GRIB2 - TABLE 4.2-0-17

PARAMETERS FOR DISCIPLINE 0
CATEGORY 17

(Meteorological products, Electrodynamics category)

In Section 0, Octet 7 = 0
In Section 4, Octet 10 = 17

Revised 02/23/2021
Red text depicts changes made since 05/28/2019


Number
(In Section 4, octet 11)
 Parameter Units
 Abbrev
0
 Lightning Strike Density m-2 s-1 LTNGSD
1
 Lightning Potential Index (LPI) (see Note 1) J kg-1 LTPINX
2 Cloud-to-Ground Lightning Flash Density km-2 day-1 CDGDLTFD
3 Cloud-to-Cloud Lightning Flash Density km-2 day-1 CDCDLTFD
4 Total Lightning Flash Density (see Note 2) km-2 day-1 TLGTFD
5 Subgrid-scale lightning potential index (see Note 3) J kg-1 SLNGPIDX
6-191 Reserved

192-254
 Reserved for Local Use

192
 Lightning
 non-dim
 LTNG
255
 Missing



Notes:

(1) Definition of LPI after Lynn et. al.: Lynn, B., and Y. Yair, 2010: Prediction of lightning flash density with the WRF model, Adv. Geosci., 23, 11-16 Yair, B. Lynn, C. Price, V. Kotroni, K. Lagouvardos, E. Morin, A. Mugnai, and M. Llasat, 2010: Predicting the potential for lightning activity in Mediterranean storms based on the Weather Research and Forecasting (WRF) model dynamic and microphysical fields, JGR, 115, D04205, doi:10.1029/2008JD010868



(2) The total lightning flash density is the sum of cloud-to-ground and cloud-to-cloud lightning flash densities (see Lopez, P., 2016: A lightning parameterization for the ECMWF Integrated Forecasting System, Monthly Weather Review, 144, 3057-3075).

(3) The lightning potential index (LPI, Number 1), as defined by Lynn et al. 2010, is derived from grid scale (resolved) model information in convection permitting models. In contrast, the subgrid-scale lightning potential index is derived from subgrid-scale information (from parameterized convection) for models with coarser resolution.


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