There are areas which people believe to be protected from tornadoes, whether by being in a city, near a major river, hill, or mountain, or even protected by supernatural forces. [129] Tornadoes have been known to cross major rivers, climb mountains, [130] affect valleys, and have damaged several city centers. As a general rule, no area is safe from tornadoes, though some areas are more susceptible than others. [26] [124] [125] Ongoing research A Doppler on Wheels unit observing a tornado near Attica, Kansas

A tornado was caught on video over farmland; no damage was observed. This tornado was the first produced by the Quad-State supercell. [32]In South Dakota, Sioux Falls issued a snow alert. The Lincoln County Sheriff's Office issued a no-travel alert. Several highways, including Interstate 229 and Interstate 90 were snow-covered. [177] Numerous school districts around the area cancelled classes on December 10. [178]

Arkansas Event Report: EF1 Tornado (Report). National Centers for Environmental Information. National Weather Service in Memphis, Tennessee. 2021 . Retrieved March 19, 2022.A strong tornado severely damaged the roofs and exterior walls of several homes, including some that were shifted off of their foundations. Less intense damage to trees and power poles occurred in and around Burns before tornado dissipated. Two people were injured. [79] Research programs, including field projects such as the VORTEX projects (Verification of the Origins of Rotation in Tornadoes Experiment), deployment of TOTO (the TOtable Tornado Observatory), Doppler on Wheels (DOW), and dozens of other programs, hope to solve many questions that still plague meteorologists. [47] Universities, government agencies such as the National Severe Storms Laboratory, private-sector meteorologists, and the National Center for Atmospheric Research are some of the organizations very active in research; with various sources of funding, both private and public, a chief entity being the National Science Foundation. [112] [139] The pace of research is partly constrained by the number of observations that can be taken; gaps in information about the wind, pressure, and moisture content throughout the local atmosphere; and the computing power available for simulation. [140] Spotters usually are trained by the NWS on behalf of their respective organizations, and report to them. The organizations activate public warning systems such as sirens and the Emergency Alert System (EAS), and they forward the report to the NWS. [107] Dylan Moriarty; Bonnie Berkowitz; Zach Levitt (December 11, 2021). "Deadly path: How tornadoes ripped through states". The Washington Post. Archived from the original on December 11, 2021 . Retrieved December 12, 2021. A business, a home, and nearby outbuildings sustained extensive damage. Debris from the outbuildings were blown 0.7 miles (1.1km) away. Multiple trees were snapped as well. [74]