EF2 tornado, Aaron Arpt to Hampton, Nebraska, May 29, 2008

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.

Rating

EF2

Date

May 29, 2008

Touchdown

7:02 PM CDT (00:02 UTC)

Lifted

7:13 PM CDT (00:13 UTC)

On the ground

11 minutes

Path length

7.6 miles (12.2 km)

Path width

1,000 yards (914 m)

Deaths

0

Injuries

0

Property damage

$20,000

Crop damage

$100,000

County

Hamilton County

Touchdown point

40.855, -98.037

Lift-off point

40.872, -97.893

Record number

0805291802-01

A significant severe weather outbreak occurred during the late afternoon and evening of May 29th. Several tornadoes were reported from near Elwood to north of York. Two tornadoes caused damage in the city of Kearney and one occurred just to the south of town. Another tornado damaged homes and power poles near Aurora. Another tornado started in north-central Kansas and entered south-central Nebraska near Hubbell. Very strong winds moved down a portion of Interstate 80 and pushed cars and trucks off of the roadway near Aurora. Other areas of south-central Nebraska received heavy rains and hail. Hail to the size of baseballs was reported near Arapahoe in Furnas County. These storms also produce a lot of rainfall over areas that had fairly wet ground. Several areas of flooding were noted in the Platte and Republican River valleys.

This tornado started southwest of Aurora and moved southeast. The parent supercell had produced a rear flank downdraft (RFD) that was traveling down Interstate 80. As the tornado interacted with this RFD about a mile north of the Interstate, it rapidly increased in size and strength and started to move eastward. At this point the tornado damaged several homes and brought down a self standing cell tower. One home along Highway 14 sustained considerable damage. The tornado then moved to the northeast and dissipated just southwest of the village of Hampton. To the west of Hampton, several empty rail cars were blown off the tracks by what appeared to be inflow winds into the tornado. A major high voltage power line was brought down by the tornado as well as many power lines and poles in the rural areas. Also many center pivot irrigation systems were blown over along the tornadoes path.

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

27 minutes of warning. NWS GID issued a tornado warning for this county at 23:35 UTC, 27 minutes before the tornado touched down, in force until 00:15 UTC.

The county was under a tornado watch, issued at 19:33 UTC and running to 03:00 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 High Risk, with a 0.30 chance of a tornado within 25 miles, in the hatched area where significant tornadoes were expected. The outlook in force was issued at 19:56 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.

Aurora (AUH), 4 km from the path, in the two hours either side.

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

The Grand Island radar (KUEX), 73 km away, was scanning. The volume nearest the touchdown began at 00:02 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 2008 tornado in NebraskaEvery tornado in Nebraska since 1950Warnings in force in Nebraska nowThe forecast where you are

37 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.