17 Jan 2026 - 08:25 EST
17 Jan 2026 - 13:25 UTC
17 Jan 2026 - 13:25 UTC
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Cleveland, OH - Geostationary Lightning Mapper
2 hour loop - 24 images - 5 minute update
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Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1111 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1116 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1121 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1126 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1131 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1136 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1141 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1146 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1151 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1156 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1201 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1206 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1211 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1216 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1221 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1226 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1231 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1236 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1241 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1246 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1251 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1256 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1301 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 17 Jan 2026 - 1306 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)