EF0 tornado, Seymour Owen Fld Arp, Missouri, June 26, 2026

1. EF065 to 85 mphthis tornado

   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 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.

Rating, as surveyed

EF0, preliminary

Date

June 26, 2026

Touchdown

6:52 PM CDT (23:52 UTC)

Lifted

6:58 PM CDT (23:58 UTC)

On the ground

6 minutes

Path length

1.5 miles (2.4 km)

Path width

75 yards (69 m)

Deaths

0

Injuries

0

County

Webster County

Touchdown point

37.208, -92.761

Lift-off point

37.228, -92.751

Highest wind the damage implies

80 mph

Surveyed by

NWS SGF

The office's name for it

Mountain Dale

Survey last edited

June 28, 2026

Record number

None yet. SPC numbers 2026 in the spring of 2027.

A National Weather Service ground survey determined that an EF-0 tornado with estimated peak winds of 80 mph occurred 2 miles north of Mountain Dale, or 4 miles north of Seymour. Both video of the tornado and the ground survey revealed an intermittent 75 yard wide path of mostly tree damage, lasting for 6 minutes and traveling one and a half miles. The most substantial damage was a tin roof blown off a barn. Track extensions are still possible with satellite data analysis.

Written by NWS SGF in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.

8 damage points were recorded along this path by NWS SGF, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 93 mph.

• Very narrow path of shredded trees. Trunks snapped about a third of the way up.
• 50 to 75 yard wide path of tree branches thrown around
• Visible extent of narrow tree damage path.
• Visible extent of narrow tree damage path. End point.

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

Several rounds of thunderstorms occurred during the period of June 25th and June 27th as a frontal boundary remained near the area. Some areas received 3-6 inches of rainfall over a short period of time. Thunderstorms produced a few tornadoes on the evening of June 26th.

A National Weather Service ground survey determined that an EF-0 tornado with estimated peak winds of 80 mph occurred 2 miles north of Mountain Dale, or 4 miles north of Seymour. Both video of the tornado and the ground survey revealed an intermittent 75 yard wide path of mostly tree damage, lasting for 6 minutes and traveling one and a half miles. The most substantial damage was a tin roof blown off a barn. Track extensions are still possible with satellite data analysis.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

The county was under a severe thunderstorm watch, issued at 22:58 UTC and running to 02:51 UTC.

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 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 20:00 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 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.

The Springfield radar (KSGF), 57 km away, was scanning. The volume nearest the touchdown began at 23:51 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.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2026 tornado in MissouriEvery tornado in Missouri since 1950Warnings in force in Missouri nowThe forecast where you are

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

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.

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.