DYnamical and Microphysical Evolution of Convective Storms

DYnamical and MicrophysicalEvolution of Convective Storms

Thorwald Stein,Robin Hogan, John Nicol

DYMECS

• MetOffice Nimrod data

• Rainfall radar images 1km res

• 5min interval• 1/32=0.03125

mm/hr

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Rainfall [mm/hr] for 7 August 2010 06:10:00 Centered around the Chilbolton radar location

0.5 mm/hr

• Labelling algorithm• Threshold for

minimum rainfall• Threshold for

minimum feature size (4km2

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2.0 mm/hr

• Labelling algorithm• Threshold for

minimum rainfall• Threshold for

minimum feature size (4km2

)

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100

150

200

1.0 mm/hr

• Labelling algorithm• Threshold for

minimum rainfall• Threshold for

minimum feature size (4km2

)

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100

150

200

1.0 mm/hr

• Keep label consistent between images (red)

• Register break ups (yellow)

• Highlight new storms (green)

• Store track (magenta) and lifetime

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• Per storm, store:– Area– Azimuth– Range– [u,v]– Centroid– Bounding box– Et cetera...

• Local rainfall maxima within storm (core, cell) work in progress...

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Following a long-lived storm

Processing tree (in minutes)

05:00 Nimrodrainfall dataproduced

10:00 Nimrod datafrom BADC nowat Chilbolton

10:30 Nimrod datacut to size on400x400km grid

0:00 Met Office Radar networkVolume scan11:00 Tracking done.

File with storm propsand labels produced.

11:30 New scanprocedure submittedto Chilbolton radar

Scan Scheduling

Scan Scheduling

Prioritize storms that are already beingtracked

Scan Scheduling

Prioritize storms that are already beingtracked

Scan Scheduling