EF2 Tornado — Marengo, Alabama
2011-04-15 · near Linden Muni Arpt, Marengo, Alabama
Event narrative
A tornado touched down in Marengo County, just west of County Road 39, southwest of the community of Half Chance. The tornado moved northeast where it snapped and uprooted dozens of trees along its path. As the tornado moved into Dayton, it strengthened to an EF-2, with maximum winds of 125 mph. Several homes sustained significant roof damage. The tornado lifted 1 mile northeast of Dayton along State Highway 25.
Wider weather episode
A potent storm system, which wreaked havoc across the eastern half of the United States on April 14-16, produced a significant and historic tornado outbreak across Central Alabama on April 15. Forty tornadoes, 30 of which touched down in Central Alabama, occurred in the state. At the time, this set a new record for number of tornadoes within the state from one event. This record was broken on April 27, 2011.
A surface low developed across the Central Plains on Thursday, April 14, and strengthened as it moved into the mid-Mississippi River Valley. In response, surface dew points in the middle to upper 60s surged northward into Central Alabama and deep vertical wind shear increased, providing support for tornadic supercell development. A weakening line of thunderstorms moved into northwest Central Alabama early Friday morning. The southern end of this line intensified by mid day as it encountered a more unstable airmass. South of the line, supercells formed in Mississippi and tracked eastward into west Central Alabama. The entire system pushed east across the area over the course of about twelve hours, exiting east Central Alabama in the early morning hours on Saturday, April 16. In addition to the thirty tornadoes, the storm system produced widespread straight line wind damage and numerous large hail reports.
View location on OpenStreetMap → (32.2884, -87.7380)
Source: NOAA Storm Events Database, event_id 310525. Narrative written by the NWS forecast office that issued the report.