17 Apr 2026 - 02:52 EDT
17 Apr 2026 - 06:52 UTC
17 Apr 2026 - 06:52 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 36°N - 114°W - Near Mohave County, AZ
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1053 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1055 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1056 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1105 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1106 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1107 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1108 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1109 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1110 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1111 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1113 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1114 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1115 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1116 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1117 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1118 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1119 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1120 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1121 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1123 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1124 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1125 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1126 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1127 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1128 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1152 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1153 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1154 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1155 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 06 Sep 2025 - 1156 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)