Of
Saturday May 3 at 1:00 p.m. au
Saturday May 3 at 10:00:00 p.m.
Situation
The summer time ends this weekend under the effect of a conflict of air masses between current heat and the arrival of a northeast flow from northern sea.
A first stormy, localized and brief puff, occurred on Friday in Aquitaine. This is the first in a series that will strengthen this Saturday and Sunday on two thirds of the country.
Trend to come
-Saturday, thunderstorms will burst north of the Loire in the afternoon then again in Midi-Pyrénées in the evening. The stormy activity will be dispersed but punctually supported north of the Loire, and will stop quickly in the evening with the arrival of the fresh air.
Southwest thunderstorms in the evening will be more violent with a risk of hail and gusts of wind.
– On Sunday, they will mostly burst south of the Loire and will mainly shift to the East and the south, affecting Occitanie, the Rhône valley, the Alps and the North East. The accumulation of precipitation could cause sudden floods, especially near rivers. Wind gusts, sometimes exceeding 100 km/h, and hail will remain major threats.
This alert will evolve accordingly. Pay attention to our updates.
Observation
The first stormy salvo went back faster than expected from Spain from midday on Friday. The coastal departments were mainly affected, but the cumulators remained completely moderate. Time becomes calmer after 10 p.m. and tonight.
Evolution
This Friday evening: End of thunderstorms between 10 p.m. and 11 p.m. in the southwest, with a progression of these thunderstorms from Aquitaine to Limousin.
SATURDAY :
Risk period: From Saturday 1 p.m. to Saturday 10 p.m.
Regions concerned: North of the Loire and Midi-Pyrénées-Auvergne
Settings: Halt (especially in Champagne-Ardennes and Midi-Pyrénées). Briefs and strong sometimes stationary showers (loc 30 to 40 mm).
Sunday :
Regions concerned: From the Pyrenees to Rhône-Alpes via Occitanie.
Risk period: 10 h / 23 h
Settings: Strong cumulative rain (Ariège and Rhône-Alpes, up to 65 mm). Wind gusts.
Before and during the storm episode
– Avoid non -essential trips during the risk period (Friday 5 p.m. to Saturday 00 p.m.).
– Return or secure exterior objects (garden furniture, flower pots, parasols …) to prevent them from being carried away by the wind.
– Shelter your vehicle, if possible, to limit the damage in case of hail.
– Log away from trees, metallic structures and watercourses during the thunderstorm.
In case of heavy sudden rains
– Never engage in a flooded road, even partially.
– On the road, reduce your speed, increase the safety distances, and beware of gusts under thunderstorm.
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