10 May 2026 - 22:30 EDT
11 May 2026 - 02:30 UTC
11 May 2026 - 02:30 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 8°N - 128°W - North Pacific Ocean
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2307 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2308 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2309 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2310 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2311 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2312 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2313 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2314 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2315 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 May 2026 - 2316 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)