Researchers say individuals should respond to the hazard most pressing at the time and prepare ahead to move locations if necessary.
powerful thunderstorms were loaded with both spin and moisture. Soon after a particularly intense thunderstorm
Almost simultaneously, the moisture-laden storm began to unload exceptionally heavy rain. Then, the Weather Service declared a dire flash flood emergency.
Erik Nielsen, an assistant professor at Texas A&M University who has been studying these events for nearly a decade, and Russ Schumacher, an associate professor at Colorado State University, conducted the first scientific study on TORFF events. Between 2008 and 2020, the pair documented locations that saw both a tornado warning and a flash flood warning within a half-hour. They found thousands of examples, spread from Hawaii to Florida and from California to Maine.
“During Harvey, you had embedded tornadoes within heavy tropical rainbands that were also producing widespread catastrophic flash flooding,” Christian wrote. “The conflicting response actions from these overlapping hazards ended up creating a new separate hazard of the public being unsure of what actions to take to protect themselves.”
But as the visibility of TORFF events continues to increase, the Weather Service is providing training to their forecasters on how to address the overlapping hazards.
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