Long Range Lightning Detection Estimated Median Location Accuracy - PowerPoint PPT Presentation

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Long Range Lightning Detection Estimated Median Location Accuracy

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  1. Long Range Lightning DetectionEstimated Median Location Accuracy

  2. LOCATION ACCURACY VALIDATION • Verified using LIS satellite mapper in a Study by Boeck et al., (Fall AGU Meeting, 1999) • Verified in a Transcontinental study using the NLDN (Cramer and Cummins, ICAE 1999)

  3. Long Range Lightning DetectionBest-case Detection (nighttime propagation)

  4. FLASH DETECTION EFFICIENCY • Flash Detection Efficiency DECREASES with range from U.S./Canada (NLDN/CLDN only) • ~ 90% near coastline (day/night) • ~ 10% at 2000 km from coastline (day) • ~ 10% at 3200 km from coastline (night) • Can improve significantly with the addition of sensors information from other countries

  5. Christmas Nor’easter 2002

  6. Sea-level Pressure Map at 9 UTC (left panel) and Cloud-to-ground Lightning Detected between 6 and 9 UTC (right panel) 25 December 2002. Central Pressure - 997 mb Lightning Triggered by Upper-Level Impulse

  7. Sea-level Pressure Map at 12 UTC (left panel) and Cloud-to-ground Lightning Detected between 9 and 12 UTC (right panel) 25 December 2002. Central Pressure - 993 mb Pressure Tendency - - 4 mb over 3 hrs Lightning Near Deepening Low Center

  8. Sea-level Pressure Map at 18 UTC (left panel) and Cloud-to-ground Lightning Detected between 15 and 18 UTC (right panel) 25 December 2002. Central Pressure - 979 mb Pressure Tendency - - 7 mb over 3 hrs

  9. Pacific Extratropical Cyclone 18-19 December 2002

  10. Sea-level Pressure Map at 12 UTC (left panel) and Long Range Cloud-to-ground Lightning Detected between 0852 and 1152 UTC (right panel) 18 December 2002. Downstream Convection, some Lightning near Low Center

  11. Sea-level Pressure Map at 18 UTC (left panel) and Long Range Cloud-to-ground Lightning Detected between 1453 and 1753 UTC (right panel) 18 December 2002.

  12. Sea-level Pressure Map at 6 UTC (left panel) and Long Range Cloud-to-ground Lightning Detected between 0253 and 0553 UTC (right panel) 19 December 2002. Central Pressure - 980 mb Pressure Tendency - - 4 mb over 3 hrs

  13. President’s Day Blizzard 16-17 February 2003

  14. Sea-level Pressure Map at 12 UTC (left panel) and Long Range Cloud-to-ground Lightning Detected between 0853 and 1153 UTC (right panel) 16 February 2003. Cold Front Convection

  15. Sea-level Pressure Map at 15 UTC (left panel) and Long Range Cloud-to-ground Lightning Detected between 1153 and 1453 UTC (right panel) 16 February 2003.

  16. Sea-level Pressure Map at 18 UTC (left panel) and Long Range Cloud-to-ground Lightning Detected between 1453 and 1753 UTC (right panel) 16 February 2003. 2-4 Feet of Snow in New England with Low Pressure remaining above 1000 mb