19 Jan 2026 - 23:27 EST
20 Jan 2026 - 04:27 UTC
20 Jan 2026 - 04:27 UTC
GOES-West CONUS - Geostationary Lightning Mapper
1 hour loop - 12 images - 5 minute update
To enlarge, pause animation & click the image. Hover over popups to zoom. Use slider to navigate.
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0321 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0326 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0331 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0336 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0341 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0346 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0351 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0356 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0401 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0406 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0411 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 20 Jan 2026 - 0416 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)