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DYnamical and Microphysical Evolution of Convective Storms

This study investigates the dynamical and microphysical evolution of convective storms, particularly focusing on rainfall rates observed on August 7, 2010, at 06:10 UTC using data from the Chilbolton radar. Using high-resolution radar images and MetOffice Nimrod data, the research implements a labelling algorithm to track rainfall features based on a minimum threshold. This work addresses storm characteristics including area, azimuth, and core rainfall maxima, contributing to better understanding storm behavior and improving forecasting techniques.

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DYnamical and Microphysical Evolution of Convective Storms

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  1. DYMECS DYnamical and MicrophysicalEvolution of Convective Storms Thorwald Stein, Robin Hogan, John Nicol

  2. Rainfall [mm/hr] for 7 August 2010 06:10:00 Centered around the Chilbolton radar location 250 200 • MetOffice Nimrod data • Rainfall radar images 1km res • 5min interval • 1/32=0.03125 mm/hr 150 100 50

  3. 0.5 mm/hr 200 • Labelling algorithm • Threshold for minimum rainfall • Threshold for minimum feature size (4km2) 150 100 50

  4. 2.0 mm/hr 200 • Labelling algorithm • Threshold for minimum rainfall • Threshold for minimum feature size (4km2) 150 100 50

  5. 1.0 mm/hr 200 • Labelling algorithm • Threshold for minimum rainfall • Threshold for minimum feature size (4km2) 150 100 50

  6. 1.0 mm/hr 200 • Keep label consistent between images (red) • Register break ups (yellow) • Highlight new storms (green) • Store track (magenta) and lifetime 150 100 50

  7. 200 • Per storm, store: • Area • Azimuth • Range • [u,v] • Centroid • Bounding box • Et cetera... • Local rainfall maxima within storm (core, cell) work in progress... 150 100 50

  8. 200 Following a long-lived storm 150 100 50

  9. Processing tree (in minutes) 11:30 New scanprocedure submittedto Chilbolton radar 0:00 Met Office Radar network Volume scan 11:00 Tracking done.File with storm propsand labels produced. 10:30 Nimrod datacut to size on400x400km grid 10:00 Nimrod datafrom BADC now at Chilbolton 05:00 Nimrod rainfall data produced

  10. Scan Scheduling

  11. Scan Scheduling Prioritize storms that are already beingtracked

  12. Scan Scheduling Prioritize storms that are already beingtracked

  13. Scan Scheduling

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