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GOES Nextgen Satellites 1978 Exploratory Meeting on Atmospheric - - PowerPoint PPT Presentation
GOES Nextgen Satellites 1978 Exploratory Meeting on Atmospheric - - PowerPoint PPT Presentation
GOES Nextgen Satellites 1978 Exploratory Meeting on Atmospheric Electricity and Severe Storms https://www.youtube.com/watch?v=238tp02d5DA August 16 2012 Dust Devils are Minor Whirlwinds NASA Sponsored Sferics Research
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https://www.youtube.com/watch?v=238tp02d5DA
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August 16 2012
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Dust Devils are Minor Whirlwinds
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NASA Sponsored Sferics Research https://www.youtube.com/watch?v=KSluFoa3S8M&t Sferics Studies on NASA Technical Report Server https://www.youtube.com/watch?v=5UAilTz8Ubo
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Portion of Lightning Detected by ENTLN!
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Dark Lightning
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7:05am EST – Velocities with cell 03 have intensified
- nce more over Chilton County and show a clear
mesocylone (Still designated 408). No TVS Signature is given but this coincides with a tornado report near Jemison which is later confirmed by NWS as an EF-0 with a path length of 2.55 miles.
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Minor Whirlwind
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From HGX WFO from August 25 to August 27 2017
150 tornado warnings issued (#49 to #199) 31 tornadoes reported 126 tornado warnings with no tornado reports within polygon 25 warning polygons with tornado reports Several warnings and tornado reports indicate no radar signature and times in question Several warnings and reports involve waterspout sightings
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From EYX, JAX, MFL, MLB, TBW from Sept 10 to Sept 11 2017
93 tornado warnings issued 18 tornadoes reported 6 w/o warning
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Lans Rothfusz National Severe Storms Lab Challenges of Current Warning System
Warning Polygons are Blunt Instruments
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Conclusions
➢ Velocity Couplets are radar signatures, NOT Tornadoes! ➢ Not all lightning arrays are equal ➢ Minimal Mesocyclone Signatures – MDA Ranking <=6 ➢ Total Sferics is a useful discriminate variable
Benefits increased significantly with the assumption that LMS could not only improve average lead time, but could result in measurable improvements in the probability that warnings would be issued for severe weather outbreaks.
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