Here is where they will break out Tuesday and Wednesday

Attention, change of time, radical. The 51st heat wave recorded in France since 1947, which started on Friday August 8, ends.

While temperatures in recent days have sometimes been 10 ° C above the climatological averages, they should pass slightly below seasonal averages with regard to the maximum in this middle of the week, with sometimes less than 20 ° C in the north of the country this Wednesday, August 20.

Thunderstorms will concern many regions.

Cold air at altitude will rush into France

The explanation? “The powerful anticyclone that was positioned on the country will sag and cold air at altitude will rush,” summarizes, on actu.frthe meteorologist Yann Amice.

This colder air mass will come to circulate in an environment (very) hot and could cause violent phenomenabetween this Tuesday August 19 and this Wednesday, August 20.

This atmospheric rocking finds its origin in the ex-tropical time Dexter. Recycled by general circulation, it first favored the establishment of the anticyclonic dorsal responsible for the heat wave. But the cold heart of the associated anomaly, now progressing towards France, radically changes the situation: it is superimposed on an environment still burning, creating the ideal conditions for violent thunderstorms.

The most exposed areas? Occitania, Auvergne, the Rhône valley, and the Alps, probably, but Few sectors should actually escape instability and thunderstorm showersas cold air is positioned on the country.

The Mediterranean regions will be particularly exposed also. Of the strong thunderstorm cells, accompanied by gusts of wind, hail and above all Acumulation of significant precipitation are to be feared.

In the backdrop of this brutal weather change, the ambivalent role of the ex-Time Dexter: both engine of the heat wave and trigger for these upcoming thunderstorms.

Then, we will have to monitor the ex-Ouragan Erin …

At the end of the week, the current will switch to the north and fresher air will settle on the country after the furnace that the country has just known. And it will then be necessary to monitor the remains of Hurricane Erin, the first hurricane of the season above the North Atlantic.

He should lead in particular A very strong swell on the westin a context of great tides, and again of instability.

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