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August-

August-. September. NSF NOAA NRL NCAR UW UM. RAINEX Workshop, Miami, 5-7 June 2006. Workshop. 5-7 June. 2006. NSF NOAA NRL NCAR UW UM. Motivation for RAINEX. Understanding Rapid Intensity Changes.

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August-

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  1. August- September NSF NOAA NRL NCAR UW UM RAINEX Workshop, Miami, 5-7 June 2006

  2. Workshop 5-7 June 2006 NSF NOAA NRL NCAR UW UM

  3. Motivation for RAINEX Understanding Rapid Intensity Changes

  4. Famous Rapidly Intensifing StormHurricane Opal (1995) Pressure drop Cat 2 Cat 3 rainband Cat 4 Cat 5 Day 1 2 3 4 5 Intensity change problem: How do interactions of eyewalls & rainbands in the mature storm… …lead to intensity changes like these?

  5. RAINEX Flight Coordination ELDORA radar

  6. Hurricanes investigated in RAINEX Katrina Ophelia Rita

  7. Katrina

  8. Atlas et al. ‘63 stratiformdownwind convectiveupwind Katrina-28 August NRL

  9. Ref Barnes et al. ‘83 ELDORA data Vel Katrina-28 August NRL

  10. Katrina-28 August Confirms “Barnes” structure

  11. Rita

  12. RAINEX Flights in Hurricane Rita

  13. 0ºC Rita-21 September Intensifying to Cat. 5 Eye Eyewall

  14. Rita-22 September-Concentric Eyewalls

  15. Rogers et al. ‘03 Rita-23 September-Sheared Shear

  16. Ophelia

  17. A B B Ref A Vel Dry air Ophelia-9 September-Dry Midlevel Inflow

  18. Data Availability

  19. CONCLUSIONS RAINEX Notables: • 3 hurricanes—Katrina, Ophelia, & Rita • Innovative satellite-based flight control • First use of ELDORA in a hurricane • Data available via NCAR Field Catalog Katrina and Rita details: • K & R’s spiral rainbands had Atlas & Barnes structures • R sampled in 3 stages: rapid int., 2nd eyewall, shear • Echo cores in eyewalls were linear & oblique • Moat region had eye-like sounding • Dry air entered in subsiding mesoscale midlevel inflows Katrina Ophelia Rita

  20. RAINEX Science Questions • How do rainbands form and evolve? • How do rainbands contribute/influence the hurricane strength and evolution? • Do the rainbands have any influence on the formation of secondary eyewall structure? If so, how? • What is the influence/impact of secondary eyewall generation on the storm intensity? • How do the concentric eyewall circulations influence overall storm intensity and structure? • How does the convective "burst" affect initial storm growth? • How do rainbands and eyewall organize in early stages of storm development? RAINEX Workshop, Miami, 5-7 June 2006

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