Tornado: Widest Tornado (maximum diameter)
| Record Value | Nearly 4000m (2.5mi) in width |
|---|---|
| Date of Event | 22/5/2004 |
| Length of Record | 1950-present |
| Geospatial Location | Hallam, Nebraska [40°34'N, 96°47'W, elevation: 451m (1480ft)] |
Reference
http://www.crh.noaa.gov/oax/archive/hallam/hallam.php
Discussion
Peak width of nearly two and a half miles was surveyed by National Weather Service Forecast Office, Omaha/Valley, Nebraska
Additional Images

GOES12 Satellite image, 23/5/2003
Track of Hallam's tornado

Regional satellite overhead view of Hallam, Nebraska region