19 Jan 2026 - 19:02 EST
20 Jan 2026 - 00:02 UTC
20 Jan 2026 - 00:02 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 37°N - 112°W - Coconino County, AZ
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1142 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1143 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1144 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1145 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1146 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1147 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1148 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1149 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1150 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1151 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1152 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1153 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1154 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1155 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1156 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1157 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1158 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1159 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1200 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1201 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1202 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1203 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1204 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1205 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1206 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1207 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1208 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1209 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1210 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 28 Aug 2025 - 1211 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)