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NOAAs Hurricane Earl Flight Analysis: Evolution of Wind Speed and Axisymmetric Tangential Wind

Explore the geographic coverage and intensity evolution of NOAA's P-3 and G-IV flights during Hurricane Earl. Analyze the axisymmetric tangential wind and wind speed evolution. Study the impact of environmental winds at different altitudes and evaluate the RI episodes. Uncover the structural changes during the weakening stages leading up to ET.

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NOAAs Hurricane Earl Flight Analysis: Evolution of Wind Speed and Axisymmetric Tangential Wind

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Presentation Transcript

  1. Summary and quick-look analyses of NOAA flights into Hurricane Earl Track

  2. Geographic coverage of P-3 flights

  3. P-3 and G-IV coverage during intensity evolution P-3 missions G-IV missions

  4. Evolution of axisymmetric tangential wind (shaded, m/s) during RI 12:33Z Aug 30 21:44Z Aug 28 13:21Z Aug 29 13:40Z Aug 30 23:03Z Aug 28 21:00Z Aug 29 21:23Z Aug 30 00:18Z Aug 29 22:13Z Aug 29 22:31Z Aug 30 09:39Z Aug 29 23:22Z Aug 29 23:33Z Aug 30 10:52Z Aug 29 00:44Z Aug 30 11:58Z Aug 29 11:17Z Aug 30

  5. Evolution of wind speed (shaded, m/s) from 1-9 km altitude 0114Z Sept 2 2343Z Sept 2 9 km 9 km 5 km 5 km 1 km 1 km

  6. Hodographs of environmental winds (m/s) from 0.5-12 km altitude 9 5 3 6 7 10 4 8 11 11 8 9 12 10 2 12 7 6 1 5 4 3 2 1

  7. Summary • historic dataset collected in Hurricane Earl • nearly complete lifecycle, sampled at 12-h intervals for inner core by P-3’s, 24-h intervals for environment by G-IV • significant RI episode sampled by Doppler radar prior to, during, and after • steady-state period as a major hurricane sampled, including vortex interaction with increasing upper-level SW shear • weakening stages sampled, including period leading up to ET First thoughts on questions to address • how does vortex evolve during RI? Symmetric and asymmetric evolution? Kinematic and thermodynamic evolution? • what’s relative role of convective-, vortex-, and environmental-scale processes in RI? • how does mature hurricane respond to increasing vertical shear (tilt, wind field asymmetries)? • what is structural change during weakening and prior to ET? • and many more…..

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