9 Mar 2026 - 21:27 EDT
10 Mar 2026 - 01:27 UTC
10 Mar 2026 - 01:27 UTC
GOES-19 Mesoscale view - Geostationary Lightning Mapper at 30°N - 81°W - St. Johns County, FL
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1015 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1016 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1017 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1018 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1019 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1020 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1021 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1022 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1023 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1024 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1025 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1026 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1027 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1028 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1029 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1030 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1031 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1032 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1033 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1034 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1035 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1036 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1037 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1038 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1039 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1040 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1041 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1042 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1043 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 13 Feb 2026 - 1044 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)