EF1 tornado, Lamar to (Iml)Imperial Arpt, Nebraska, May 27, 2019

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 27, 2019

Touchdown

7:23 PM MDT (01:23 UTC)

Lifted

7:35 PM MDT (01:35 UTC)

On the ground

12 minutes

Path length

5.5 miles (8.9 km)

Path width

250 yards (229 m)

Deaths

0

Injuries

0

Property damage

$200,000

County

Chase County

Touchdown point

40.590, -101.730

Lift-off point

40.665, -101.695

Record number

1905271923-01

2 damage points were recorded along this path by NWS LBF, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 100 mph.

• Brief touch down for 30 seconds in a harvested field.
• Brief touch down with irrigation pivot system destroyed , where main piping 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.

A stalled out frontal boundary draped from southern Nebraska into northeastern Colorado served as the focal point for thunderstorms. Thunderstorms initiated over northeastern Colorado and became severe as they tracked east into southwestern Nebraska. Large hail and a tornado were reported with these severe storms. Urban and small stream flooding impacted local communities as storm drains were overwhelmed.

Rope tornado briefly touched down in an open field with no damage reported.

The tornado touched down 7 miles northwest of Imperial and moved northeast 10 miles before dissipating northeast of Imperial. The tornado was intermittently on the ground, where it overturned or destroyed several center pivot irrigation systems in its path. The tornado was rated an EF1.

Tornado briefly touched down, overturning a center pivot irrigation system.

Brief touchdown with a center pivot irrigation system overturned.

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

9 minutes of warning. NWS LBF issued a tornado warning for this county at 01:14 UTC, 9 minutes before the tornado touched down, in force until 02:00 UTC.

The county was under a severe thunderstorm watch, issued at 22:27 UTC and running to 07:00 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 01:18 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 Goodland radar (KGLD), 140 km away, was scanning. The volume nearest the touchdown began at 01:23 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 2019 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are

62 more were confirmed in the United States that day.

All 63 of them

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.