Merging of Lightning Data from GLM and Ground-Based Networks Peter Roohr NWS/STI, Chief TLIWG May 9-13, 2016 GOES-R PG/UR Meeting National Weather Center.

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Presentation transcript:

Merging of Lightning Data from GLM and Ground-Based Networks Peter Roohr NWS/STI, Chief TLIWG May 9-13, 2016 GOES-R PG/UR Meeting National Weather Center Norman Oklahoma

Objectives of Feb 2-4, 2016 Meeting Obtain a comprehensive understanding of the GOES-R Lightning Mapper (GLM) Ascertain what data and products we have with ground-based lightning detection systems Gain understanding of the limits of AWIPS with lightning data and how we can overcome them Define requirements for merged lightning data as well as products

Who Participated? NWS Centers (SPC, AWC, OPC) NWS WFOs (Pueblo CO, Philadelphia PA, Sterling Va, Lubbock TX, Blacksburg Va, Raleigh NC) NWS HQ (STI, AFS, CLO) NOAA NESDIS NASA (SPoRT) CIMMS/NSSL Companies (Vaisala, ENI, WSI) Environment and Climate Change Canada

GLM Considerations When will the mapper be placed in orbit? When will data be available to analyze? How does technology differ from ground- based RF systems? What new data can we expect from mapper? Should GLM data be used more on a regional basis (strategic) or locally (tactical)? What are challenges with downlinks?

Ground-Based LDS Where do we have total lightning data? Can we expand to OCONUS? What new products such as lightning altitude, flash extent and multiplicity will be coming? How can we take more advantage of what total lightning has to offer?

Limits of AWIPS What are current limitations of AWIPS for processing and displaying lightning data? What can we do to work with contractor and NWS to overcome these limitations? How is AWIPS showing lightning data from GLM? Can we go beyond flash, group, event? What can the TLIWG do to develop code for showing lightning data on AWIPS? This includes LMA data

Requirements for Lightning Data What is the listing of requirements forecasters at centers and WFOs have for total lightning data? What do forecasters want from GLM? What merged products are needed and at what resolution/detail? Who will lead R2O process for getting new products into operations? TLIWG? How do we track all projects?

Vision Universal understanding of advantages of GLM and Ground-Based LDS Solid requirements document showing what is needed out of systems separately as well as them merged; include MRMS and integration with NEXRAD, satellite data Solid R2O document that establishes process for getting new code and techniques into operations; includes govt, academia, industry Comprehensive yet easy to understand training

Focus: Ground-Based Systems Scott Rudlosky, Geoffrey Stano Incorporation of many diverse networks including LMA, GLD 360, WWLLN Networks define CF differently with pulses Upgrades in DE, LA, CG vs. CF, polarity ID ENI emphasis on TL over CONUS, Vaisala on peak current/polarity for CG around world Forecaster ultimately determines what TL info is important (trends, CG location, etc.) Funding/O&M for LMA a large concern for NWS

Focus: Satellite-Based Systems Steve Goodman Lots of excitement from forecasters on GLM, slated to go into orbit in October 2016 GLM will be in test period thru Spring 2017 Showed animations against other data (Level 2) Review panel for initial data will include offices from NESDIS and NWS Data: Events, Groups, Flashes; new radiance data will spark new research and R2O Thoughts on getting data into Multi-Radar/Multi-Sensor (MR/MS) architecture Concerns over parallax and pixel counts along scans

Focus: Satellite-Based Systems Questions/Concerns/Recommendations What are the NWS plans for GLM data and displays? Products derived from GLM will appear on NWS main page What plans does NESDIS/OSPO/NCEI have to make imagery and products available? Coordination with NWS? What archive process has been set up for data? Heard that NCEI has been funded to create 20 year archive Would like GOES-R Steering Group to include TLIWG in determining NWS WFO and NCEP involvement in validation

Focus: AWIPS Concerns Kristin Kuhlman Huge: Training Focal Points at WFOs (total lightning bundles) Different time packets for data (1 min Grd, 20 sec GLM) Current AWIPS lightning menus are VERY hard to decipher Displays of lightning data very different depending on vendor Group agreed that 1 km x 1 km resolution best for flash densities especially in areas of overshooting tops Need to go beyond flash density plugin and address advantages of events/groups/flashes; many more products WFOs feel it will be important to get raw data in real-time Wants: Peak current, areal extent, total energy, height, multiplicity Need to fix progressive disclosure problems with all lightning

Tactical vs. Regional Use of Data No limits should be placed on tactical vs. regional use of any merged lightning data products Gives community a chance to investigate how merged data can help with relationships (like lightning to fire ignition) If WFOs can integrate/process raw data they will quickly see how to approach use of total lightning data for many events Must closely examine radar versus LMA for potential of detecting lightning height (integrate GLM data) GLM data will help with operational use of lightning jump algorithm and the tracking of cells

Areas to Focus on for Merged Data Lightning Safety: Examine use of GLM event information to see how it compares with ground-based pulse data for channels leading to dangerous CG flashes for all events and all seasons. Tie to transportation (fueling/maintenance)

Areas to Focus on for Merged Data Aviation: Improved convective monitoring and depicting decay and intensification along corridors; AWC, WFOs and CWSUs love TL data for SIGMETs and TAFs. Need to look at how to merge GLM into FAA/airline operations/planning

Areas to Focus on for Merged Data Severe Weather: Merged data will help Prob Severe. Will enhance ability to see lightning jumps with MR/MS (showing flash rate and std dev of rates). Improved links to graupel, ice crystal patterns and precipitable water with not only GLM but also 16 IR/near IR/Vis channels of GOES-R

Areas to Focus on for Merged Data Situational Awareness and DSS: Utilize data from LMA, Vaisala, and GLM to better portray spatial extent of TL. Need to build for GIS and customer systems, and make sure lightning is accurately correlated to pseudo-reflectivity/QPE

Areas to Focus on for Merged Data Tropical Meteorology: Opportunity for analysis of max winds with merged TL data. Examine lightning rates for developing waves and changing convection out of reach of land-based radars. Need to look at event vs pulse histories as related to intensification

Areas to Focus on for Merged Data Thunderstorm Initiation: Great opportunity to use total lightning data to refine/replace the use of dBZ to determine convective initiation (which has been seen to be 50-50)

Areas to Focus on for Merged Data Climatology: We can finally get an accurate and consistent assessment of total lightning across the western hemisphere and add on to CG analyses of the past. Where and when are the most intense lightning producing storms on earth??

Areas to Focus on for Merged Data Winter Lightning: It has long been known that winter convection has both a very high percentage of TL as well as positive CG lightning. We should be able to further our understanding of the convective signatures of lake/sea effect snow bands, the role electrification can play in enhanced frozen precipitation, and study further the thunderstorms along major ocean currents during winter.

Questions/Comments/Complaints?? GOES-R Earth Networks TL Network Vaisala TLS200 Thanks!!!