18 Apr 2026 - 03:57 EDT
18 Apr 2026 - 07:57 UTC
18 Apr 2026 - 07:57 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 20°N - 159°W - North Pacific Ocean
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0130 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0131 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0132 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0133 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0134 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0135 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0136 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0137 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0138 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0139 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0140 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0141 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0142 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0143 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0144 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0145 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0146 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0147 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0148 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0149 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0150 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0151 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0152 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0153 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0154 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0155 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0156 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0157 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 0158 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Mar 2026 - 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)