14 Feb 2025 - 20:02 EST
15 Feb 2025 - 01:02 UTC
15 Feb 2025 - 01:02 UTC
GOES-East Mesoscale view - Geostationary Lightning Mapper at 31°N - 101°W - Near Crockett County, TX
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1228 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1229 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1230 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1231 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1232 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1233 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1234 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1235 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1236 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1237 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1238 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1239 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1240 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1241 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1242 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1243 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1244 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1245 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1246 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1247 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1248 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1249 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1250 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1251 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1252 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1253 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1254 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 30 May 2024 - 1255 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)