8 Aug 2026 - 18:55 EDT
8 Aug 2026 - 22:55 UTC
8 Aug 2026 - 22:55 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 43°N - 104°W - Sioux County, NE
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0552 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0553 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0554 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0555 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0556 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0557 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0558 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0559 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0600 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0601 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0602 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0603 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0604 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0605 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0606 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0607 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0608 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0609 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0610 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0611 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0612 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0613 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0614 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0615 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0616 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0617 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0618 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0619 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0620 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 14 Jul 2026 - 0621 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)