23 Mar 2025 - 18:03 EDT
23 Mar 2025 - 22:03 UTC
23 Mar 2025 - 22:03 UTC
GOES-East Mesoscale view - Geostationary Lightning Mapper at 35°N - 109°W - meso LOOKUP NEEDED for 35N-109W
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0230 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0231 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0232 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0233 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0234 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0235 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0236 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0237 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0238 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0239 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0240 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0241 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0242 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0243 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0244 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0245 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0246 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0247 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0248 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0249 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0250 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0251 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0252 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0253 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0254 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0255 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0256 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Feb 2025 - 0257 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)