14 Mar 2026 - 20:06 EDT
15 Mar 2026 - 00:06 UTC
15 Mar 2026 - 00:06 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 37°N - 116°W - Nye County, NV
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1430 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1431 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1432 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1433 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1434 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1435 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1436 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1437 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1438 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1439 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1440 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1441 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1442 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1443 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1444 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1445 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1446 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1447 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1448 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1449 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1450 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1451 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1452 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1453 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1454 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1455 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1456 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1457 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1458 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Feb 2026 - 1459 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)