Hurricane Beryl's Eyewalls

Your Task

The National Hurricane Center commented on the presence of secondary eyewalls in Hurricane Beryl between 1 and 5 July based on passive microwave imagery. Can you identify periods with a secondary eyewall in the available microwave imager and sounder 37, 89, 183 ± 3 GHz data from AMSR2, ATMS, GMI, MHS, and SSMIS sensors?

  1. 1 July 2024
  2. 2 July 2024
  3. 3 July 2024
  4. 4 July 2024
  5. 5 July 2024
The Tools

With the analysis tool to the right, you can do the following:

  • Toggle microwave imagery with radio boxes
      37 GHz 89 GHz 183 ± 3 GHz
  • Step through images by
    • Dragging the circle on the bar
    • Clicking the Start, Backward, or Forward buttons
    • Use the ←, →, or Spacebar
  • Zooming in
    • Left Click or Scroll to zoom in
    • CTRL + Left Click, CMD + Left Click, or Scroll to reset

Click for more information Tom Whittaker's HTML5 AnimationS webapp (HAniS)

The Data

Passive microwave imagery overlayed on top of GOES-16 longwave infrared window channel imagery. Not all sensors have channels near these frequencies so expect gaps.

Basic information:

  • 37 GHz False Color RGB — Shows precipitation structure (more info)
    • — Ocean
    • — Cloud liquid water or land
    • — Cloud ice scattering
  • 89 GHz Horizontal Polarization — Shows ice scattering in deep convection (more info)
    89 GHz color map
  • 183 ± 3 GHz — Shows temperature of layer containing a certain amount of water vapor and ice scattering associated with deep convection. Common on CubeSats/SmallSats
    183 GHz color map
Example schematic of secondary eyewall progression
Typhoon Maria at (a) 1013 UTC 9 Jul 2018 (intensity: 65 m s−1), (b) 0459 UTC 10 Jul 2018 (intensity: 55 m s−1), and (c) 0015 UTC 11 Jul 2018 (intensity: 48 m s−1) showing an example of eyewall replacement in the 89 GHz passive microwave imagery. Published 2024 by the American Meteorological Society in Cheung et al. (2024).

These data are from the NOAA/CSU Tropical Cyclone PRecipitation, Infrared, Microwave, and Environmental Dataset (TC PRIMED).

Real Time Microwave Imagery
Disclaimer

The contents of this webpage do not necessarily reflect any position of the U.S. Government or the National Oceanic and Atmospheric Administration (NOAA).