1 / 28

Hurricane Charlie Radar Images

This utility utilizes WSR-88D data to deduce the central pressure and radius of maximum wind of landfalling tropical cyclones. It provides valuable insights for tracking and predicting cyclone intensification.

johnsonjuanita
Télécharger la présentation

Hurricane Charlie Radar Images

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. VORTRAC – A Utility to Deduce Central Pressure and Radius of Maximum Wind of Landfalling Tropical Cyclones Using WSR-88D DataWen-Chau Lee NCAR/EOL Paul Harasti UCAR/NRL Michael Bell NCAR/EOL

  2. Hurricane Charlie Radar Images

  3. VTD-derived Axisymmetric Quantities: Vertical Velocity Angular Momentum Pressure Gradient

  4. Charlie X: 0.56 km Y: 0.70 km RMW: 0.82 km VT: 1.9 m/s Katrina X: 0.86 km Y: 2.58 km RMW: 4.38 km VT: 9.00 m/s Confidence Level

  5. VCP 12 VCP 121 WSR-88D Scanning Sequence

  6. GBVTD Formulation: Vd: Doppler velocities VM: Mean flow VT: Tangential wind VR: Radial velocity w: Vertical velocity vt: Terminal velocity : Elevation angle : Angle in GBVTD coordinate : Azimuth angle M: Math angle of the mean flow Cn: Amplitude of cosine wavenumber n Sn: Amplitude of sine wavenumber n

  7. HVVP Mean Wind Profiles

  8. The GBVTD TechniqueLee, Jou, Chang, and Deng (1999)

  9. VTD Formulation For L=3, M=N=2:

  10. Charley (2004)

  11. What have we learned from Charley? • Rapid intensification can occur near landfall • Coastal Doppler radar can effectively detect rapid intensification if they are operated properly • Vertical structure of the eyewall can provide indications on intensity change (e.g., more scans at lower angles are needed) • Most intense winds may occur in the eyewall but severe storms (e.g., tornado) may occur in the outer rainband precedes the arrival of the eye • Longer range is preferred over higher Nyquist velocity when setting scanning parameters

  12. `

More Related