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EF1 tornado in Shelby County, Alabama

Tornado March 25, 2021 · Shelby County, Alabama

EF1
Rating
79.7 mi
Whole path
1,800 yd
Path width
13
Injuries

NOAA records this tornado county by county. Its path ran through Hale County → Perry County → Bibb County → Chilton County → Shelby County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 1,800 yards (1.02 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

National Weather Service meteorologists surveyed damage in southeast Shelby County and determined that it was consistent with an EF1 tornado, with maximum winds near 110 mph. A strong, long-track tornado traveled across Hale, Perry, Bibb, Chilton, and Shelby Counties during the afternoon of March 25, 2021. It is estimated that the tornado had a 98 minute life span, with a path length of 80 miles.

The tornado crossed into Shelby County from Bibb County near the intersection of County Road 201 and 128. The tornado moved into the city of Calera, uprooting trees and blowing over an unanchored mobile home along County Road 67. The tornado then crossed Interstate 65 and moved into a large neighborhood along and northeast of Timberline Drive. The majority of structural damage was confined to loss of shingle and siding. However, at least 3 homes had portions of their roofs removed, 2 of them with significant loss. Next, mostly rural areas were hit between the cities of Columbiana and Calera, south of Highway 70. The last area of notable damage was in Columbiana. Numerous trees were uprooted from Mooney Road to Mardis Ferry Road and numerous homes were heavily damaged by fallen trees. Several mobile homes were impacted near the intersection of Alston Farm Road and Mardis Ferry Road. Most sustained roofing damage or were crushed by fallen trees. One unanchored mobile home was destroyed with 2 injuries that required hospitalization. Other structures were damaged along the path as well. The tornado then quickly weakened, and dissipated as it approached Highway 25 after crossing County Road 7.

The wider storm

A potent storm system affected Central Alabama on Thursday, March 25th. A highly-sheared environment combined with increasing instability produced numerous tornadic thunderstorms. Severe parameters were supportive of significant and long-track supercells, prompting the issuance of a rare High Risk Convective Outlook from the Storm Prediction Center for portions of Central Alabama.

A total of 10 tornado tracks were surveyed in Central Alabama. This included 4 EF3 tornadoes, 3 EF2 tornadoes, and 3 EF1 tornadoes. Damage was significant along the paths of the most intense tornadoes and, unfortunately, injuries and fatalities occurred.

Some storms were cyclic, meaning multiple tornadoes were produced by the same storm. The most impressive tornado of the event was the long-track tornado that traveled nearly 80 miles from Hale County to Shelby County. This ranked as the seventh longest single tornado track in the state of Alabama.

Began near Roberta (33.0690, -86.7860).

Other tornadoes from the same storm system

9 more tornadoes the National Weather Service filed under this storm episode.

Source: NOAA Storm Events Database, event 948226. Narratives are written by the National Weather Service forecast office that issued the report.

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