Study regions Colorado = northeastern quadrant of the state

1. Study regions Colorado = northeastern quadrant of the state Oklahoma = non-panhandle Oklahoma plus adjoining portion of Texas, down to Dallas Alabama = northern Alabama plus south central Tennessee Storm classifications: isolated - an individual or multi-cell storm with an isolated anvil MCC - standard definition organized - squall line or cold front driven lines of convection where the anvils merge. Does not include MCCs.

4. diurnal cycle of NLDN detected cloud-to-ground flashes at all 3 sites

5. diurnal cycle of NLDN detected cloud-to-ground flashes at all 3 sites

6. diurnal cycle of NLDN detected cloud-to-ground flashes at all 3 sites

7. diurnal cycle of NLDN detected cloud-to-ground flashes at all 3 sites

8. CAPE values are from every grid-point of the 40 km Eta model, averaged over each study region, every 6-hours

9. CAPE values are from every grid-point of the 40 km Eta model, averaged over each study region, every 6-hours

10. 2004

11. 2005