Lightning Jump Success Posted in General on May 19, 2015 by Kristin Calhoun. The Lightning Jump Detection Algorithm indicated a sigma of 5.00 at 2009UTC (see below). This was proceeded by a sigma of 4.00. A tornado was reported at 2030UTC, 21 minutes after the 5 sigma, a successful case of predicting a severe.Meanwhile, the ProbSevere product showed 54% at 2030UTC then peaked at 74% at 2032UTC. This was after report of the tornado. -snowstrm