An Examination of Tornadogenesis during the 01 January 2022 Triana, Alabama Tornado

High Shear, Low CAPE severe weather events are a common occurrence during the cold-season months in the Southeastern United States. At 0124 UTC on 02 January 2022, an EF-0 tornado formed near the town of Triana, Alabama and the University of Alabama in Huntsville Advanced Radar for Meteorological and Operational Research (ARMOR), located at the Huntsville International Airport (KHSV). This paper aims to examine the boundary layer evolution and overall tornadogenesis period using meteorological data provided by the UAH Mobile Atmospheric Profiling Network (MAPNet). Radar features, including a hook echo, and TDS were analyzed using data from ARMOR, the NWS KHTX WSR-88D radar, and the KGWX WSR-88D radar near Columbus, MS. Surface data was collected from the KHSV ASOS station, UAH SWIRLL, and numerous citizen weather observer program (CWOP) stations in close proximity to the tornadic storm. 915 MHz wind profiler, ceilometer, microwave profiling radiometer (MPR), and sodar data from the UAH Mobile Integrated Profiling System (MIPS) on the UAH campus were also incorporated for a further examination of the boundary layer structure. RAP and HRRR model soundings and balloon sounding data from UAH SWIRLL were all examined to monitor the evolution of the upper-air, and boundary layer conditions. A sounding launched from UAH SWIRLL at 0019 UTC on 02 January 2022, one hour before tornadogenesis, revealed a 0-1 km SRH value of 384 m2/s2, 0-1 km Shear value of 42 kts, and a SBCAPE value of 341 J/kg. Additionally, a surface temperature of 23 C and dewpoint temperature of 18 C were recorded at the time of the launch. A veering hodgraph shape was also depicted in this sounding indicating favorable conditions for tornado development. A boundary containing stratiform precipitation located north of the Tennessee River was defined using data from the MIPS 915 MHz wind profiler and the ARMOR radar. This boundary and merger of the linear system enhanced the development of tornadogenesis southwest of Triana, AL near the Tennessee River. Tornadogenesis occurred directly from the bow-echo radar signature approximately 7 km from the ARMOR radar. At 0128 UTC, ARMOR detected a hook-echo signature and ongoing tornado debris signature roughly 4 km from the radar. ARMOR was the only radar which picked up any tornadic radar signatures with the storm. The NWS Hytop radar, 75 km ENE of ARMOR, did not detect any rotation associated with the tornadic storm. Immediate results from this study include the examination of the linear system, ARMOR radar analysis, balloon and model sounding analysis, MIPS profiler, and surface data results. Current research efforts include a velocity-azimuth display (VAD) analysis for wind estimates of wind profile parameters in close proximity of the tornadogenesis location from the ARMOR radar, and examination of the overall depth of the tornadic storm from ARMOR. Further, the goal of this study aims to provide a better understanding of how high-shear low-CAPE environments, boundary layer evolution, and cold-pools influence tornadogenesis.