14 Dec 2025 - 21:58 EST
15 Dec 2025 - 02:58 UTC
15 Dec 2025 - 02:58 UTC
GOES-19 Mesoscale view - Geostationary Lightning Mapper at 33°N - 99°W - Throckmorton County, TX
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0450 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0451 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0452 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0453 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0454 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0455 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0456 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0457 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0458 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0459 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0500 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0501 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0502 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0503 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0504 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0505 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0506 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0507 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0508 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0509 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0510 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0511 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0512 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0513 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0514 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0515 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0516 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0517 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0518 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Nov 2025 - 0519 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)