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.

  1. EF065 to 85 mph

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. EF186 to 110 mphthis tornado

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. 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.

  4. 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.

  5. EF4166 to 200 mph

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. 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.

  7. 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.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2026-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 24 joules per kilogram, CIN -119, lifted condensation level 1105 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2026-08-01The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 75 square meters per square second, 0 to 6 km bulk shear 25 knots.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
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

Open this sounding in Storm Lab

Cncnati-Daytn, OH (KILN), 00:00Z

1.5 hours after it, 103 km from the path. August 2, 2026.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2026-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 949 joules per kilogram, CIN -4, lifted condensation level 578 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2026-08-02The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 173 square meters per square second, 0 to 6 km bulk shear 48 knots.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
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

Open this sounding in Storm Lab

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)ReportWhereCountyRemark
22:14 UTCFLOOD3 Ssw RushvilleRush, INReports of high water across the road 3 miles south of Rushville on State Rd. 3.
22:32 UTCTORNADO3 Wsw Saint LeonDearborn, INAn 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 UTCTORNADO3 Wsw Saint LeonDearborn, INCorrects 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 UTCTSTM WND DMG3 Nw Saint LeonFranklin, INHouse damage along with small barn/garage.
23:00 UTCRAIN 0.951 Nnw HartsvilleBartholomew, INMesonet station CCHI3 0.6 N Hartsville.
00:05 UTCRAIN 1.181 Ese ManillaRush, INMesonet 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.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
August 11:21 PM CDTEF0Bledsoe, TN0.3100
August 15:20 PM EDTEF0Marion, IN0.2100
August 16:21 PM CDTEF0Bledsoe, TN1.8140
August 16:32 PM CDTEF0Fentress, TN0.450
August 17:58 PM EDTEF1Preble, OH0.9250
August 18:23 PM EDTEF0Warren, OH1.8100
August 18:35 PM EDTEF0Montgomery, OH4.7150

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.