19 Jan 2026 - 04:06 EST
19 Jan 2026 - 09:06 UTC
19 Jan 2026 - 09:06 UTC
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Charleston, SC - Geostationary Lightning Mapper
2 hour loop - 24 images - 5 minute update
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Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0651 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0656 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0701 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0706 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0711 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0716 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0721 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0726 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0731 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0736 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0741 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0746 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0751 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0756 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0801 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0806 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0811 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0816 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0821 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0826 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0831 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0836 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0841 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 19 Jan 2026 - 0846 UTC
GLM Extent Density of Lightning 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 this visualization, GLM is superimposed on a GeoColor background image.
GLM data is produced between 54°N and 54°S.
• For more details, see the Geostationary Lightning Mapper Quick Guide, (PDF, 1.98 MB)