Simulation of a small Florida thunderstorm. This version used the hybrid "RR" scheme for noninductive charging. (Inductive graupel-droplet charging was active, but not significant.) Negatively-charged lightning channels (white) indicate regions of positive ambient charge. Positively-charged lightning channels (yellow) propagate into the main ambient negative charge region. The light gray surface denotes the simulated cloud boundary. The vertical electric field value at the surface is shown by white contour lines (intervals of 1 kV/m, dashed for negative values). Simulated reflectivity is shown at the surface and a see-through vertical plane through the storm along with wind vectors. Wind vectors are spaced at 500m horizontally and 250m vertically. (The model resolution is 250m by 125m.) Isotherms are indicated by light blue contours (in plane of the vectors, from 0 to -40C in 10 degree increments)

The simulation used the 1810Z TCO sounding from 9 August 1991 during the CaPE field program. The resolution is 250 m in the horizontal and 125 m in the vertical.