← Back to Dashboard
March 17, 2021 · Marengo County · 2021
EF0

March 17, 2021

1:03 PM
Marengo County, Alabama · Near Demopolis (ZIP 36732)
Fatalities
0
Injuries
0
Path Length
0.8 mi
Max Width
175 yd
DateMarch 17, 2021
Time1:03 PM
CountyMarengo
CityDemopolis
Property Loss$0
Crop Loss$0
SourceNCEI 944900
NWS Birmingham

Sweetwater - 1 N Sweetwater The tornado began near 3rd Avenue in Sweet Water and proceeded north crossing Highway 10. The tornado continued north of Sweet Water, dissipating near Beaver Creek Road. Damage mainly consisted of broken large tree branches. This was the second tornado near Sweet Water that afternoon. The tornado damage path was 1.75 miles long and was 75 yards wide. The maximum winds were estimated around 65 mph. Start: 32.0921/-87.8699 End: 32.1171/-87.8646

NWS EF Scale: F0

Event Narrative

National Weather Service meteorologists surveyed damage in southern Marengo County and determined that it was consistent with an EF1 tornado, with maximum winds near 90 mph. A tornado touched down south of the town of Sweet Water along County Road 6. It continued northeastward and reached its maximum intensity along County Road 7. The tornado dissipated as it crossed Highway 10 just southeast of Sweet Water. Damage was limited to numerous snapped trees.

Episode Narrative

An active southern jet stream set-up across the southern United States during the middle of March. Several short-wave troughs became negatively tilted as each one traversed across Texas and towards Alabama. This resulted in a single hail event one Monday, March 15, and significant tornado outbreak on Wednesday, March 17. Many supercells began to develop across Central Alabama by midday Wednesday and continued into the evening hours before a squall line moved through the state. Sufficient instability and strong wind shear produced conditions favorable for tornadoes to develop. The event consisted of twenty-one tornadoes in the NWS Birmingham forecast area.

Outbreak Context

Part of 21-tornado outbreak on March 17, 2021

Shared Episode Narrative

An active southern jet stream set-up across the southern United States during the middle of March. Several short-wave troughs became negatively tilted as each one traversed across Texas and towards Alabama. This resulted in a single hail event one Monday, March 15, and significant tornado outbreak on Wednesday, March 17. Many supercells began to develop across Central Alabama by midday Wednesday and continued into the evening hours before a squall line moved through the state. Sufficient instability and strong wind shear produced conditions favorable for tornadoes to develop. The event consisted of twenty-one tornadoes in the NWS Birmingham forecast area.

Source Data
NCEI Event ID: 944900

See Also

0.8 mi175 yd wide