1. Long Range Lightning Detection Estimated 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)
1. Minimal Correlation (CG) as to Lead time for storm severity.
2. IC/CC is a precursor to convective development.

3. Long Range Lightning Detection Best-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
1. Minimal Correlation (CG) as to Lead time for storm severity.
2. IC/CC is a precursor to convective development.

6. Christmas Nor’easter 2002

7. Lightning Triggered by Upper-Level Impulse
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 mb
Lightning Triggered by Upper-Level Impulse

8. 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 mb
Pressure Tendency mb over 3 hrs
Lightning Near Deepening Low Center

9. Pressure Tendency - - 7 mb over 3 hrs
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 mb
Pressure Tendency mb over 3 hrs

10. Pacific Extratropical Cyclone 18-19 December 2002

11. Downstream Convection, some Lightning near Low Center
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

12. 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.

13. Pressure Tendency - - 4 mb over 3 hrs
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 mb
Pressure Tendency mb over 3 hrs

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

15. 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

16. 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.

17. 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