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The tornado was rated as a high-end EF3 with wind speeds estimated at 155 mph (249 km/h), reaching a peak width of 1,300 yards (1,200 m) along a 34.64-mile (55.75 km) path, remaining on the ground for 38 minutes. [11] As this tornado was ongoing, a separate circulation spawned the violent Greenfield tornado. [12]
After exiting Greenfield, this tornado moved east-northeastward, weakened, and dissipated over open terrain as the other tornado became the dominant circulation within the supercell. [ 82 ] The tornado was on the ground for 48 minutes, traveled 43.07 mi (69.31 km), and had a peak width of 1,600 yd (1.5 km).
At least four people were killed and 35 injured by an EF4 tornado that plowed through the center of Greenfield, Iowa, on Tuesday. Peak winds of 185 mph were estimated by the National Weather ...
Iowa: Greenfield: 5 (35 injuries) NWS: 2024 Greenfield tornado — This long-tracked tornado moved through three other counties before destroying several homes at low-end EF4 intensity in rural Adair County. The most severe damage occurred in Greenfield in the central part of the county, where the tornado peaked at mid-range EF4 intensity.
The National Weather Service said initial surveys indicated at least an EF-3 tornado in Greenfield, but additional damage assessment could lead to a more powerful ranking. The tornado appeared to have been on the ground for more than 40 miles (64 kilometers), AccuWeather Chief Meteorologist Jon Porter said.
National Weather Service teams are conducting surveys Wednesday after tornadoes hit Iowa. An initial survey showed at least EF3 damage in Greenfield.
December 2021 produced 63 tornadoes, which is the Iowa single-month record. A widespread derecho tore across Iowa in December 2021, ... while the longest tornado was in Greenfield at 42.4 miles.
This strong tornado formed on the east side of Greenfield as the main EF4 Greenfield tornado was entering the town and moves northeastward. It caused significant damage on farmsteads along its path, damaging outbuildings and tree groves. It also toppled a wind turbine, and completely destroyed an outbuilding and shredded trees at EF2 intensity.