NLSI - Providing expert training and consulting for lightning problems

Contact Us »
Site Map »
Home »
Back to Section 6 Contents »

 ~ National Lightning Safety Institute ~

Section 6.2.1

World Lightning Map

Average World Thunderstorm Days/Year


Lightning Frequency Maps are unreliable because lightning varies considerably from year to year. However, these maps provide a general indication of lightning activity. The following lightning maps are displayed in two different references ~ Thunderstorm Days per Year (TD/YR) and Flash Density per Square Kilometer (FD/KM). TD/YR are based upon human observation of "how many days was thunder heard?" FD/KM is based upon a networked ground-based sensor system, as provided by Global Atmospherics lnc. (see more at www.glatmos.com).


About NLSI | NLSI Business Services | Lightning Incidents
Personal Lightning Safety | Structural Lightning Safety | Reference Information


National Lightning Safety Institute
Providing expert training and consulting for lightning problems