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Lightning Detection: Events, Groups & Flashes

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Example display of GLM proxy lightning data centered over the Sterling, Virginia NWS office at 21:04 UTC on 07 December 2006.
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Currently weather forecasters can use lightning data provided by a surface-based network to help "nowcast" severe weather. This is a valuable tool; however, it only has the capability of detecting cloud-to-ground flashes. The GOES-R satellites will have the capability to detect both cloud-to-ground and inter-cloud lightning, through use of the Geostationary Lightning Mapper (GLM). This will help severe weather forecasters identify thunderstorms which are rapidly intensifying, and enable them to issue accurate and timely severe thunderstorm and tornado warnings. Lightning Detection Video