Lightning density maps provided by Vaisala-GAI (formally Global Atmospherics), Tuscon, Arizona. Map is for general informational and educational purposes only and is not indicative of current or future lightning activity. Lightning data provided by the U.S. National Lightning Detection Network.©

The 5-year Flash Density Map shows the average amount of lightning resocrded in 1996-2000. The average amount of lightning that occurs in any given area varies significantly from year to year, as shown the in annual maps for 1996 and 2000.
Flash Density
flashes/sq. km/year
16 and up
8 to 16
4 to 8
2 to 4
1 to 2
0.5 to 1
0.25 to 0.5
0+ to 0.25

5-year Flash Density Map--U.S.
(1996-2000)