Tornadoes · United States · Indiana · 2026
EF1 tornado, Dearborn and Franklin counties, Indiana, August 1, 2026
This EF1 tornado ran 5.2 miles across Dearborn and Franklin counties on August 1, 2026, touching down at 6:32 PM EDT and reaching 90 yards wide. It killed nobody.
Preliminary. This is NWS ILN's damage survey, filed in the Damage Assessment Toolkit as St. Leon IN. The rating, the path and the casualties are the survey's and can change while it is revised. The Storm Prediction Center compiles the official record of 2026 from these surveys and publishes it in the spring of 2027; this page moves to that tornado's permanent address when it does.
The rating scale
Tracks are drawn in the color of the rating. The Enhanced Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.
EF065 to 85 mph
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
EF186 to 110 mphthis tornado
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
EF2111 to 135 mph
Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.
EF3136 to 165 mph
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
EF4166 to 200 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
EF5over 200 mph
Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.
Unrated
The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.
The survey
- Rating, as surveyed
- EF1, preliminary
- Date
- August 1, 2026
- Touchdown
- 6:32 PM EDT (22:32 UTC)
- Lifted
- 6:43 PM EDT (22:43 UTC)
- On the ground
- 11 minutes
- Path length
- 5.2 miles (8.4 km)
- Path width
- 90 yards (82 m)
- Deaths
- 0
- Injuries
- 0
- Counties
- Dearborn and Franklin counties
- Touchdown point
- 39.277, -85.014
- Lift-off point
- 39.344, -84.972
- Highest wind the damage implies
- 90 mph
- Surveyed by
- NWS ILN
- The office's name for it
- St. Leon IN
- Survey last edited
- August 4, 2026
- Record number
- None yet. SPC numbers 2026 in the spring of 2027.
What the survey found
The National Weather Service has updated EF0 tornado during the early
evening of August 1, 2026 in Dearborn and Franklin counties in Indiana.
A concentrated area of damage in southeast Franklin County was updated
to 90 MPH or EF1 damage.
Damage was first observed just east of Lawrenceville, Indiana along
Batta Road, near the Batta and Legion Road intersection. Some
roof damage to farm buildings was observed, as well as a large farm
wagon overturned. The tornado appeared to cross over farm fields
where crops were flattened. The tornado then crossed Legion Road
where there were several large trees that were damaged or snapped.
Peak wind in this area was estimated to be near 70 MPH.
The tornado continued north-northeast and continued to produce
tree damage as well as garage door damage along Trackville Road just
north of Old Hickory Road. Peak wind in this area was estimated to
be between 70 and 75 MPH.
The tornado continued into southeast Franklin County, where it
strengthened slightly to produce roof damage to a single family home
as well as roof and wall damage to barns. Peak wind in this area
was estimated to be between 75 and 80 MPH.
The tornado continued north-northeast to properties just northwest of
the intersection of Saint Peters and Stone Roads. There was additional
roof damage to a single family home, as well as the destruction of
3 barns, as well as some snapped pine trees and hardwood tree damage.
It was in this area where the peak wind was updated to near 90
MPH or EF1 damage.
The tornado continued to move north-northeast along a narrow path through
southeast Franklin County, producing additional barn and tree damage along
Wewe Hill Road which was consistent with wind damage between 70 and 75 MPH.
The tornado is believed to have dissipated just north of where Wewe Hill
Road becomes West to East, about 2 miles southwest of Cedar Grove.
The National Weather Service would like to thank the emergency
management agencies in Dearborn and Franklin Counties for
their assistance in this damage survey.
Written by NWS ILN in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.
The damage survey
27 damage points were recorded along this path by NWS ILN, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 90 mph.
- Brick home with portion of its roof lifted, damage to outdoor structures, trees.
- Damage to a barn and garage.
- Garage door blown in slightly. Already fixed at survey time.
- Large Farm Wagon overturned
Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.
The warnings
No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.
Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.
The forecast that day
The Storm Prediction Center had this point in a Slight Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 19:56 UTC.
SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.
The air that afternoon
The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.
Cncnati-Daytn, OH (KILN), 12:00Z
10.5 hours before the tornado, 103 km from the path. August 1, 2026.
- Mixed-layer CAPE
- 24 J/kg
- Mixed-layer CIN
- -119 J/kg
- Surface CAPE
- 9 J/kg
- Mixed-layer LCL
- 1105 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 4.6 K/km
Cncnati-Daytn, OH (KILN), 00:00Z
1.5 hours after it, 103 km from the path. August 2, 2026.
- Mixed-layer CAPE
- 949 J/kg
- Mixed-layer CIN
- -4 J/kg
- Surface CAPE
- 1246 J/kg
- Mixed-layer LCL
- 578 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.1
- 0-3 km lapse rate
- 5.6 K/km
The radar
The Cincinnati radar (KILN), 101 km away, was scanning. The volume nearest the touchdown began at 22:30 UTC.
Open the radar archive at this moment, over the track
Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.
What was reported nearby
Local storm reports within 60 km of the path, in the three hours either side.
| Time (UTC) | Report | Where | County | Remark |
|---|---|---|---|---|
| 22:14 UTC | FLOOD | 3 Ssw Rushville | Rush, IN | Reports of high water across the road 3 miles south of Rushville on State Rd. 3. |
| 22:32 UTC | TORNADO | 3 Wsw Saint Leon | Dearborn, IN | An EF-0 tornado occurred just east of Lawrenceville in northern Dearborn County. The tornado moved north-northeast and resulted in additional damage along a path in southeast Dearborn County. Damage occurred to outbuildi |
| 22:32 UTC | TORNADO | 3 Wsw Saint Leon | Dearborn, IN | Corrects previous tornado report from 3 WSW Saint Leon. An EF-1 tornado occurred just east of Lawrenceville in northern Dearborn County. The tornado moved north-northeast and resulted in additional damage along a path in |
| 22:35 UTC | TSTM WND DMG | 3 Nw Saint Leon | Franklin, IN | House damage along with small barn/garage. |
| 23:00 UTC | RAIN 0.95 | 1 Nnw Hartsville | Bartholomew, IN | Mesonet station CCHI3 0.6 N Hartsville. |
| 00:05 UTC | RAIN 1.18 | 1 Ese Manilla | Rush, IN | Mesonet station MNLLA Manilla. |
From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.
This ground now
The live radar over the trackEvery 2026 tornado in IndianaEvery tornado in Indiana since 1950Warnings in force in Indiana nowThe forecast where you are
The other tornadoes of August 1, 2026
7 more have been surveyed in the United States that day, so far.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| August 1 | 1:21 PM CDT | EF0 | Bledsoe, TN | 0.3 | 100 | |||
| August 1 | 5:20 PM EDT | EF0 | Marion, IN | 0.2 | 100 | |||
| August 1 | 6:21 PM CDT | EF0 | Bledsoe, TN | 1.8 | 140 | |||
| August 1 | 6:32 PM CDT | EF0 | Fentress, TN | 0.4 | 50 | |||
| August 1 | 7:58 PM EDT | EF1 | Preble, OH | 0.9 | 250 | |||
| August 1 | 8:23 PM EDT | EF0 | Warren, OH | 1.8 | 100 | |||
| August 1 | 8:35 PM EDT | EF0 | Montgomery, OH | 4.7 | 150 |
What this means
Ratings are the survey's, read off the damage rather than measured; the rating scale is above. A survey can be revised, so the rating, the path and the casualties can all still change.
Sources
NWS Damage Assessment Toolkit, the record the survey teams file from the damage, and NOAA Storm Prediction Center storm reports. Neither is the official database for 2026, which SPC publishes in the spring of 2027.