DYnamical and Microphysical Evolution of Convective Storms Thorwald Stein, Robin Hogan, John Nicol DYMECS.

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Presentation transcript:

DYnamical and Microphysical Evolution of Convective Storms Thorwald Stein, Robin Hogan, John Nicol DYMECS

MetOffice Nimrod data Rainfall radar images 1km res 5min interval 1/32= mm/hr Rainfall [mm/hr] for 7 August :10:00 Centered around the Chilbolton radar location

0.5 mm/hr Labelling algorithm Threshold for minimum rainfall Threshold for minimum feature size (4km 2 )

2.0 mm/hr Labelling algorithm Threshold for minimum rainfall Threshold for minimum feature size (4km 2 )

1.0 mm/hr Labelling algorithm Threshold for minimum rainfall Threshold for minimum feature size (4km 2 )

1.0 mm/hr Keep label consistent between images (red) Register break ups (yellow) Highlight new storms (green) Store track (magenta) and lifetime

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

Following a long-lived storm

Processing tree (in minutes) 05:00 Nimrod rainfall data produced 10:00 Nimrod data from BADC now at Chilbolton 10:30 Nimrod data cut to size on 400x400km grid 0:00 Met Office Radar network Volume scan 11:00 Tracking done. File with storm props and labels produced. 11:30 New scan procedure submitted to Chilbolton radar

Scan Scheduling

Prioritize storms that are already being tracked

Scan Scheduling Prioritize storms that are already being tracked

Scan Scheduling