Overview - Geostationary Lightning Mapper
WELCOME TO THE GEOSTATIONARY LIGHTNING MAPPER VIRTUAL COMMUNITY
This forum supports Geostationary Lightning Mapper (GLM) implementation and training. The page provides a vehicle for learning about the GLM capabilities and limitations, exploring applications, understanding data quality, and addressing inquiries.
The GLM continuously observes lightning throughout a near hemispheric field of view, capturing spatiotemporal variability on unprecedented scales (Rudlosky et al. 2019). As a high-frame-rate camera that detects light pulses at cloud tops, the GLM differs from the ground-based lightning detection networks most familiar to NWS forecasters. Thus, focused research, development, and training efforts are required to guide the operational application of these new data. A gridded product suite (Bruning et al. 2019) and associated AWIPS configurations were implemented to provide GLM information to forecasters (Sima 2020).
The first product (flash extent density; FED) is available to all NWS weather forecast offices (WFOs) via experimental channels (i.e., the Operations Proving Ground, OPG), with a ‘full disk’ version rolling out during 2020. Additional gridded products (presently average flash area and total optical energy, AFA and TOE) are undergoing a limited demonstration at ~60 WFOs. Work continues on refining display specifications for these and other gridded GLM products. The OPG and Hazardous Weather Testbed (HWT) help develop and test new versions before broader dissemination. These efforts leverage forecaster feedback to improve the gridded products and the ability for forecasters to both interpret and apply them.
The FED is awaiting formal SBN distribution, and a nationwide demonstration during 2020 aims to determine whether the total optical energy (TOE), average flash area (AFA), and/or minimum flash area (MFA) should be distributed via the SBN. Gridded GLM products cannot advance past RL7 without migration to NESDIS generation and distribution. Thus, the NWS is working with NESDIS to shift product generation and distribution to more robust channels. Present plans aim to provide GLM gridded products via official NESDIS channels by Summer/Fall 2022.
Please follow the tabs above to explore training documents, daily GLM status information, product descriptions, and imagery examples.
Archive GLM Grids are available at https://lightning.umd.edu/glm/archive/
Example GLM Imagery - Click the drop down menu in the top right for lots more options!