13 Feb 2025 - 07:35 EST
13 Feb 2025 - 12:35 UTC
13 Feb 2025 - 12:35 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 20°N - 158°W - North Pacific Ocean
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0330 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0331 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0332 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0333 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0334 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0335 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0336 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0337 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0338 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0339 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0340 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0341 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0342 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0343 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0344 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0345 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0346 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0347 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0348 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0349 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0350 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0351 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0352 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0353 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0354 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0355 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0356 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 18 May 2024 - 0357 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)