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The IOP6 (24 September 2012) heavy precipitation event over Southern France: observational and model analysis Lagouvardos, K. (1), Kotroni, V. (1), Bousquet.

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Presentation on theme: "The IOP6 (24 September 2012) heavy precipitation event over Southern France: observational and model analysis Lagouvardos, K. (1), Kotroni, V. (1), Bousquet."— Presentation transcript:

1 The IOP6 (24 September 2012) heavy precipitation event over Southern France: observational and model analysis Lagouvardos, K. (1), Kotroni, V. (1), Bousquet O. (2), Defer E. (3), Lampiris A. (1), Molinie, G. (4), Ribaud, J-F (2) (1) National Observatory of Athens, Greece, (2) CNRM-GAME, CNRS and Météo-France, France, (3) LERMA - CNRS/Observatoire de Paris, France, (4) UJF-Grenoble 1, LTHE UMR 5564, Grenoble, France The IOP6 (24 September 2012) heavy precipitation event over Southern France: observational and model analysis Lagouvardos, K. (1), Kotroni, V. (1), Bousquet O. (2), Defer E. (3), Lampiris A. (1), Molinie, G. (4), Ribaud, J-F (2) (1) National Observatory of Athens, Greece, (2) CNRM-GAME, CNRS and Météo-France, France, (3) LERMA - CNRS/Observatoire de Paris, France, (4) UJF-Grenoble 1, LTHE UMR 5564, Grenoble, France

2 2 INTRODUCTIONINTRODUCTION Study of a SOP1 case characterized by organized convection and increased lightning activity Initial analysis of observational data: raingauges, satellite imagery, radar, lightning (ZEUS and Lightning Map Array). Analysis of cloud-resolving simulations using WRF model with focus on the microphysical structure of the event.

3 SYNOPTIC CHART: 06 UTC 24 SEPTEMBER

4 ZEUS LIGHTNING DATA

5 RAINGAUGE DATA

6 01-03 UTC METEOSAT-IR 24 SEPTEMBER

7 0200 UTC 0215 UTC 0230 UTC 0245 UTC

8 01-03 UTC RADAR REFLECTIVITY-2000 m agl

9 LIGHTNING MAP ARRAY

10 WRF (v. 3.4.1) NESTED DOMAINS (6 and 2 km horizontal grid increment) WRF (v. 3.4.1) NESTED DOMAINS (6 and 2 km horizontal grid increment)

11 11 WRF setup (6 and 2 km horizontal grid increment) WRF setup (6 and 2 km horizontal grid increment) Initialization: ECMWF analyses Start: 1200 UTC 23 September 2012 End: 0000 UTC 25 September 2012 Two-way nesting, 40 vertical levels Microphysics: Morrison double-moment microphysical scheme, 5 species (cloud droplets, cloud ice, snow, rain and graupel) Kain-Fritch convective parameterization scheme activated only in Grid 1

12 WRF Grid 1 mslp, 10-m wind and precipitation 12

13 WRF Grid 1 Θe, wind and geopotential at the 850 hPa level 13

14 WRF Grid 2 precipitation forecast 00-06 UTC 14

15 WRF Grid 2 precipitation forecast: 06-12 UTC 15

16 WRF Grid 2 hourly precipitation+10 m wind valid at 01-04 UTC 16

17 WRF Grid 2 vertical velocity at 0100-0400 UTC 24 September 17

18 18 WRF ice, snow and graupel mixing ratios at 0300 UTC 24 September

19 19 CONCLUDING REMARKS-PROSPECTS The case presented a very interesting convective nature, especially during the first 6 hours of the day (24 September 2012) with rain exceeding 80 mm in 6 hours, increased lightning activity and deep development (as seen by the Nimes radar and LMA data) WRF simulation was in general successful, while the microphysical characteristics of the model-generated convection were coherent with the observed zone of lightning activity Prospects: study the life-cycle of the microphysical characteristics of the event, in conjunction with radar and lightning data Perform additional cloud resolving simulations with WRF for other IOPs, comparison with other models.

20 20 THANK YOU

21 21 ADDITIONAL MATERIAL

22 22

23 23

24 06-08 UTC RADAR REFLECTIVITY-2000 m agl

25 06-08 UTC METEOSAT-IR 24 SEPTEMBER

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