12 Aug 2026 - 02:04 EDT
12 Aug 2026 - 06:04 UTC
12 Aug 2026 - 06:04 UTC
GOES-West Mesoscale view - Geostationary Lightning Mapper at 49°N - 114°W - Glacier County, MT
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2240 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2241 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2242 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2243 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2244 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2245 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2246 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2247 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2248 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2249 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2250 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2251 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2252 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2253 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2254 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2255 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2256 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2257 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2258 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2259 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2300 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2301 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2302 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2303 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2304 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2305 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2306 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2307 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2308 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2309 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)