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NWS Storm Damage Summaries

Dec 10-11, 2021 Tornado Outbreak


December 21, 2021 - A strong storm system moving across the central and southern United States resulted in widespread severe weather across the region on December 10 and 11. The National Weather Service (NWS) confirmed 66 tornadoes as of today (see list below), and several long track tornadoes. The storms travelled from Arkansas towards the Great Lakes. The most significant damage occurred in Arkansas, Tennessee, Missouri and Kentucky. Eight states reported tornadoes during the event. The NWS received nearly 400 reports of large hail, damaging winds and tornadoes across the area.

NWS Storm Prediction Center continuously monitored the potential for severe weather several days in advance of the event and issued outlooks highlighting the area of concern three days before the storms developed. On the morning of the event, the Storm Prediction Center upgraded the outlook to a Moderate Risk and called for “strong tornadoes” several hours before the worst thunderstorms formed.

NWS forecasts and watches continued through the day of the event, and warnings were issued with lead times well above average and sent out through NOAA Weather Radio, Wireless Emergency Alerts (WEA), the Emergency Alert System, the Emergency Managers Weather Information Network, NOAA Weather Wire Service, and National Weather Service social media accounts.

One of the more extraordinary aspects of this severe weather event was the long-lived nature of the tornado-producing thunderstorms. In particular, two supercell thunderstorms each traveled well over 100 miles, producing tornadoes along the way, before dissipating well after dark.

A satellite loop showing the complex of thunderstorms and lightning that produced the tornadoes across Missouri, Illinois, Tennessee, Arkansas, and Kentucky. and

NOAA's GOES16 Satellite tracked the fast-moving severe thunderstorms that produced the devastating tornadoes during the evening and overnight hours of December 10-11, 2021.


City County State EF Rating Est Wind Speed Path Length (Miles)
City County State EF Rating Est Wind Speed Path Length (Miles)
List of surveyed tornadoes from December 10-11, 2021
Download JSON


This is a composite image of NWS radar taken every 15-20 minutes showing the track of the supercell thunderstorms that traversed well over 100 miles in Kentucky and impacted communities such as Mayfield and Dawson Springs along the way.


The tornadoes collapsed an occupied candle factory in Mayfield, Kentucky, an Amazon warehouse near Edwardsville, Illinois, and a nursing home in Monette, Arkansas.

After the storm, the NWS began conducting storm damage surveys. The eight surveys, below, include tornado track paths, photographs, radar imagery, and storm reports from the damage that has been examined up to this point. The data presented is preliminary and subject to change as new information becomes available.