15 Feb 2025 - 09:56 EST
15 Feb 2025 - 14:56 UTC
15 Feb 2025 - 14:56 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 18°N - 116°W - North Pacific Ocean
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1350 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1351 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1352 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1353 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1354 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1355 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1356 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1357 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1358 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1400 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1401 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1402 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1403 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1404 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1405 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1406 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1407 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1408 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1409 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1410 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1411 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1412 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1413 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1414 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1415 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1416 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1417 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 25 Jul 2024 - 1418 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)