21 Jan 2026 - 03:00 EST
21 Jan 2026 - 08:00 UTC
21 Jan 2026 - 08:00 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 55°N - 149°W - North Pacific Ocean
2.5 hour loop - 30 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 density over IR Band 13 - 21 Jan 2026 - 0726 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0727 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0728 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0729 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0730 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0731 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0732 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0733 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0734 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0735 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0736 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0737 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0738 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0739 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0740 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0741 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0742 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0743 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0744 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0745 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0746 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0747 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0748 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0749 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0750 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0751 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0752 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0753 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0754 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 21 Jan 2026 - 0755 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)