13 Aug 2026 - 23:22 EDT
14 Aug 2026 - 03:22 UTC
14 Aug 2026 - 03:22 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 36°N - 110°W - Apache County, AZ
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2131 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2132 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2133 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2134 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2135 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2136 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2137 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2138 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2139 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2140 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2141 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2142 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2143 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2144 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2145 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2146 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2147 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2148 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2149 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2150 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2151 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2152 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2153 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2154 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2155 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2156 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2157 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2200 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2204 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 10 Aug 2026 - 2205 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)