The Lightning Warning Product Fifth Meeting of the Science Advisory Committee 18-20 November, 2009 Dennis Buechler Geoffrey Stano Richard Blakeslee transitioning.

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Presentation transcript:

The Lightning Warning Product Fifth Meeting of the Science Advisory Committee November, 2009 Dennis Buechler Geoffrey Stano Richard Blakeslee transitioning unique NASA data and research technologies to operations National Space Science and Technology Center, Huntsville, AL

2007 SAC Meeting Blue pixels indicate LMA detected lightning activity in last 5 min: red indicates cloud-to-ground lightning. Explore other nowcasting applications for total lightning data – Lightning warnings/alerts – First CG nowcasting Eye towards future GOES-R GLM applications transitioning unique NASA data and research technologies to operations

Accomplishments since SAC 2007 Meeting Refereed Publication – Darden, Nadler, Carcione, Stano, and Buechler, 2009: BAMS Meetings/Conferences – AMS Meteorological Applications of Lightning Data, 2008 – NWA Annual Meeting, 2007,2008 – Southern Thunder, 2009 – GOES-R Risk Reduction Workshop, 2009

transitioning unique NASA data and research technologies to operations Background Lightning accounts for 23.5% of weather related deaths in the U.S. (62 per year). Most people tend to be struck by lightning near beginning or end of storm life-cycle. Lightning also impacts operations for range and other activities Weather related storm death causes in U.S. (Storm Data)

transitioning unique NASA data and research technologies to operations Relevance to NASA/SPoRT Nowcasting lightning probability [> 30 min] – NWS interested in using for TAFs Uses data from NASA’s NALMA Prototype capabilities for GLM

transitioning unique NASA data and research technologies to operations Approach and Methodology Analyze various case studies using gridded NALMA source data Derive probabilities based on whether lightning activity was occurring Determine time lag in lightning probability

Lightning Warning Product Provide gridded fields of lightning probability – Extend out to 30 minutes – Probability in 5 minute intervals – Additional probability for cloud-to-ground strikes Use data from NALMA as GOES Lightning Mapper (GLM) proxy – Preparing for GOES-R transitioning unique NASA data and research technologies to operations

Only Using Lightning Data Lightning must already be occurring (i.e., not forecasting first lightning) 10 km resolution (GLM) NALMA Domain 460 by 460 km NALMA Domain transitioning unique NASA data and research technologies to operations

Current Lightning Warnings Current lightning warnings are mostly for locations or regions (KSC, airports) These usually have a watch when lightning occurs within a specified distance (~20 nm) The watch changes to a warning as lightning gets closer (10 nm) Some NWS offices issue “excessive lightning alerts” transitioning unique NASA data and research technologies to operations

27-28 August 2003 Case Study 10 km resolution grid 1 min time resolution Grouped NALMA sources into flashes A grid point is incremented by 1 when at least 1 source from a flash occurs in it Also examined NLDN CG data Storm movement minimal on this day transitioning unique NASA data and research technologies to operations

Lightning Activity for Entire Domain transitioning unique NASA data and research technologies to operations

Lightning Probability with Time Probability of More Lightning Given Grid Box Has Lightning Now transitioning unique NASA data and research technologies to operations

Lightning Probability Product transitioning unique NASA data and research technologies to operations

Lightning Probability Product transitioning unique NASA data and research technologies to operations Probability of More Lightning Given Grid Box Has Lightning Now Line with embedded supercells

Lightning Probability Product transitioning unique NASA data and research technologies to operations All lightning – POD 0.92 – CSI 0.69 – FAR 0.26 CG lightning – POD 0.95 – CSI 0.12 – FAR 0.88 Statistics for lightning occurring within next 30 minutes (1% probability contour)

Additional Enhancements Incorporate cell tracking algorithm Estimate first lightning probability – Model – Satellite – Radar User feedback transitioning unique NASA data and research technologies to operations

1 st IC to 1 st CG Time transitioning unique NASA data and research technologies to operations

Current lightning safety recommendation: Stay indoors for 30 minutes after the last thunder clap Product shows the time elapsed since the last lightning occurrence Need to determine optimum grid size, etc. New product- time since last lightning transitioning unique NASA data and research technologies to operations

Future Work Use GLM proxy data Investigate alternate products and visualizations Provide displays to NWS Estimate first lightning probability – Model – Satellite – Radar transitioning unique NASA data and research technologies to operations

Questions? transitioning unique NASA data and research technologies to operations