EF1 tornado, Tarnov to Howells, Nebraska, May 24, 2024

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.

Rating

EF1

Date

May 24, 2024

Touchdown

1:08 AM CDT (06:08 UTC)

Lifted

1:23 AM CDT (06:23 UTC)

On the ground

15 minutes

Path length

11.8 miles (19.0 km)

Path width

700 yards (640 m)

Deaths

0

Injuries

0

Counties

Platte and Colfax counties

Touchdown point

41.615, -97.444

Lift-off point

41.613, -97.216

Record number

2405240008-01

44 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 110 mph.

• Center pivot down, first point
• Grain bin dented. Also, center pivot across road flipped
• three power poles taken out
• Five more broken poles, northern edge.

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

Upper-air analysis showed a trough over the northern Rockies the evening of May 23rd. That night, this trough ejected out into the central and northern Great Plains. At the surface, a low-pressure developed in western South Dakota. Extending south and southwest of this surface low into Colorado was a cold front. A secondary low-pressure center was noted in northwestern Kansas where the surface cold front intersected a dry line that extended south into western Texas. |Shortly after midnight, a line of severe thunderstorms along this cold front moved into the OAX CWA. From 05 UTC through 10 UTC, this line of storms brought widespread severe wind gusts up to 110 miles per hour and 17 spin-up tornadoes across eastern Nebraska and western Iowa. These storms continued to be severe and tornadic through the morning of the 24th, later being classified as a derecho. |Troughing over the western CONUS continued to bring southwesterly flow aloft the region even behind this first trough. By the evening of the 25th, another shortwave trough had amplified over the Great Basin and had shifted over the Rocky Mountains. Ahead of this disturbance, a low-pressure developed in northwest Kansas, with a warm front extending east-southeast across northern and eastern Kansas. The evening of the 25th, scattered strong to severe thunderstorms developed across this frontal zone in northern Kansas and generally tracked to the east-northeast. As such, scattered thunderstorms moved into southeast Nebraska after 9 PM CDT. While largely remaining below severe limits, severe straight-line winds were observed along the south and east side of the Omaha metro as a thunderstorm tracked from western Otoe into eastern Pottawattamie County. It was estimated wind gusts reached as high as 70 miles per hour with this storm, with power outages being reported due to the winds.

This tornado developed about 3 miles east of Tarnov, knocking over center pivots and grain storage bins as it crossed agricultural fields. The tornado continued moving east across Platte County, damaging the outbuildings of a goat farm, and producing high-end EF-0 damage. The tornado moved east to damage the farmhouse, outbuildings and trees of another goat farm, producing EF-1 damage. The tornado then moved slightly north of east tracking into Colfax County. Peak winds during this segment of the tornado track were estimated to be 100 miles per hour. The maximum path width for this segment was measured to be 700 yards, with an average width estimated at 200 yards.

A tornado tracked from the north side of the Columbus airport, across open fields to the east. Several wooden power poles were snapped along 3rd Avenue. Winds north of the track were out of the NW and winds at the Columbus AWOS, south of the track, were out of the SSW. Peak estimated winds for this tornado were 100 miles per hour. The max path width was measured at 50 yards, with an average width estimated to be 50 yards as well.

This is a continuation of the EF-1 tornado from Platte County. After moving into Colfax County, the roof of a large livestock barn was damaged, producing EF-1 damage. The tornado dissipated in an agricultural field about 5.5 miles southeast of Leigh. The peak winds and width of the tornado in this segment were 107 miles per hour and 250 yards respectively. The average width was estimated to be 100 yards for this segment as well.

This tornado developed 3 miles southwest of Howells, where it damaged a grain bin and flipped a center pivot. It moved northeast across agricultural fields between County Road T and County Road U. As it crossed County Road 14 it snapped several wood power poles. The tornado continued tracking northeast crossing near the intersection of County Road 15 and County Road V, about 1.5 miles southeast of Howells. The tornado's width varied from from one-tenth to one-third of mile along its track. Straight line wind damage from the descending rear inflow jet was found south of the track. Peak estimated winds for this tornado were at 100 miles per hour. The maximum width was measured at 400 yards, with an average width estimated at 150 yards.

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

2 minutes of warning. NWS OAX issued a tornado warning for this county at 06:06 UTC, 2 minutes before the tornado touched down, in force until 06:30 UTC.

The county was under a severe thunderstorm watch, issued at 01:43 UTC and running to 07:04 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 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 Omaha radar (KOAX), 87 km away, was scanning. The volume nearest the touchdown began at 06:08 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 2024 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are

42 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.