Climatological analysis of hazardous precipitation in southeastern United States

Authors: Daniel Burow*, University of Tennessee, Knoxville, Kelsey Ellis, University of Tennessee, Knoxville
Topics: Climatology and Meteorology, Hazards, Risks, and Disasters, Hazards and Vulnerability
Keywords: Hazards, climate, precipitation, Southeast
Session Type: Paper
Day: 4/5/2019
Start / End Time: 1:10 PM / 2:50 PM
Room: Marshall East, Marriott, Mezzanine Level
Presentation File: No File Uploaded

We assess the climatological significance and patterns of precipitation falling on hazardous weather days in metropolitan areas across the southeastern United States. We define a hazardous weather day as a day the National Weather Service issued a warning for a tornado, severe thunderstorm, flood, winter weather, or tropical cyclone (landfalling or inland). We quantify the precipitation that occurred on these days and assess seasonal patterns. Recent research suggests that days with extreme precipitation are likely to increase in future climate change scenarios, and our results provide a baseline with which to compare future changes in precipitation patterns. As tropical cyclones also pose a hazard to society, this approach presents another method of measuring the contribution of tropical cyclones to the precipitation climatology of the United States. We also use measurements of daily precipitation and peak five-second wind gust to compare hazardous and non-hazardous days. As we focus on urban areas, this research is also relevant to those studying urban heat island-induced convection and its resultant precipitation and hazards.

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