Deep convection 2 Wilfried Jacobs DWD Meteorological Training and Conference Centre.
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Transcript of Deep convection 2 Wilfried Jacobs DWD Meteorological Training and Conference Centre.
![Page 1: Deep convection 2 Wilfried Jacobs DWD Meteorological Training and Conference Centre.](https://reader031.fdocuments.us/reader031/viewer/2022020106/56649f485503460f94c69f6b/html5/thumbnails/1.jpg)
Deep convection 2
Wilfried Jacobs
DWD
Meteorological Training and Conference Centre
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Purpose
• To enable you to interpretate small and meso scale structures in radar images identification of relevant structures
corresponding conceptual model( related weather)
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Pre-requesites
Pre-reading of material in relation to
"Deep convection Part 2".
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Content
1. Quiz based upon self study
2. Detailed investigations of radar images – (mainly super cells in relation to conceptual
models and "weather")• Intensities• Doppler
3. Quiz (time depending)
4. Questions & answers
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1. Quiz (self study)
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Single cell: Please, mark the correct answer(s) ( )
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Multi cell: Please, mark the correct answer(s) ( )
Blueish: high reflectivities
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Super cell: Please, mark the correct answer(s)
Blueish: high reflectivities
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Please, mark the correct answer(s) ( )
Blueish: approachingRedish-pink: veering away
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Please, mark the correct answer(s) ( )
Blueish: approachingRedish-pink: veering away
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2. Examples conceptual models(Many Images from Peter Lang (DWD))
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Super cells
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Radar Berlin: 03 July 2003, around 15 UTC
1 km 3 km + 15 Min
RR2 km
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Weak meso cyclone (06 June 2002, around 15 UTC, Feldberg / Black forrest)
Erroneous pixel? animations!
2 km
1 km
Ra
Rotation about 12m/s 6 km
Ra
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18:25
Tornado of Wittenberg, 12.06.02, 18:15
No extreme dBz
R2 km
Rotation about 20 m/s
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Hail near Munich (23 June 2008, about 13 UTC)
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Hail near Munich (23 June 2008, around 13 UTC)
"tilted tower", hail in the upper part
Tornado possible
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Hail near Munich (23 June 2008, around 13 UTC)Anvil
Prec, light at surface
Storm motion
WER
WER
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Fine structures in super cells (dBz)
2 km
3 km
6 km
12 km
WER / inflow / strong echo gradient (horizontal)
hook echo
WER/ strong echo gradient (vertical)
Updraft
Outlow
FL : flanking line
RFD: rear-flank downdraft (often as Hook-echo)
FFD: Forward flank downdraft
Top: 12 km
FFD
RFD
FL
FL
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Fine structures in super cells (Doppler)
2 km
4 km
6km
9 km
12 km
RFD
inflow
R
partly folding
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Mini Tornado (15 June 2007, 16:15 UTC)
2 km radar Munich
R
2 km, radar HP
No clear rotation, line orientated shear stronger
R
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Squall line
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Hazardous weather over Southwest Germany (30 May 2008, 01 UTC)
Gus
tline
3 kmR
R
Folding
Gusts at least: (please tick ):
< 20 m/s
< 30 m/s
> 35 m/s 2 km
2 km
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Single / multi cells
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20:26 20:41 20:56 21:11
8 km
CON (1 km) DIV (8 km)
DIV 1 km
Weakening of a convective cell
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Quiz
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Where do you expect a flanking line? (please mark ( ))
2 km
3 km
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Where do you expect a WER ? (please mark ( ))
2 km
3 km
WER
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6 km
FL : flanking line
RFD: rear-flank downdraft (often as Hook-echo)
FFD: Forward flank downdraft
Where do you find the outflowwith possibly precipitation hail (please mark ( ))?
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Where do you expect the highest risk to tornado ? (please mark ( ))
Tornado possible
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Difficult: Where is the inflow (please mark ( ))?
2 km
R
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Where do you expect the outflow and possible precipitation (please mark ( ))
6km
R
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Comming next
• "My Part deep convection 3"– Practical nowcasting
• Potential and weaknesses of data types (NWP, satellite, obs, radar) during nowcasting process
• Case studies among other during class room part
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Thank you!Question?