Tuscaloosa tornado, 27 April 2011Photo: Henry W · Source. WebP conversion; aspect ratio preserved.- Location
- Tuscaloosa to northern Birmingham
- Official rating
- EF4 Damage-based rating
- Local time · 27 April 2011
- 4:43–6:14 pm CDT (UTC−5)
- UTC
- 21:43–23:14 UTC · 27 April
- Time on the ground
- 1 hour 31 minutes
- Track length
- 80.68 mi / 129.8 km
- Maximum width
- 2,600 yd / 2.38 km
- Survey wind estimate
- 190 mph / 306 km/h
Event & radar context
A long-track tornado during the 27 April Super Outbreak. The KBMX archive has an approximately 13-minute gap in this sequence. The viewer jumps between actual observations and does not fill that gap. RhoHV is unavailable in these scans.
Interpreting the rating
F, EF and IF are different damage-rating scales. Original source labels are preserved. Badge colours group the numerical categories for browsing; they do not imply identical wind thresholds. Radar products do not directly establish the damage rating.
Event facts: National Weather Service review ↗