Electrodynamics
https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_table4-2-0-17.shtml
LTNGSD
Lightning Strike Density
m-2 s-1
LTPINX
Lightning Potential Index (LPI) (see Note 1)
J kg-1
CDGDLTFD
Cloud-to-Ground Lightning Flash Density
km-2 day-1
CDCDLTFD
Cloud-to-Cloud Lightning Flash Density
km-2 day-1
TLGTFD
Total Lightning Flash Density (see Note 2)
km-2 day-1
LTNG
Lightning
non-dim