18 Feb 2025 - 13:41 EST
18 Feb 2025 - 18:41 UTC
18 Feb 2025 - 18:41 UTC
GOES-East Mesoscale view - Geostationary Lightning Mapper at 34°N - 69°W - North Atlantic Ocean
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1254 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1255 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1256 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1257 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1258 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1300 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1301 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1302 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1303 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1304 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1305 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1306 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1307 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1308 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1309 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1310 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1311 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1312 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1313 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1314 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1315 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1316 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1317 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1318 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1319 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1320 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1321 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2024 - 1322 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)