Off-season cevenol storm affects South of France

Sentinel-1 CSAR IW acquired on 01 March 2022 from 17:39:01 to 17:39:26 UTC
Sentinel-2 MSI acquired on 03 March 2022 at 10:38:39 UTC
Sentinel-1 CSAR IW acquired on 12 March 2022 from 05:52:32 to 05:52:57 UTC
Sentinel-3 SLSTR RBT acquired on 12 March 2022 from 10:03:42 to 10:06:42 UTC
Sentinel-1 CSAR IW acquired on 13 March 2022 from 17:39:01 to 17:39:26 UTC
Author(s): Sentinel Vision team, VisioTerra, France -
Keyword(s): Natural disaster, emergency, storm, river, flooding, precipitations, rainfall, France, Mediterranean Sea
Fig. 1 - S3 SLSTR (12.03.2022) - An off-season cevenol storm affected South of France, causing orographic rainfalls.
Fig. 2 - S1 (13.03.2022) - Radar view while the storm was crossing the Gulf of Lion.
It is a record Cevenol episode for the month of March, the equivalent of 2 to 3 months of rain. A strong deterioration took place on 12-13 March over the Languedoc after several months of drought.
Fig. 3 - S1 (12.03.2022) - View of the region beneath the Montagne Noire hours before the heavy rainfall.
Two to three months of rain fell over the 12-13 March: 300 to 400 mm on the Montagne Noire, 100 to 200 mm from the Espinouse massif to the Cévennes and 50 to 100 mm on the Hérault coast.
Fig. 4 - S1 (01 & 13.03.2022) - Swollen rivers show in dark blue on this multidate composite.
On the Cevennes and the Aubrac, it fell 20 to 50 cm of heavy snow from 1300 meters of altitude.
Fig. 5 - S2 (03.03.2022) + S1 (13.03.2022) - Mask of the open water area after the flooding over the last pre-flooding optical view.
This Cevenol episode was accompanied by a sea wind with gusts between 80-90 km/h on the Hérault coast and a gust of wind in the Toulouse region up to 90 km/h.