||An upper low moved from southern AZ across southern NM and far west TX over an air mass that was rather moist for early May in this area. The air mass was very unstable, such that any ground based circulation (e.g. gustnadoes) would quickly spin up within strong updrafts. One technician near White Sands Missle Range HQ observed a gustnado along a gust front from a storm farther west grow rapidly upward under a strong thunderstorm. Once the landspout had formed, it moved slowly northeast but persisted for more than 40 minutes (52 minutes according to NSSL). It remained over unpopulated desert terrain and thus no damage occurred. The tornado lasted far longer than one would expect for a landspout. It was concluded that since it connected with a cell that had supercellular tendencies, this accounted for the longevity. Due to the somewhat high thunderstorm base and little precipitation around the funnel, the tornado was easily viewed by El Paso residents up to 30 miles away. Several other severe cells developed that afternoon, with another weak tornado briefly touching down about 25 miles to the northeast.