16 May 2026 - 02:30 EDT
16 May 2026 - 06:30 UTC
16 May 2026 - 06:30 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 50°N - 97°W - Manitoba, Canada
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0101 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0104 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0105 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0106 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0107 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0108 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0109 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0110 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0111 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0112 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0113 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0114 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0115 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0116 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0117 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0118 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0119 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0120 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0124 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0126 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0129 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0131 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0134 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0135 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0136 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0145 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0146 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0149 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0150 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 16 Sep 2025 - 0159 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)