massillon EF1 2.00 mi 0/0   N/A   DVN
44. 07/11/2017 4:35pm - 4:54pm Iowa 2.2 SSE of Conroy EF1 4.58 mi 0/0   N/A   DVN
45. 07/19/2017 4:15pm - 4:16pm Howard 3.6 W of Maple Leaf EF0 0.72 mi 0/0   N/A   ARX
46. 07/19/2017 5:08pm - 5:16pm Clayton 0.4 NE of Giard EF1 5.70 mi 2/0   N/A   ARX
47. 07/26/2017 5:06pm - 5:10pm Clinton 2.1 SW of DeWitt EF0 1.27 mi 0/0   N/A   DVN
48. 08/18/2017 6:47pm - 6:54pm Nobles Co, MN
Osceola
2.5 W of Bigelow, MN EF1 1.97 mi 0/0   N/A   FSD
49. 08/18/2017 7:07pm - 7:27pm Osceola 4.9 SE of Sibley EF2 6.00 mi 0/0   N/A   FSD
50. 08/18/2017 8:21pm - 8:22pm Cherokee 2.8 ESE of Larrabee EF0 0.29 mi 0/0   N/A   FSD

 


* 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).