World-Wide Lightning-Location Network: WWLLN & Tropical-Cyclone Monitoring Natalia Solorzano Jeremy Thomas Robert Holzworth Reported by: Abram R. (“Abe”)

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Presentation transcript:

World-Wide Lightning-Location Network: WWLLN & Tropical-Cyclone Monitoring Natalia Solorzano Jeremy Thomas Robert Holzworth Reported by: Abram R. (“Abe”) Jacobson, ESS/UW (Earth & Space Sciences,University of Washington)

WWLLN – CG STROKE DETECTION EFFICIENCY Variation in the WWLLN CG stroke detection efficiency with NZLDN determined return stroke peak current for the old and new algorithms (Rodger et al., 2009) Variation in the WWLLN CG stroke detection efficiency with NZLDN determined return stroke peak current for the old and new algorithms (Rodger et al., 2009)

WLLNN location accuracy for Nargis Rodger et al., 2009

HURRICANE RITA – Category 5, Sept. 21 and 22, 2005 Max. intensity increase: Sept. 21, 2005

Similar results: Squires, 2006 EYEWALL LIGHTNING

Rita: max. intensity increase Sept. 21, 2005

Rita: Sept. 21, 14:00 – 15:00 UT Shao, 2005: UTC WWLLN UTC

Hurricane Katrina – Category 5 Max. intensity increase: Aug. 28, 2005

Katrina EYEWALL LIGHTNING: Max. intensity increase: 08/28/2005

Katrina- 08/28/2005 Shao, 2005 – (1) 17:30 – 19:30 UT (2) 21:30 – 23:30 UT WWLLN:

Hurricane Wilma – Category 5 Max. intensity increase: 10/19/2005

Wilma – Eyewall lightning

Durian - Supertyphoon EYEWALL LIGHTNING

Typhoon – Supertyphoon Chanchu EYEWALL LIGHTNING Max. intensity increase: May 14, 2006

Similar results: Squires and Businger, 2008 using LR-NLDN WWLLN EYEWALL LIGHTNING (< 100 km from storm center)

Rita: max. intensity increase Sept. 21, 2005

NARGIS - APRIL 30, 2008

Nargis eyewall lightning (<100 km from storm center) and max. sustained winds

Apr 27, 21 Z Apr 28, 12 Z Apr 28, 18 Z Apr 29, 00 Z

Nargis eyewall lightning (<100 km from storm center) and max. sustained winds

Apr 29, 18 Z April 30, 17:30 Z May 01, 09:00 Z May 01, 23:00 Z Prior to intensifi cation Intens ification Weakening

NARGIS APRIL 30, 17:00 UT These lightning are pinpointing the region of active convection in the eyewall. This active convection area is not evident by examining only the infrared data, which show a large area of cold cloud-tops in the inner core. The subsequent rapid strengthening of Nargis was underestimated by forecasters who relied mostly on infrared satellite images and did not use lightning data.

TRMM IMAGES TRMM 85 GHz 18:31 Z METEOSAT IR 18 Z WWLLN 17:30-18:30 Z TRMM APR 30, 03 Z – Prior to MAIN INTENSIFICATION