19 Jul 2025 - 21:27 EDT
20 Jul 2025 - 01:27 UTC
20 Jul 2025 - 01:27 UTC
GOES-19 Mesoscale view - Geostationary Lightning Mapper at 38°N - 89°W - Franklin County, IL
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Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1944 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1945 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1946 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1947 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1948 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1949 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1950 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1951 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1952 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1953 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1954 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1955 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1956 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1957 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1958 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 1959 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2000 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2001 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2002 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2003 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2004 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2005 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2006 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2007 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2008 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2009 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2010 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2011 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2012 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 19 Jul 2025 - 2013 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)