16 Apr 2026 - 16:42 EDT
16 Apr 2026 - 20:42 UTC
16 Apr 2026 - 20:42 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 31°N - 81°W - Glynn County, GA
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1630 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1630 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1631 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1631 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1632 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1632 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1633 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1633 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1634 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1634 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1635 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1635 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1636 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1636 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1637 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1637 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1638 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1638 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1639 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1639 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1640 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1640 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1641 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1641 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1642 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1642 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1643 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1643 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1644 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 01 Aug 2025 - 1644 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)