18 Feb 2025 - 12:20 EST
18 Feb 2025 - 17:20 UTC
18 Feb 2025 - 17:20 UTC
GOES-East Mesoscale view - Geostationary Lightning Mapper at 34°N - 79°W - Horry County, SC
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0210 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0211 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0212 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0213 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0214 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0215 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0216 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0217 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0218 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0219 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0220 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0221 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0222 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0223 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0224 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0225 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0226 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0227 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0228 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0229 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0230 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0231 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0232 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0233 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0234 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0235 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0236 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 09 Aug 2024 - 0237 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)