37 degrees in the middle of the night, the effect of the “hair dryer”, what is the “heat blast”, this very rare phenomenon that affected the eastern Pyrenees region

It is a rare and at the same time impressive climatic phenomenon that affected the Pyrenees on the night of June 14 to 15. A “heat explosion” suddenly caused the night temperature to rise to 37 degrees in Cap Pierre.

Temperatures ranging from 22 to 37 degrees in just a few minutes with winds gusting at 154 km / h, the Pyrenees – Orientales, and more precisely Cap Pierre, experienced an extremely rare weather phenomenon on the night of June 14 to 15 . Meteorologists speak of a “heat blast”.

Suddenly, the wind blows, the humidity drops, and temperatures literally explodeAgrometeorologist Serge Zaka explains that this phenomenon only occurs once a year in France, he says.It’s a bit like opening the oven door.”“Guaranteed hairdryer effect” laughs the passionate storm specialist.

It is precisely the “collapse” of the storm that was the source of this phenomenon last night. As it weakened, the mass of warm air descended higher toward the ground and compressed the air beneath. The pressure caused the air to warm up, creating a powerful hot storm.

“It’s a bit like a bike pump. When you pump air, that air heats up, which is why the pump is hot after use.”

Serge Zakka is an agricultural meteorologist

The result was amazing. At 2:26 am, the thermometer showed a temperature of 37 degrees. A few minutes ago, the temperature was only 22 degrees in the same place. A gust of 154 km/h was recorded and suddenly caused the mercury to rise.

The monthly temperature record was broken in Cape Town. Previous 36.4 degrees on June 28, 2019.

This phenomenon is rare but will be more frequent, however, this time, we are not referring to global warming. Still according to Serge Zaka, the search for explanation is preferred on the part of the condensation of weather stations. The phenomenon of “heat blast” is actually very local, and because the measurement points are increasing more and more, these “hot waves” are observed more often.

The last “free blast” in France was also recorded in Occitanie, in Arquette-en-Val, in Aude. It was July 12, 2021. Within 30 minutes, the temperature rose from 19.8 degrees to 34.6 degrees with recorded winds of 131 km/h. However, nothing can be done with the worst free-explosion ever documented, the Coberle, Texas explosion. On June 15, 1960, a storm with a speed of 120 km / h caused the temperature to rise to 60 degrees. The “hot wave”, nicknamed “Devil’s Storm”, destroyed all the plants in the area.

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