This Spring 2021 severe thunderstorm warnings will be issued with Base, Considerable, or Destructive tags at the end. Below is a look at how the warnings will be. Both severe thunderstorm warnings and special weather statements/significant weather advisories will have tags at the bottom of the alerts indicating the expected hazards, threat level and whether the storms severity is observed or radar indicated. The goal of the changes and impact-based warnings is to focus on providing more information and the exact severity of a storm will be relayed to the public more effectively. Sometimes storms barely reach the "severe" criteria of having 58 mph winds or greater and or hail larger around 1" or larger in diameter but other storms are extremely dangerous such as Derechos (A long lived intense wind storm). The Derecho in parts of Iowa last year had winds over 100 mph.
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