Estimated number of Cloud to Ground (CG) lightning flashes (in thousands) which occur in each county in Colorado per year. These values were gathered by estimating the average flash density for each county, and then multiplying this value by the size of the county. Gilpin and Denver counties had values of 1.6 and 1.2 respectively. The new county of Broomfield is not in this data set, and there are no plans in the immediate future to include this new county. The actual average amount of cloud to ground lightning for the state of Colorado is ~494,000 flashes per year*.

Please visit the flash density maps of the Colorado Lightning Resource Page by clicking here.

Estimated number of cloud to ground lightning flashes per year for the state of Colorado. Numbers are in thousands.

*Approximately 494,000 cloud to ground lightning flashes occur in Colorado every year. Colorado ranks 26th in the nation in total amount of cloud to ground lightning flashes. (Ron Holle, quotedfrom the Rocky Mountain News,  30th June, 2001).

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