EF0 tornado, Tindall to Lindley, Missouri, June 24, 2021

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

EF0

Date

June 24, 2021

Touchdown

9:13 PM CDT (02:13 UTC)

Lifted

9:15 PM CDT (02:15 UTC)

On the ground

2 minutes

Path length

1.7 miles (2.7 km)

Path width

25 yards (23 m)

Deaths

0

Injuries

0

County

Grundy County

Touchdown point

40.157, -93.605

Lift-off point

40.161, -93.573

Record number

2106242013-01

10 damage points were recorded along this path by NWS EAX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 90 mph.

• First QLCS tornado of at least three in this area. Damage point obtained from Grundy County emergency management.
• Second QLCS tornado of at least three in this area. Damage point obtained from Grundy County emergency management.
• Second QLCS tornado of at least three in this area. Damage point obtained from Grundy County emergency management. A large barn was heavily damaged and two grain bins were caved in.
• At the point on SE 120th where it crossed into Sullivan County an older pole barn lost a chunk of roof and the land owner reported several support poles were pulled out of the ground.

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

Late in the afternoon, and through the evening hours on June 24 a cluster of storms over southeast Nebraska congealed into a line of thunderstorms that focused across northern Missouri. Most notably within this line of storms was a cluster of QLCS tornadoes that formed in Grundy County. There may have been other tornadoes associated with circulations that were noted on radar, but emergency management confirmed damage consistent with tornadoes near Trenton and Laredo Missouri. Most of the damage was minor, but some grain bins being blown off their foundation was the highlight of the damage in the area. Rainfall was the other big story with this event as some areas received 6 to 10 inches of rain. Despite the excessive rain, the flash flooding was rather minor, however there were still numerous roads closed, and areas near Excelsior Springs were especially hard hit as the Fishing River rose out of its banks. Another semi-dramatic event occurred along I-29 just north of St. Joseph, where a crane that was being used to do road construction became unbalanced and tipped.

An embedded QLCS tornado moved through rural parts of Grundy County. The bulk of the damage as powerlines and trees, with minor structure damage.

A QLCS tornado formed within a squall line that moved through Grundy County. Most of the damage was relegated to trees, powerlines, and some minor structure damage in the area.

Another QLCS tornado formed within a squall line across Grundy County. Local emergency management conducted the survey and came across several barns heavily damaged along the path, with the most significant damage coming near JJ and E, where two grain bins were caved in and moved off their foundation.

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

0 minutes of warning. NWS EAX issued a tornado warning for this county at 02:13 UTC, 0 minutes before the tornado touched down, in force until 02:30 UTC.

The county was under a severe thunderstorm watch, issued at 01:57 UTC and running to 04:47 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 Enhanced Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 01:06 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.

Chillicothe (CDJ), 37 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Pleasant Hill radar (KEAX), 161 km away, was scanning. The volume nearest the touchdown began at 02:15 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 2021 tornado in MissouriEvery tornado in Missouri since 1950Warnings in force in Missouri nowThe forecast where you are

8 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.