12 Jul 2025 - 20:52 EDT
13 Jul 2025 - 00:52 UTC
13 Jul 2025 - 00:52 UTC
GOES-19 Mesoscale view - Geostationary Lightning Mapper at 38°N - 75°W - Near Worcester County, MD
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0024 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0025 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0026 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0027 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0028 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0029 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0030 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0031 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0032 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0033 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0034 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0035 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0036 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0037 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0038 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0039 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0040 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0041 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0042 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0043 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0044 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0045 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0046 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0047 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0048 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0049 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0050 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0051 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0052 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 12 Jul 2025 - 0053 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)