Comparison of infrasound array data to NEXRAD weather radar for tornadic and non-tornadic storms in the southeastern United States

Long-duration infrasound recordings were performed using several arrays deployed in the southeastern United States during the Spring of 2018. This data has been analyzed via several beamforming methods to detect and locate sources related to severe weather, including tornadic storms. In parallel with this analysis, we also collected weather-related data products from National Weather Service, including their database of severe weather events as well as NEXRAD radar maps covering the entire time period. In this paper, we compare the weather-related data to infrasound activity through time. As previously reported, we found infrasound tracks that are clearly aligned with NWS-identified tornados. Through this new, extended comparison spanning two months of recordings at each site, we have also found that some non-tornadic storms also generate infrasound tracks. The data show that some strong (but non-tornadic) storms generate clear infrasound tracks while others do not. This finding continues to motivate additional research into the relationship between storm structure and infrasound emissions.