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April 12, 2020 · Blount County · 2020
EF1

April 12, 2020

5:04 PM
Blount County, Alabama · Near Oneonta (ZIP 35121)
Fatalities
0
Injuries
0
Path Length
0.8 mi
Max Width
115 yd
DateApril 12, 2020
Time5:04 PM
CountyBlount
CityOneonta
Property Loss$0
Crop Loss$0
SourceNCEI 887605
NWS Birmingham

3 NNE Brooksville - 1.4 WNW Hyatt A tornado track was identified from far northern Blount County into southern Marshall County . A tornado track was identified from far northern Blount County into southern Marshall County . The tornado touched down in far northeast Blount County and crossed the Marshall County line about one mile west-southwest of Meadowbrook Drive. The tornado tracked approximately three miles crossing Alabama Highway 79 South, where dozens of trees were uprooted and a couple of homes sustained minor roof damage. The tornado continued to the east-northeast uprooting several more trees before lifting along Foster Road. Start: 34.2210/-86.4590 End: 34.2253/-86.4254

NWS EF Scale: F1

Event Narrative

National Weather Service meteorologists surveyed damage in southern Blount County and determined that it was consistent with an EF0 tornado, with maximum winds near 75 mph.||A tornado touched down near Whites Creek, generally along Center Springs Road. Numerous trees were snapped and uprooted before the tornado moved east causing minor roof damage to at least two homes, uprooting trees, and destroying a storage shed. The tornado quickly weakened and lifted as it moved over a heavily wooded area just to the east-northeast where remnant debris lied in the tree line. Aerial photos helped establish a clearly identifiable convergent debris pattern.

Episode Narrative

An upper-level low over the southwest United States evolved into a negatively-tilted shortwave trough as it moved over the southeastern United States. A warm front steadily moved northward during the morning and afternoon hours on Sunday, April 12. This allowed an unstable air mass to move northward and overspread much of the region. At the same time, very strong wind shear developed over Alabama as the upper trough neared the state.||An initial wave of severe storms affected areas near and north of Interstate 20, involving tornadoes, damaging straight-line winds, and some hail. Through the evening, a second wave of thunderstorms affected the remaining areas of Central Alabama with tornadoes and damaging straight-line winds. Flooding also resulted from training rainfall near and north of Interstate 20. Some roads became impassible or were washed out. This weather event was large in scope and produced severe weather from Oklahoma and Texas, through the southeastern United States, then up the east coast to New York.

Outbreak Context

Part of 27-tornado outbreak on April 12, 2020

Shared Episode Narrative

An upper-level low over the southwest United States evolved into a negatively-tilted shortwave trough as it moved over the southeastern United States. A warm front steadily moved northward during the morning and afternoon hours on Sunday, April 12. This allowed an unstable air mass to move northward and overspread much of the region. At the same time, very strong wind shear developed over Alabama as the upper trough neared the state.||An initial wave of severe storms affected areas near and north of Interstate 20, involving tornadoes, damaging straight-line winds, and some hail. Through the evening, a second wave of thunderstorms affected the remaining areas of Central Alabama with tornadoes and damaging straight-line winds. Flooding also resulted from training rainfall near and north of Interstate 20. Some roads became impassible or were washed out. This weather event was large in scope and produced severe weather from Oklahoma and Texas, through the southeastern United States, then up the east coast to New York.

Source Data
NCEI Event ID: 887605

See Also

0.8 mi115 yd wide