The weather forecast for Wednesday May 18: peak of the heat dome over a large majority of the country

After a heavy and mild night, the big agglomerations experience high temperatures from the morning.

The weather is still very summery across the country, and the risk of strong thunderstorms increases from Wednesday evening in the North West.

At dawn, it is already 17°C in Paris, 16°C in Lyon and 22°C in Perpignan, according to La Chaîne Météo*.

The sky is generally clear, except in the North-West where sheets of low cloud persist, with humidity in the low layer due to the thunderstorms of the previous day.

Read alsoWhere is the heat dome coming to France this week?

On the coasts of the English Channel, between North Finistère and Cotentin, the sky is not clear and the temperatures are much more pleasant than in the rest of the country, where they largely reach summer normals.

At the North-East borders, temperatures go up to 29-30°C.

In Paris, it is up to 31°C in the afternoon, and in the South-West, 33-34°C.

It is in Montélimar that the temperature is maximum, with a peak of 35°C.

Significant risk of strong thunderstorms

The regions affected by thunderstorms, more or less violent, will be as follows:

, eastern

,

,

, western

The alert issued for severe thunderstorms currently only targets the departments of

and

, for which thunderstorms are accompanied by violent gusts and some precipitation.

A degradation which can still evolve and be the subject of a new alert, in the event that it spreads to other regions, in particular to the South-West.

The weather in your area

In

, the sky is overcast in the morning, but gradually clears up, while remaining partially cloudy during the day.

There is a risk of thunderstorm in the evening.

Temperatures fluctuate between 21 and 29°C for the maximum, generally from West to East.

Between

,

,

and

, clouds persist and the atmosphere is particularly heavy and hot in the morning.

During the day, the sky is loaded with larger clouds which give relatively violent storms in the evening.

Temperatures reach 28 to 31°C in the afternoon.

In

,

,

,

and in the

, a few clouds remain, but do not prevent the sun from overhanging the sky throughout the day.

At high altitudes, precipitation may fall slightly.

Temperatures go up to 25 to 34°C during the day.

From

to the

, clouds from the West cause thunderstorms which then move up towards the land in the evening.

The maximum temperatures are particularly high during the day, worthy of a high summer day;

they reach 31 to 35°C.

*The Weather Channel is a property of the Figaro group.