Tornadoes · United States · Indiana · 2026
EF1 tornado, Knox County, Indiana, August 12, 2026
This EF1 tornado ran 1.5 miles across Knox County on August 12, 2026, touching down at 3:03 PM EDT and reaching 150 yards wide. It killed nobody.
Preliminary. This is NWS IND's damage survey, filed in the Damage Assessment Toolkit. 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 12, 2026
- Touchdown
- 3:03 PM EDT (19:03 UTC)
- Lifted
- 3:07 PM EDT (19:07 UTC)
- On the ground
- 4 minutes
- Path length
- 1.5 miles (2.4 km)
- Path width
- 150 yards (137 m)
- Deaths
- 0
- Injuries
- 0
- County
- Knox County
- Touchdown point
- 38.797, -87.436
- Lift-off point
- 38.780, -87.421
- Highest wind the damage implies
- 100 mph
- Surveyed by
- NWS IND
- Survey last edited
- August 13, 2026
- Record number
- None yet. SPC numbers 2026 in the spring of 2027.
What the survey found
The tornado began in a tree grove northwest of Maria Creek with multiple videos of the tornado looking from US 41 to the northwest. The tornado impacted several groves of trees along Maria Creek and through Morgan and Hollingsworth Road before impacting an outbuilding along East Hollingsworth Road and dissipating in a field to the southeast.
Written by NWS IND in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.
The damage survey
8 damage points were recorded along this path by NWS IND, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 100 mph.
- Snapped trees along Maria Creek
- Debris strewn both upstream and downstream.
- Pocket of localized tree snap/uproot.
- Several trees snapped along Hollingsworth Road
Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.
The warnings
0 minutes of warning. NWS IND issued a tornado warning for this county at 19:03 UTC, 0 minutes before the tornado touched down, in force until 19:23 UTC.
The county was under a severe thunderstorm watch, issued at 18:05 UTC and running to 20:31 UTC.
| Issued (UTC) | Expired | Product | Office |
|---|---|---|---|
| 18:05 UTC | 20:31 UTC | Severe Thunderstorm Watch | IND |
| 18:35 UTC | 19:15 UTC | Severe Thunderstorm Warning | IND |
| 18:42 UTC | 19:30 UTC | Severe Thunderstorm Warning | IND |
| 19:03 UTC | 19:23 UTC | Tornado Warning | IND |
| 19:22 UTC | 20:00 UTC | Severe Thunderstorm Warning | IND |
| 19:41 UTC | 19:52 UTC | Tornado Warning | IND |
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 16:30 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.
What forecasters said that day
The local office's own words before the tornado touched down, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Indianapolis, IN wrote its last area forecast discussion before the tornado touched down at Aug 12, 2:49 PM EDT, 14 minutes earlier. Its key messages:
- Marginally severe storms through daybreak along with potential additional flooding
- Flood Watch continues through today with additional strong to severe storms through the day, mainly during the afternoon
- Damaging winds will be the main threat today outside of flooding
- Storm chances continue through the rest of the week, severe weather threat looks lower
Area forecast discussion, Aug 12, 2:49 PM EDT, 14 minutes before
Area Forecast Discussion National Weather Service Indianapolis IN 249 PM EDT Wed Aug 12 2026 .KEY MESSAGES... - Marginally severe storms through daybreak along with potential additional flooding - Flood Watch continues through today with additional strong to severe storms through the day, mainly during the afternoon - Damaging winds will be the main threat today outside of flooding - Storm chances continue through the rest of the week, severe weather threat looks lower && .DISCUSSION (This evening through Wednesday)... Issued at 249 PM EDT Wed Aug 12 2026 Surface Analysis this afternoon shows a broad surface trough stretching from central IL to across Central Indiana. Convection continued along this trough spreading showers and thunderstorms across much of Central Indiana. Water vapor shows a steady NW flow aloft in place, with an wave over IL, generating convection downstream. Dewpoints remained high, in the 60s as much of the area was under the influence of rain cooled air, however across southwest Central Indiana, dew points were in the 70s, providing very humid conditions along with the best instability. This afternoon through the overnight... The Thunderstorm complex over Central Indiana will continue to propagate SE across Central Indiana through the late afternoon hours. Heavy rains may result in additional flooding and severe storms cannot be ruled out. Near 00Z the HRRR progresses this system further SE, exiting Central Indiana as the forcing with upper wave exits. Clouds will remain across the area through the evening with rain cooled air in place. Overnight as the LLJ resumes, more storm development will be possible, but at this time HRRR is developing storms along the boundary which at that time should be located across southern Central Indiana due to the southward push from today's convection. Thus will focus best pops overnight in those locations. Fog will also be possible overnight due to high dew points, light winds and plenty of lingering lower level moisture. Thursday and Thursday Night... More rain chances will be expected on Thursday afternoon and into Thursday night. The persistent NW flow aloft is once again expected to continue across central Indiana. An upper level wave is expected to pass across central Indiana providing forcing through the afternoon hours. The location of the surface trough will be key in best initiation and propagation area. For now, this is suggested to be across southern Central Indiana, but changes can occur overnight. Forecast soundings show shallower CAPE at that time with values only around 1000-1500 J/kg across Central Indiana, but much higher values south of boundary in the warmer and humid air mass. Thus will again use high pops on Thursday afternoon for more showers and storm development given the familiar, favorable set-up in place. Again, best chances for now will be across southern Central Indiana which is the expected location of the surface trough. Flash Flood Watch will be extended. Friday and Friday Night... Strong ridging within the upper flow is expected to push east toward Indiana on Friday. This will allow surface warm front to surge across Central Indiana as flow becomes southwesterly. Forecast soundings again on Friday show a nearly saturated column at times, with pwats once again over 2 inches. Again shallow CAPE appears available. Thus again likely pops will be needed from the afternoon and into the evening as the warm front surges northeast across the area and acts as a focus for convection. Saturday through Sunday Night... Rain chances will persist on Saturday and Sunday as a warm frontal boundary is suggested to be lingering across Central Indiana. Working against this will be the pattern aloft where upper level ridging will be building across Indiana from the west. This will result in some subsidence within the mid and upper levels. However, diurnal convection cannot be ruled out due to the frontal boundary that will be present across the area on Saturday as a warm front and on Sunday as a cold front crossing Indiana. SW flow ahead of the cold front will result in hot weather on Saturday and again on Sunday with highs in the 90s. Monday through Wednesday... Better chances for dry weather and temperatures closer to normal will be expected during this time. Northwest flow is expected to resume across the area on Monday due to upper ridging in place over the Rockies. Little in the way of forcing looks to pass during this time. Meanwhile at the lower levels, stronger Canadian high pressure will be building behind Sunday's cold front on Monday and through the first part of the next work week. This should result in partly cloudy skies and highs in the 80s. Temps will moderate by Wednesday as the surface high drifts farther east and southerly return flow begins. && .AVIATION (18Z TAF Issuance)... Issued at 249 PM EDT Wed Aug 12 2026 Impacts: - Thunderstorms moving across the area through 22Z. Brief MVFR conditions possible with any TSRA that strikes a TAF site. - Fog development expected tonight, especially near LAF/HUF. Possible MVFR/IFR. - TSRA return on Thursday after 18Z. Discussion: Thunderstorm complex across across Indiana will be passing across HUF and IND near 18Z, then diving south to BMG by 19Z-20Z. MVFR conditions will be possible with any TSRA. HRRR suggests the convection dives SE and ends this evening. This should lead to some convective debris clouds providing VFR Cigs through the evening and overnight. Fog will be possible overnight, as light winds, high dew points and recent rain provide good conditions for fog development. Additional convection will be possible after 18Z on Thursday as another upper wave arrives and interacts with the warm and humid air mass across central Indiana. && .IND WATCHES/WARNINGS/ADVISORIES... Flood Watch through Thursday evening for INZ021-028>031-035>049- 054>057-063>065-072. Flood Watch through Thursday evening for INZ051>053-060>062- 069>071. && AVIATION...Puma DISCUSSION...Puma
Hazardous weather outlook, Aug 12, 11:11 AM EDT, 3 hours 52 minutes before
Hazardous Weather Outlook National Weather Service Indianapolis IN 1111 AM EDT Wed Aug 12 2026 INZ021-028>031-035>049-051>057-060>065-067>072-131515- Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone- Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam- Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby- Rush-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess- Martin-Lawrence-Jackson-Jennings- 1111 AM EDT Wed Aug 12 2026 This hazardous weather outlook is for central Indiana. .DAY ONE...Through Tonight. Flooding and flash flooding will continue across eastern Indiana. More showers and storms are expected. This may result in additional flooding or a worsening of ongoing flooding. Damaging winds will also be possible with thunderstorms this afternoon and into the evening. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Thunderstorms will be possible at times through the week, with potential for multiple rounds of severe storms through at least Thursday. Damaging winds and heavy rainfall will be the primary threats. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to remain vigilant this week as multiple rounds of severe storms will be possible. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind JP
In the hours before
Special weather statement, Aug 12, 2:09 PM EDT, 54 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
209 PM EDT Wed Aug 12 2026
INZ045-051>054-060-061-121845-
Clay IN-Owen IN-Morgan IN-Putnam IN-Greene IN-Vigo IN-Sullivan IN-
209 PM EDT Wed Aug 12 2026
...Strong thunderstorms will impact portions of southern Vigo,
northwestern Morgan, Sullivan, Clay, northwestern Owen, northwestern
Greene and southern Putnam Counties through 245 PM EDT...
At 208 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Brazil to 11 miles south of Terre Haute to near
Hutsonville. Movement was east at 35 mph.
HAZARD...Wind gusts up to 50 mph, frequent lightning, very heavy
rain, and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Terre Haute, Brazil, Sullivan, Jasonville, Cloverdale, Shelburn,
Prairieton, Prairie Creek, Farmersburg, Seelyville, Knightsville,
Clay City, Hymera, Fairbanks, Harmony, Staunton, Center Point, Merom,
Riley, and Quincy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to flash flooding. Do not drive your vehicle through flooded
roadways.
A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
central, southwestern and west central Indiana.
&&
LAT...LON 3917 8764 3922 8757 3925 8757 3925 8760
3930 8760 3930 8762 3934 8759 3934 8756
3937 8753 3961 8707 3960 8655 3929 8689
3897 8745 3903 8757 3906 8757 3909 8762
3910 8761 3911 8765 3912 8763 3913 8766
TIME...MOT...LOC 1808Z 271DEG 30KT 3952 8712 3931 8739 3916 8761
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
BRBSpecial weather statement, Aug 12, 2:30 PM EDT, 33 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
230 PM EDT Wed Aug 12 2026
INZ054>056-063>065-071-121900-
Johnson IN-Brown IN-Morgan IN-Decatur IN-Bartholomew IN-Shelby IN-
Jackson IN-
230 PM EDT Wed Aug 12 2026
...Strong thunderstorms will impact portions of southern Shelby,
southeastern Morgan, southern Decatur, northeastern Brown, southern
Johnson, Bartholomew and northeastern Jackson Counties through 300 PM
EDT...
At 229 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles southwest of Shelbyville to 10 miles
north of Nashville. Movement was southeast at 45 mph.
HAZARD...Wind gusts up to 50 mph and very heavy rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Columbus, Greensburg, Nashville, Edinburgh, Hope, Flat Rock, Milford,
Westport, Princes Lakes, Trafalgar, Morgantown, Elizabethtown,
Hartsville, Clifford, Jonesville, Millhousen, Peoga, Newbern,
Beanblossom, and Gnaw Bone.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms could cause
flash flooding for portions of the area. Do not drive your vehicle
through flooded roadways.
A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
central, south central and southeastern Indiana.
&&
LAT...LON 3917 8549 3913 8561 3913 8580 3906 8580
3899 8602 3932 8638 3934 8638 3934 8640
3945 8601 3928 8530 3927 8530
TIME...MOT...LOC 1829Z 292DEG 39KT 3943 8586 3935 8624
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
BRBLocal storm report, Aug 12, 2:47 PM EDT, 16 minutes before
Preliminary Local Storm Report
National Weather Service Indianapolis IN
247 PM EDT Wed Aug 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0146 PM Rain 4 SW Westfield 40.01N 86.18W
08/12/2026 M1.26 Inch Hamilton IN Trained Spotter
Amount from 1230 PM to 140 PM EDT.
&&
BHLocal storm report, Aug 12, 2:51 PM EDT, 12 minutes before
Preliminary Local Storm Report
National Weather Service Indianapolis IN
251 PM EDT Wed Aug 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1100 AM Flash Flood Muncie 40.20N 85.39W
08/12/2026 Delaware IN Public
Water is above the curb and over the
sidewalk in a residential neighborhood on
the south side of the street. Water is
encroaching on homes.
&&
BHLocal storm report, Aug 12, 2:53 PM EDT, 10 minutes before
Preliminary Local Storm Report
National Weather Service Indianapolis IN
253 PM EDT Wed Aug 12 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1153 AM Flash Flood 1 NW New Castle 39.93N 85.38W
08/12/2026 Henry IN Public
Flooding at Kroger, a gas station, and road
intersections.
&&
BHSpecial weather statement, Aug 12, 2:54 PM EDT, 9 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
254 PM EDT Wed Aug 12 2026
INZ063>065-072-121930-
Brown IN-Decatur IN-Bartholomew IN-Jennings IN-
254 PM EDT Wed Aug 12 2026
...Strong thunderstorms will impact portions of southern Decatur,
Brown, Bartholomew and northern Jennings Counties through 330 PM
EDT...
At 254 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Greensburg to Columbus to Nashville. Movement
was southeast at 30 mph.
HAZARD...Wind gusts up to 50 mph and very heavy rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs or uproot some
trees, and blow around unsecured objects.
Locations impacted include...
Columbus, Greensburg, Nashville, Edinburgh, Hope, Westport,
Elizabethtown, Hartsville, Clifford, Jonesville, Millhousen, Peoga,
Newbern, Beanblossom, Gnaw Bone, Nebraska, Spurgeons Corner, Azalia,
Elkinsville, and Country Squire Lakes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
A Severe Thunderstorm Watch remains in effect until 500 PM EDT for
central, south central and southeastern Indiana.
&&
LAT...LON 3920 8544 3904 8544 3905 8580 3907 8580
3904 8587 3905 8637 3934 8638 3935 8557
3928 8530
TIME...MOT...LOC 1854Z 294DEG 25KT 3933 8545 3920 8589 3919 8621
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
BRBThe 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.
Lincoln, IL (KILX), 12:00Z
7.1 hours before the tornado, 182 km from the path. August 12, 2026.
- Mixed-layer CAPE
- 2166 J/kg
- Mixed-layer CIN
- -186 J/kg
- Surface CAPE
- 2407 J/kg
- Mixed-layer LCL
- 1652 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 4.1 K/km
Lincoln, IL (KILX), 00:00Z
4.9 hours after it, 182 km from the path. August 13, 2026.
- Mixed-layer CAPE
- 366 J/kg
- Mixed-layer CIN
- -161 J/kg
- Surface CAPE
- 1576 J/kg
- Mixed-layer LCL
- 928 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 279 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 9.7
- 0-3 km lapse rate
- 5.8 K/km
The surface observations
Lawrenceville (LWV), 16 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 17:05 UTC | 160° 13 kt | 1011.5 | ||||
| 17:10 UTC | 170° 14 kt | 1011.5 | ||||
| 17:15 UTC | 170° 14 kt | 1011.5 | ||||
| 17:20 UTC | 180° 13 kt | 1011.5 | ||||
| 17:25 UTC | 180° 13 kt | 1011.5 | ||||
| 17:30 UTC | 170° 13 kt | 1011.5 | ||||
| 17:35 UTC | 180° 11 kt | 1011.9 | ||||
| 17:40 UTC | 170° 11 kt | 1011.9 | ||||
| 17:45 UTC | 150° 10 kt | 1011.9 | ||||
| 17:50 UTC | 160° 10 kt | 1011.9 | ||||
| 17:53 UTC | 87 | 77 | 170° 9 kt | 1011.9 | ||
| 17:55 UTC | 150° 9 kt | 1011.9 | ||||
| 18:00 UTC | 160° 10 kt | 1011.5 | ||||
| 18:05 UTC | 180° 10 kt | 1011.5 | ||||
| 18:10 UTC | 13 kt | 1011.2 | ||||
| 18:15 UTC | 180° 11 kt | 1011.2 | ||||
| 18:20 UTC | 170° 9 kt | 1011.5 | ||||
| 18:25 UTC | 160° 10 kt | 1011.5 | ||||
| 18:30 UTC | 160° 11 kt | 1011.5 | ||||
| 18:35 UTC | 11 kt | 1011.5 | ||||
| 18:36 UTC | 87 | 77 | 170° 11 kt | 1011.5 | VCTS | |
| 18:40 UTC | 1011.2 | |||||
| 18:45 UTC | 1011.2 | |||||
| 18:50 UTC | 1010.8 | |||||
| 18:53 UTC | 87 | 78 | 240° 16 kt | 23 | 1010.8 | TS |
| 18:55 UTC | 23 | 1011.5 | ||||
| 19:00 UTC | 87 | 76 | 310° 18 kt | 24 | 1011.9 | TS |
| 19:00 UTC | 23 | 1011.9 | ||||
| 19:05 UTC | 1012.2 | |||||
| 19:10 UTC | 26 | 1012.5 | ||||
| 19:13 UTC | 84 | 75 | 350° 19 kt | 28 | 1012.5 | TS |
| 19:15 UTC | 1012.2 | |||||
| 19:20 UTC | 350° 15 kt | 1012.2 | ||||
| 19:23 UTC | 83 | 75 | 350° 13 kt | 22 | 1012.2 | VCTS |
| 19:25 UTC | 21 | 1012.2 | ||||
| 19:30 UTC | 81 | 75 | 40° 15 kt | 26 | 1012.5 | VCTS |
| 19:30 UTC | 15 kt | 21 | 1012.5 | |||
| 19:35 UTC | 30° 11 kt | 1012.9 | ||||
| 19:40 UTC | 50° 11 kt | 1012.5 | ||||
| 19:45 UTC | 50° 11 kt | 1012.2 | ||||
| 19:50 UTC | 70° 10 kt | 1012.2 | ||||
| 19:53 UTC | 79 | 71 | 70° 9 kt | 1011.9 | ||
| 19:55 UTC | 60° 12 kt | 1011.9 | ||||
| 20:00 UTC | 70° 10 kt | 1011.5 | ||||
| 20:05 UTC | 70° 10 kt | 1011.5 | ||||
| 20:10 UTC | 80° 9 kt | 1011.2 | ||||
| 20:15 UTC | 70° 10 kt | 1011.5 | ||||
| 20:20 UTC | 80° 8 kt | 1011.5 | ||||
| 20:25 UTC | 90° 9 kt | 1011.9 | ||||
| 20:30 UTC | 110° 11 kt | 16 | 1011.9 | |||
| 20:35 UTC | 100° 13 kt | 18 | 1011.5 | |||
| 20:40 UTC | 100° 14 kt | 1011.5 | ||||
| 20:45 UTC | 100° 13 kt | 1011.5 | ||||
| 20:50 UTC | 100° 11 kt | 1011.5 | ||||
| 20:53 UTC | 81 | 71 | 100° 10 kt | 1011.5 | ||
| 20:55 UTC | 90° 11 kt | 1011.5 | ||||
| 21:00 UTC | 90° 8 kt | 1011.9 |
From the Iowa Environmental Mesonet's archive of airport observations.
The radar
The Evansville,IN radar (KVWX), 64 km away, was scanning. The volume nearest the touchdown began at 19:01 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 |
|---|---|---|---|---|
| 19:03 UTC | TORNADO | 3 Nnw Bruceville | Knox, IN | A brief EF-1 tornado with estimated peak winds of 100 mph impacted several groves of trees and an outbuilding. There were multiple videos of the tornado and drone footage showed many trees snapped along the path. |
| 19:03 UTC | TORNADO | 3 Nnw Bruceville | Knox, IN | A brief EF-1 tornado with estimated peak winds of 100 mph impacted several groves of trees and an outbuilding. There were multiple videos of the tornado and drone footage showed many trees snapped along the path. |
| 19:05 UTC | TSTM WND DMG | 3 Nnw Bruceville | Knox, IN | Possible tornado. Debris in the air and trees blown down. |
| 19:05 UTC | TSTM WND DMG | 3 Nnw Bruceville | Knox, IN | Possible tornado. Debris in the air and trees blown down. |
| 19:05 UTC | TSTM WND DMG | 3 Nnw Bruceville | Knox, IN | Possible tornado. Debris in the air and trees blown down. |
| 20:00 UTC | RAIN 1.04 | Bicknell | Knox, IN | Mesonet station AV565 Bicknell. |
| 20:09 UTC | TORNADO | 1 Nw Winslow | Pike, IN | An EF-1 tornado with peak winds of 110 mph struck Winslow, Indiana, on the afternoon of August 12, 2026. The tornado began in a neighborhood just west of the intersection of Highway 61 and Brenton Street. Moving southeas |
| 20:10 UTC | TSTM WND DMG | Winslow | Pike, IN | Several trees uprooted, branches down and some structure damage to a home and barn. |
| 22:00 UTC | RAIN 1.3 | 1 W Washington | Daviess, IN | CO-OP Observer station WASI3 1.4 W Washington. |
| 22:00 UTC | RAIN 1.3 | 1 W Washington | Daviess, IN | CO-OP Observer station WASI3 1.4 W Washington. |
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 12, 2026
2 more have been surveyed in the United States that day, so far.
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.