5 Dec 2025 - 19:07 EST
6 Dec 2025 - 00:07 UTC
6 Dec 2025 - 00:07 UTC
GOES-19 Mesoscale view - Geostationary Lightning Mapper at 32°N - 81°W - Chatham County, GA
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0110 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0111 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0112 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0113 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0114 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0115 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0116 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0117 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0118 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0119 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0120 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0121 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0122 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0123 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0124 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0125 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0126 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0127 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0128 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0129 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0130 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0131 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0132 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0133 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0134 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0135 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0136 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0137 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0138 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 23 Aug 2025 - 0139 UTC
GLM Flash Extent Density over Band 13 is the number of lightning flashes that occur within a grid cell over a given period of time. FED was the first GLM product routinely available to weather service forecasters. The FED product is the best single metric to convey both the quantity and extent of lightning activity. It is useful for both storm trending applications and to depict geographic coverage.
In the FED13 visualization, GLM is superimposed on infrared Band 13 rendered in gray scale.
GLM data is produced between 54°N and 54°S.
• For more details, see the Geostationary Lightning Mapper Quick Guide, (PDF, 1.98 MB)