11 Nov 2025 - 22:29 EST
12 Nov 2025 - 03:29 UTC
12 Nov 2025 - 03:29 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 56°N - 160°W - Near Aleutians East, AK
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2230 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2231 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2232 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2233 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2234 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2235 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2236 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2237 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2238 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2239 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2240 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2241 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2242 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2243 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2244 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2245 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2246 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2247 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2248 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2249 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2250 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2251 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2252 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2253 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2254 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2255 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2256 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2257 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2258 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Oct 2025 - 2259 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)