French airport weather data malfunctions, mysterious trades accurately bet profit over $20,000.

The French meteorological office reported to the police after discovering abnormal weather sensor data at the country's largest airport, and after someone placed a large number of bets on the popular prediction market. The automatic temperature readings at Charles de Gaulle International Airport weather station showed that on the evenings of April 6 and April 15, the temperature unexpectedly rose by 4 degrees Celsius and 5 degrees Celsius respectively, reaching the record high for that day at the station. Meteorologist Harari stated that the data on April 15 was particularly abnormal. The weather station data showed that the temperature reached 18.8 degrees Celsius in the late afternoon that day, then began to decrease, but within 12 minutes soared from 16.9 degrees Celsius to 21.9 degrees Celsius. Data from the prediction market Polymarket showed that a trader won over $21,000 by betting that "18 degrees Celsius would not be the highest temperature recorded that day." Harari stated that tampering with airport sensors could have serious consequences and affect airport operations. Polymarket data also showed that these contracts attracted approximately $1.4 million in bets. Recently, so-called "prediction markets" have raised concerns about insider trading, including accurately betting on the timing of the ceasefire in Iran just before President Trump announced it, prompting the White House to send emails warning employees to stay away from such trading.