15 Jan 2026 - 06:50 EST
15 Jan 2026 - 11:50 UTC
15 Jan 2026 - 11:50 UTC
GOES-19 Mesoscale view - Geostationary Lightning Mapper at 41°N - 94°W - Clarke County, IA
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0353 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0354 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0355 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0356 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0357 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0358 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0359 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0400 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0401 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0402 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0403 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0404 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0405 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0406 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0407 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0408 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0409 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0410 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0411 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0412 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0413 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0414 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0415 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0416 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0417 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0418 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0419 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0420 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0421 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 03 Sep 2025 - 0422 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)