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: 15

EF0 (13)
EF1 (2)
EF2 (0)
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 07/10/2018

Above is a map of the tornadoes that occurred across Iowa in 2018. 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.


2018 Iowa Tornado Summary  

    A total of 15 tornadoes have occurred across the state of Iowa so far in 2018.  Most of the tornadoes have been very weak and short lived.  The first tornado of the year did not occur until May 3rd which is around a month later than usual.  Three tornadoes occurred on that day with two in southwest Jasper county and one in northern Marion county.  All were weak and short lived with only crop and tree damage noted.  The next tornado occurrence was on Memorial Day when a weak tornado occurred southeast of Plover in Pocahontas county remaining in rural agricultural land.  Another similar tornado spun-up on the next day just northeast of Ames and remained over cropland.  The tornadoes in June occurred mainly on two days, the 9th and 20th.  Three tornadoes touched down on June 9th in northern Iowa with two EF1 tornadoes occurring, one near Forest City and the other southeast of Winthrop.  On the 20th, five tornadoes occurred, mainly in central Iowa with all of the EF0 in strength.   


 

2018 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. 05/03/2018 7:46pm - 7:47pm Jasper 3.8 mi SSW of Priarie City EF0 0.43 mi 0/0   N/A   DMX
2. 05/03/2018 7:48pm - 7:50pm Marion 3.8 mi ENE of Swan EF0 1.07 mi 0/0   N/A   DMX
3. 05/03/2018 7:56pm - 7:57pm Jasper 4.7 mi E of Prairie City  EF0 0.39 mi 0/0   N/A   DMX
4. 05/03/2018 11:15pm - 11:17pm Jones 0.4 mi NW of Olin EF0 0.10 mi 0/0   N/A   DVN
5. 05/28/2018 2:20pm - 2:22pm Pocahontas 2.5 mi ESE of Plover EF0 0.87 mi 0/0   N/A   DMX
6. 05/29/2018 3:58pm - 4:01pm Story 3.9 mi ENE of Ames EF0 0.30 mi 0/0   N/A   DMX
7. 06/09/2018 3:07pm - 3:13pm Winnebago 2.0 mi S of Leland EF1 2.75 mi 0/0   N/A   DMX
8. 06/09/2018 3:36pm - 3:38pm Cerro Gordo 5.3 mi NNW of Clear Lake EF0 1.18 mi 0/0   N/A   DMX
9. 06/09/2018 9:36pm - 9:37pm Buchanan 6.0 mi SE of Winthrop EF1 0.10 mi 0/0   N/A   DVN
10. 06/20/2018 2:18pm - 2:29pm Dallas/Boone 0.8 mi E of the Perry Airport EF0 2.78 mi 0/0   N/A   DMX
11. 06/20/2018 2:20pm - 2:24pm Greene 1.8 mi NNW of Scranton EF0 0.57 mi 0/0   N/A   DMX
12. 06/20/2018 2:31pm - 2:39pm Keokuk 1.0 mi ESE of Delta EF0 6.30 mi 0/0   N/A   DVN
13. 06/20/2018 3:27pm - 3:28pm Hardin 3.1 mi SE of Eldora EF0 0.27 mi 0/0   N/A   DMX
14. 06/20/2018 5:15pm - 5:17pm Wapello 3.8 mi NNE of Blakesburg EF0 0.51 mi 0/0   N/A   DMX
15. 06/25/2018 5:14pm - 5:16pm Ringgold 0.7 SW of Delphos EF0 0.73 mi 0/0   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).