12 Jul 2025 - 06:05 EDT
12 Jul 2025 - 10:05 UTC
12 Jul 2025 - 10:05 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 39°N - 115°W - Near White Pine County, NV
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2143 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2144 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2145 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2146 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2147 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2148 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2149 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2150 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2151 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2152 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2153 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2154 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2155 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2156 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2157 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2158 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2159 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2200 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2201 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2202 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2203 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2204 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2205 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2206 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2207 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2208 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2209 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2210 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2211 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 04 Jul 2025 - 2212 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)