Weather tracker: Fierce thunderstorms and big hailstones hit parts of Europe
This week, large parts of Europe have been affected by a series of intense thunderstorms, bringing torrential rain, damaging winds, and large hail.
Central France was particularly badly affected by the severe weather, as powerful storm systems swept south-westward across the country. The departments of Loire and Puy-de-Dôme were among the hardest hit, experiencing significant damage from a particularly violent supercell thunderstorm that produced hailstones measuring up to 6cm in diameter – larger than ping-pong balls.
The storm system also generated flash flooding, strong wind gusts, and reports of a localised 'mini-tornado', leaving widespread damage to infrastructure and vehicles in its wake.
The storms were fuelled by warm, saturated air rising from the Mediterranean clashing with cooler air descending from northern Europe. This temperature contrast created significant atmospheric instability. Additionally, the orographic influence of the Vosges and Jura mountain ranges probably contributed to storm intensification by enhancing uplift.
The powerful supercell formed under conditions of high wind shear, where changes in wind speed and direction with altitude encouraged the development of a rotating updraft. These intense updrafts lifted raindrops high into the atmosphere, where they froze and coalesced into large hailstones before falling to the ground with destructive force.
Meanwhile, southern China has once again experienced heavy rainfall, triggering landslides, emergency evacuations, and widespread disruption to transport networks across the region. In Quanzhou County, approximately 300 cubic metres of debris, including soil and large boulders, tumbled down a hillside, blocking a major roadway and bringing traffic to a standstill. In Guilin's Lingui district, rainfall totals exceeded 207mm on Monday alone, highlighting the severity of the ongoing weather system and its impact on the local infrastructure and communities.
Canada is currently battling more than 200 active wildfires, primarily across Saskatchewan and Manitoba, with approximately 2.3 million hectares burnt, most within the past week. At least half of these fires are classified as out of control, and have led to widespread evacuations. Thick smoke from the fires has significantly reduced air quality, spreading across a third of the US, and more recently have reached Europe. Hot, dry conditions, intensified by climate change, have been worsening the situation, and are expected to help fuel the fires over the coming days.
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