Event narrative (NOAA)
This was the deadliest tornado in Montana since 1923, and only the fourth EF-3 on record. The supercell thunderstorm developed strong rotation, and rotating wall clouds and brief funnel clouds were reported in Daniels County. As the storm moved southeast, it intensified and a large, long-lived tornado formed. The tornado traveled for 18 miles, mostly through rural areas, but it had devastating impacts as it hit a ranch, killing two people and injuring one. On the morning of July 27th, 2010 two teams of NWS Glasgow staff surveyed the damage area. The first team started in Daniels County and followed the track of the storm to the east-southeast. The second team met with county and state officials at the site of the ranch that was most devastated. Both teams spoke to law enforcement
Other notable tornado events in Montana
Source: NOAA/NCEI Storm Events Database. Deaths and injuries are those NOAA classifies as direct. Damage is the reporting office's estimate at the time and is not inflation-adjusted. This is a catalogue record, not a forecast.