12 Feb 2025 - 15:16 EST
12 Feb 2025 - 20:16 UTC
12 Feb 2025 - 20:16 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 57°N - 135°W - Near Sitka, AK
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2130 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2131 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2132 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2133 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2134 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2135 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2136 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2137 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2138 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2139 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2140 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2141 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2142 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2143 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2144 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2145 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2146 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2147 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2148 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2149 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2150 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2151 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2152 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2153 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2154 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2155 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2156 UTC

Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2024 - 2157 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)