Thunderstorm northeast of Greeley, Colorado on evening of July 12, 1996 during STERAO-A field project.

Looking south from Ft. Lupton, Colorado at large thunderstorm anvil on evening of July 12, 1996.

Looking west from I-25 and CO-66 intersection at line of convective cells that had formed over Rocky Mountains and were moving east on afternoon of June 22, 1996. Note rain shafts from individual cells.

Colorado State University Doppler radar site near Greeley, Colorado. June 22, 1996 storm in background.

NOAA P-3 aircraft used for air chemistry sampling during STERAO-A.