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On December 15, 2021, a rapidly-deepening low-pressure area contributed to a historic expanse of inclement weather across the Great Plains and Midwestern United States, resulting in an unprecedented [5] December derecho and tornado outbreak across portions of the Northern United States, a region normally affected by snow and cold weather during this time of year.
This page documents all tornadoes confirmed by various weather forecast offices of the National Weather Service in the United States in December 2021. In December, tornadoes are most likely in the southern states due to their proximity to the unstable airmass and warm waters of the Gulf of Mexico, with only occasional incursions farther north. [1]
December 2021 Midwest derecho and tornado outbreak; G. 2024 Greenfield tornado; I. Iowa tornado outbreak of July 2018; L. List of tornadoes in the outbreak of April ...
In 2021, Iowa experienced 114 tornadoes. Database: See the tornadoes in Iowa since 1950. How fast can tornadoes travel? A typical tornado travels at around 10-20 miles per hour, according to NOAA ...
The 49 tornadoes in both May and April are tied for the third most tornadoes in a single month in Iowa's history. December 2021 produced 63 tornadoes, which is the Iowa single-month record.
A large area from central Iowa to north central Illinois saw wind gusts of 70-80 mph, with gusts of more than 100 mph in a few areas. Paris Barraza is a trending and general assignment reporter at ...
The tornado outbreak set a new record for the most tornadoes to hit Iowa in a single day with 61, far exceeding the previous record of 35 tornadoes set on August 31, 2014. Additionally, 21 of the tornadoes in Iowa were rated EF2 which beat the previous record of 16 EF2/F2 or greater tornadoes set on June 7, 1984 .
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin — a high-end classification of tornado warning — sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ground ...