Tornadoes · United States · Iowa · 2026

EF2 tornado, Adams County, Iowa, June 11, 2026

This EF2 tornado ran 6.0 miles across Adams County on June 11, 2026, touching down at 6:26 AM CDT and reaching 200 yards wide. It killed nobody.

Preliminary. This is NWS DMX's damage survey, filed in the Damage Assessment Toolkit as S_Adams. 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 mph

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

  3. EF2111 to 135 mphthis tornado

    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
EF2, preliminary
Date
June 11, 2026
Touchdown
6:26 AM CDT (11:26 UTC)
Lifted
6:32 AM CDT (11:32 UTC)
On the ground
6 minutes
Path length
6.0 miles (9.7 km)
Path width
200 yards (183 m)
Deaths
0
Injuries
0
County
Adams County
Touchdown point
40.932, -94.690
Lift-off point
40.983, -94.600
Highest wind the damage implies
115 mph
Surveyed by
NWS DMX
The office's name for it
S_Adams
Survey last edited
June 15, 2026
Record number
None yet. SPC numbers 2026 in the spring of 2027.

The damage survey

9 damage points were recorded along this path by NWS OAX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 105 mph.

  • Multiple trees with large limbs down. Clean breaks.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

The warnings

16 minutes of warning. NWS DMX issued a tornado warning for this county at 11:10 UTC, 16 minutes before the tornado touched down, in force until 11:45 UTC.

The county was under a severe thunderstorm watch, issued at 07:15 UTC and running to 15:00 UTC.

Issued (UTC)ExpiredProductOffice
19:12 UTC02:00 UTCTornado WatchDMX
07:15 UTC15:00 UTCSevere Thunderstorm WatchDMX
09:00 UTC15:29 UTCFlood WatchDMX
10:26 UTC11:15 UTCSevere Thunderstorm WarningDMX
10:59 UTC12:00 UTCSevere Thunderstorm WarningDMX
11:10 UTC11:45 UTCTornado WarningDMX
11:32 UTC11:51 UTCTornado WarningDMX
11:43 UTC12:30 UTCSevere Thunderstorm WarningDMX
12:13 UTC15:02 UTCFlash Flood WarningDMX

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 06:19 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.

Omaha, NE (KOAX), 00:00Z

11.4 hours before the tornado, 150 km from the path. June 11, 2026.

Skew-T log-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2026-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 90 joules per kilogram, CIN -68, lifted condensation level 2862 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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, Omaha, NE at 00:00Z on 2026-06-11The 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 -9 square meters per square second, 0 to 6 km bulk shear 41 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
90 J/kg
Mixed-layer CIN
-68 J/kg
Surface CAPE
691 J/kg
Mixed-layer LCL
2862 m above ground
0-6 km bulk shear
41 kt
0-1 km bulk shear
7 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1
0-3 km lapse rate
9.1 K/km

Open this sounding in Storm Lab

The radar

The Des Moines radar (KDMX), 115 km away, was scanning. The volume nearest the touchdown began at 11:24 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
10:19 UTCHAIL 2.5YorktownPage, IACorrects time from previous hail report from Yorktown.
10:19 UTCHAIL 31 E YorktownPage, IADelayed report received via social media of hail measured up to 3 inches in diameter with corresponding picture. Time estimated with radar.
10:19 UTCHAIL 3.5YorktownPage, IACorrects time from previous hail report from Yorktown. Delayed emergency management report of a measured hailstone 3.5 inches in diameter, shown in a photo next to a ruler. Time estimated with radar.
10:30 UTCHAIL 2.5YorktownPage, IA
10:30 UTCHAIL 3.5YorktownPage, IADelayed emergency management report of a measured hailstone 3.5 inches in diameter, shown in a photo next to a ruler. Time estimated with radar.
10:55 UTCTSTM WND GST 633.0 Nnw CoburgMontgomery, IA
10:55 UTCTSTM WND GST 90EssexPage, IA
10:56 UTCTSTM WND DMGEssexPage, IATrees blocking hwy 48 south of Essex.
10:58 UTCTORNADO4 Ese CoburgPage, IAAt approximately 5:58 AM, a tornado developed just east of Coburg, Iowa, near 105th Street and K Avenue, and moved east- southeast. The tornado produced sporadic tree damage with an estimated wind speeds of 70 mph. The t
10:58 UTCTORNADOCoburgMontgomery, IASmall tree and debris in Coburg.
11:01 UTCTSTM WND GST 714.9 Sse CoburgPage, IA
11:06 UTCTSTM WND GST 599.0 Ese OaklandPottawattamie, IA
11:07 UTCTSTM WND DMGCoburgMontgomery, IA60 mph wind estimated. quarter sized hail and large limbs down.
11:08 UTCTORNADO3 Ese StantonMontgomery, IAAt approximately 6:08 AM, a tornado developed east of Stanton, Iowa, near 230th Street and Q Avenue, and moved northeast. The tornado produced tree damage on the west side of Viking Lake, including large broken limbs and
11:11 UTCTORNADO3 S VilliscaPage, IAA brief tornado developed south of Villisca at approximately 6:11 AM. The tornado would track along 110th St between V Ave and Willow Ave before dissipating near the county line at 6:13 AM. Along the tornado`s path, tree
11:12 UTCTSTM WND DMG3 Sw VilliscaMontgomery, IAEmergency management report of several trees and large branches down along the Page/Montgomery county line. Power lines across roads. The majority of N/S roads are blocked by trees at some point in this area. Time estima
11:12 UTCTSTM WND GST 663.8 Se StantonMontgomery, IA
11:13 UTCTSTM WND GST 584.5 W HepburnPage, IA
11:14 UTCTSTM WND GST 730.5 Wnw VilliscaMontgomery, IA
11:15 UTCTSTM WND DMGAtlanticCass, IASeveral reports of trees and power poles down across Atlantic found on social media. Time estimated from radar.
11:15 UTCTSTM WND DMG3 N VilliscaMontgomery, IADelayed report of damaged grain bins blown near the interchange of US-34 and US-71, north of Villisca. Time estimated with radar.
11:18 UTCTSTM WND GST 65GriswoldCass, IAMeasured from personal weather station.
11:20 UTCTSTM WND DMG1 Nw CorningAdams, IATree down on building. Time estimated by radar.
11:24 UTCTSTM WND DMG1 Nne AtlanticCass, IANWS COOPERATIVE WEATHER OBSERVER REPORTS THUNDERSTORM WINDS LIFTED THE STAINLESS STEEL RAIN GAGE OUT OF ITS HOLDER AND TOSSED IT AROUND 30 FT AWAY. TIME ESTIMATED FROM RADAR.
11:24 UTCHAIL 1New MarketTaylor, IADelayed report.
11:27 UTCFLOODClarindaPage, IAReport from mPING: River/Creek overflowing; Cropland/Yard/Basement Flooding.
11:30 UTCTSTM WND DMG3 Wnw AnitaCass, IADelayed report - time estimated by radar. Received photo from trained spotter of tree limb down.
11:30 UTCTSTM WND DMGCorningAdams, IADamage reported in Corning, will further assess source of damage.
11:30 UTCTSTM WND DMGCorningAdams, IAReceived photo of several tree limbs down. Time estimated from radar.
11:30 UTCFLASH FLOODClarindaPage, IADelayed report from the public of several inches of water over roadways through town.
11:31 UTCTSTM WND GST 65ShambaughPage, IA
11:34 UTCHAIL 1ClarindaPage, IAReport from mPING: Quarter (1.00 in.).
11:36 UTCFLASH FLOODEssexPage, IAPublic report of low lying flooding in Essex, Iowa including water in roadways and covering a park. Knee deep water at the intersection of Illinois and Dennison St.
11:45 UTCTSTM WND DMGLenoxTaylor, IADelayed report - time estimated from radar. Damage to machine shed on social media.
11:45 UTCHAIL 1CrestonUnion, IA
11:50 UTCTSTM WND DMG3 Ssw KentAdams, IADelayed report - time estimated from radar. Received report via email of damage to several grain bins.
11:50 UTCTSTM WND DMGCrestonUnion, IADelayed report - time estimated by radar. Received photos of damage via email.
11:50 UTCHAIL 1TingleyRinggold, IADelayed report - time estimated from radar. Photo received via social media.
11:53 UTCTSTM WND GST 701 Sw AdairAdair, IAMeasured from personal weather station.
11:55 UTCTSTM WND DMG1 Se CrestonUnion, IADelayed report - time estimated from radar. Photo from social media with tree branches down across roadway.

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 IowaEvery tornado in Iowa since 1950Warnings in force in Iowa nowThe forecast where you are

The other tornadoes of June 11, 2026

65 more have been surveyed in the United States that day, so far.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
June 115:10 AM CDTEF1Cass, NE2.040
June 115:15 AM CDTEF0Cass, NE0.320
June 115:21 AM CDTEF1Cass, NE2.040
June 115:29 AM CDTEF1Fremont, IA1.530
June 115:33 AM CDTEF0Mills, IA1.720
June 115:58 AM CDTEF1Page, IA7.2100
June 116:08 AM CDTEF1Montgomery, IA5.70
June 116:08 AM CDTEF1Montgomery, IA5.70
June 116:11 AM CDTEF1Page, IA1.950
June 114:05 PM CDTUnratedWashington, IA0.10
June 114:15 PM CDTUnratedHancock, IL0.20
June 114:54 PM CDTUnratedMcDonough, IL0.10
June 114:56 PM CDTEF3Woodford, IL11.2930
June 115:17 PM CDTEF0Fulton, IL2.430
June 115:31 PM CDTUnratedFulton, IL0.220
June 115:31 PM CDTEF1LaSalle, IL4.4500
June 115:32 PM CDTEF3Livingston, IL11.96007
June 115:44 PM CDTEF1Livingston, IL22.8900
June 115:55 PM CDTUnratedLivingston, IL0.8250
June 115:58 PM CDTUnratedLaSalle, IL0.3100
June 116:08 PM CDTEF1Tazewell, IL12.9300
June 116:12 PM CDTEF1Kenosha, WI0.575
June 116:12 PM CDTUnratedBureau, IL1.40
June 117:01 PM CDTUnratedLee, IL6.050
June 117:06 PM CDTEF0McLean, IL11.0100
June 117:08 PM CDTUnratedKankakee, IL0.650
June 117:11 PM CDTEF0Lake, IN6.0150
June 117:20 PM CDTEF1Champaign, IL9.10
June 117:23 PM CDTEF1Ford, IL6.9100
June 117:25 PM CDTEF2Lake, IN6.57001
June 117:26 PM CDTEF1Champaign, IL3.0150
June 117:32 PM CDTEF0Lake, IN4.1150
June 117:36 PM CDTEF0Lake, IN12.7200
June 117:39 PM CDTEF1Vermilion, IL13.6100
June 117:44 PM CDTEF1Vermilion, IL8.1100
June 117:45 PM CDTEF0Iroquois, IL2.1250
June 117:48 PM CDTEF1Iroquois, IL1.250
June 117:48 PM CDTEF3Lake, IN22.5450
June 117:52 PM CDTEF1DuPage, IL3.0400
June 117:58 PM CDTEF0Newton, IN12.6200
June 118:58 PM EDTEF1Benton, IN12.3250
June 117:58 PM CDTEF0Newton, IN15.6200
June 118:59 PM EDTEF0Warren, IN10.575
June 118:04 PM CDTEF0DuPage, IL1.3150
June 118:15 PM CDTEF2Cook, IL8.33506
June 118:23 PM CDTUnratedPorter, IN0.210
June 119:29 PM EDTEF0Barry, MI4.650
June 119:31 PM EDTEF0Kent, MI4.270
June 119:31 PM EDTEF0Carroll, IN3.475
June 119:43 PM EDTEF0Carroll, IN0.325
June 119:46 PM EDTEF1Cass, IN0.8250
June 119:58 PM EDTEF1Cass, IN1.5100
June 1110:11 PM EDTEF1Marshall, IN0.7125
June 1110:11 PM EDTEF0Marshall, IN2.9125
June 1110:22 PM EDTEF1Wabash, IN4.702
June 1110:22 PM EDTEF1Marshall, IN3.4300
June 1110:33 PM EDTEF1Huntington, IN5.875
June 1110:39 PM EDTEF1Huntington, IN7.950
June 1110:42 PM EDTEF2Elkhart, IN6.11001
June 1110:44 PM EDTEF1Huntington, IN0.725

All 66 of them

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.