BURSTLow pressure system tracking over intensely heated land results in large hailstones and frequent lightning
After several days of intense heat, large parts of France were hit by a major outbreak of severe thunderstorms on Wednesday night as powerful supercells swept north-east across the country.
A low pressure system that originated near Portugal tracked over the unusually warm Bay of Biscay towards northern France late on Wednesday, bringing a strong upper-level disturbance over land that had been intensely heated through the day. As a result, several long-lived supercells formed, producing large hailstones, frequent lightning, damaging winds and torrential rainfall.
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