17 Jul 2026 - 04:00 EDT
17 Jul 2026 - 08:00 UTC
17 Jul 2026 - 08:00 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 - 15 Jul 2026 - 1953 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 1954 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 1955 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 1956 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 1957 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 1958 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 1959 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2000 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2001 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2002 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2003 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2004 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2005 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2006 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2007 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2008 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2009 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2010 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2011 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2012 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2013 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2014 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2015 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2016 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2017 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2018 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2019 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2020 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2021 UTC
Geostationary Lightning Mapper - Lightning flash extent density over IR Band 13 - 15 Jul 2026 - 2022 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)