13 Jan 2026 - 21:13 EST
14 Jan 2026 - 02:13 UTC
14 Jan 2026 - 02:13 UTC
« WFO Overview »
Sioux Falls, SD - Geostationary Lightning Mapper
2 hour loop - 24 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 - 14 Jan 2026 - 0001 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0006 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0011 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0016 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0021 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0026 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0031 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0036 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0041 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0046 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0051 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0056 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0101 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0106 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0111 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0116 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0121 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0126 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0131 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0136 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0141 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0146 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0151 UTC
Geostationary Lightning Mapper - Lightning flash extent over GeoColor - 14 Jan 2026 - 0156 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)