1. Thunderstorm Electrification and Lightning Simulation • Edward “Ted” Mansell • NSSL/WRDD

2. Lightning at NSSL • NSSL is a leader in both observation and numerical simulation of thunderstorm electrification and lightning. • Growing interest in using lightning in forecast data assimilation and for nowcasting (e.g., identifying severe potential, cell tracking). Balloon launch of field meter Simulated Cloud-to-Ground lightning strike NSSL Laboratory Review February 17-19, 2009 2 2

3. NSSL Numerical Modeling Positive leaders Negative leaders • The NSSL storm-scale model is a unique tool due to enhancements by NSSL scientists: Research in dynamics, microphysics, electrification, and data assimilation. NSSL Laboratory Review February 17-19, 2009 3 3

4. + Lightning and Charge Structure – + Altitude (km) West -30km -25km East Model-simulated charge structure and lightning Inferred charge structure from lightning observation NSSL Laboratory Review February 17-19, 2009 4 4

5. Lightning correlations Flash rate vs. Graupel Isolated cells Groups of cells Graupel (soft hail) echo volume (km3) NSSL Laboratory Review February 17-19, 2009 6 5