9 Feb 2025 - 14:12 EST
9 Feb 2025 - 19:12 UTC
9 Feb 2025 - 19:12 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 40°N - 100°W - Furnas County, NE
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1914 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1915 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1916 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1917 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1918 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1919 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1920 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1921 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1922 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1923 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1924 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1925 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1926 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1927 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1928 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1929 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1930 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1931 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1932 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1933 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1934 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1935 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1936 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1937 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1938 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1939 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1940 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Aug 2024 - 1941 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)