April 28th took me to southwest Texas and southeast New Mexico to chase upslope storms. By late afternoon such a supercell developed near the Guadalupe mountains and tracked eastward along the Texas/New Mexico border towards Jal. The storm had pretty structure and was tornado warned for a long period of time. There may have been a brief tornado but we were too far away due to poor roads to confirm it. The storm produced large hail and tons of lightning.