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EF3 tornado in Hamilton County, Tennessee

Tornado April 12, 2020 · Hamilton County, Tennessee

EF3
Rating
19.3 mi
Whole path
1,500 yd
Path width
2
Deaths
18
Injuries
$250K
Damage as recorded

NOAA records this tornado county by county. Its path ran through Catoosa County, Georgia → Hamilton County → Bradley County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 1,500 yards (0.85 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF3 means. On the Enhanced Fujita scale, EF3 is severe damage: whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, consistent with estimated gusts of 136–165 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

Ground surveys and radar data suggest the tornado touched down on the south side of Fort Oglethorpe, near the Chickamauga Battlefield Visitor Center in Catoosa County. The tornado crossed I-75 along Scruggs Road, then crossed the Tennessee/Georgia state-line somewhere between Scruggs Road and GA-Hwy 41 (Ringgold Rd in Tennessee). It quickly moved across the Harris Hills area where some trees were uprooted and then continued towards East Brainerd Road and Stratman Circle where an auto parts store was completely leveled and nearby structures had significant roof damage done. The tornado then struck the end of a large shopping building where a restaurant was located. The restaurant facade was destroyed and the roof was peeled back. This is where the tornado picked up strength and was near its peak intensity. It continued northeast into the Drake Forest neighborhood where extensive structure, roof, and tree damage was noted. There were likely pockets of EF-3 damage here, as well. The tornado damage path really widened as it moved northeast into the Holly Hills neighborhood. This was likely the widest part of the tornado. Nearly as far as you could see to the southeast, tree trunks were snapped and significant home damage was noted. Some areas were blocked by tree debris and fallen power poles as well as large debris removal machinery which limited easy access to some areas. Additional damage was found in Ooltewah near the Summit Softball Complex and particularly significant roof damage to several units/buildings of the Integra Hills Preserve Apartments. The tornado weakened as it crossed South Lee Highway and eventually dissipated in southwestern Bradley County.

The wider storm

A prolonged convective event with deep moist southerly flow in an unstable environment with strong wind shear generated supercell thunderstorms across Southeast Tennessee and Southwest North Carolina. The lengthy period of heavy rain resulted in widespread three to four inch rainfall totals across East Tennessee, Southwest North Carolina, and Southwest Virginia.

Began near East Ridge (34.9860, -85.1907).

Other tornadoes from the same storm system

1 more tornado the National Weather Service filed under this storm episode.

Source: NOAA Storm Events Database, event 876337. Narratives are written by the National Weather Service forecast office that issued the report.

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