9 Feb 2025 - 04:34 EST
9 Feb 2025 - 09:34 UTC
9 Feb 2025 - 09:34 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 38°N - 118°W - meso LOOKUP NEEDED for 38N-118W
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1830 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1831 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1832 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1833 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1834 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1835 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1836 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1837 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1838 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1839 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1840 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1841 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1842 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1843 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1844 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1845 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1846 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1847 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1848 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1849 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1850 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1851 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1852 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1853 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1854 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1855 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1856 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 27 Jan 2025 - 1857 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)