Unprecedented Summertime Storm Unleashes Hurricane-Strength Winds and Devastation in Western Europe

An extremely unusual summertime storm is wreaking havoc in Western Europe, bringing hurricane-strength winds and causing widespread damage and disruption. The storm, named Poly by the German Weather Service, is more reminiscent of a high-end winter storm and is even producing a destructive “sting jet,” which is mixing jet stream winds to the ground.

According to the Associated Press, the storm has already claimed at least two lives and caused significant damage in the Netherlands and Germany. In Amsterdam, dozens of trees were toppled, cars and houseboats were damaged, and several people were injured. This storm is the most severe on record to hit the Netherlands during the summer months and the strongest overall since 2018, according to weather agency Weeronline.

The German Weather Service has issued red warnings for “extreme weather,” the highest on their scale. They are forecasting “hurricane gusts” with winds gusting between 65 and 80 mph. The service has warned of widespread severe damage to buildings, uprooted trees, and falling roof tiles, branches, and objects. They have advised people to close all windows and doors, secure items outdoors, and keep a distance from buildings, trees, scaffolding, and high-voltage power lines.

In the Netherlands, conditions are slowly improving as winds settle back into the 40 to 55 mph range. Earlier code orange alerts have been downgraded to code yellow alerts by the Royal Netherlands Meteorological Institute.

The storm has also caused significant disruptions in transportation. Hundreds of flights have been canceled or delayed at Amsterdam Airport Schiphol, one of Europe’s busiest airports. Trains in the northern Netherlands have also been halted.

So, what caused this powerful storm? Poly is a strong low-pressure system that evolved from a broad trough in the jet stream. A pocket of high altitude frigid air, low pressure, and spin intensified a surface low over the English Channel, which then moved into Belgium, Germany, and the Netherlands. The presence of fully-leafed trees likely contributed to the damage observed.

One interesting aspect of this storm is the possible presence of a “sting jet.” Sting jets are narrow corridors of intense wind that form on the “wraparound” portion of rapidly intensifying low-pressure systems. In the case of Poly, it is likely that the jet stream swept moisture-laden air into the low-pressure system, causing the surrounding air to cool and descend rapidly, bringing jet stream winds with it. Sting jets can lead to gusts of 80 to 100 mph or even higher.

These types of storms and sting jets have been observed in the past, particularly during the Great Storm of 1987, which caused significant damage and loss of life in Western Europe. The existence of sting jets was postulated following that storm and has since been observed dozens of times.

As the storm continues to move towards Denmark and Sweden, authorities are urging people to stay safe, avoid going outside if possible, and take precautions to protect themselves and their property.

What are the potential reasons behind the rarity and intensity of this summer storm, including the development of a “sting jet

M trees and buildings.

The storm has also caused disruption to travel and transportation. Flights have been canceled, trains have been delayed or suspended, and several major highways have been closed due to fallen trees and debris. Ferry services between the UK and mainland Europe have also been affected, with some sailings canceled or delayed.

Meteorologists are stunned by the intensity of this summer storm, as it is highly unusual for this time of year. Such storms are more commonly seen during the winter months when the jet stream is typically stronger and the contrast between warm and cold air masses is greater. The development of a “sting jet” is especially rare, as it requires a complex combination of atmospheric conditions.

Poly is expected to continue its path across Western Europe, causing further damage and disruption in Belgium, Luxembourg, and France. Authorities in these countries have also issued warnings and advises for citizens to take precautions.

The occurrence of an extreme summer storm like Poly highlights the increasing unpredictability and severity of weather events in recent years. Climate change is believed to be a contributing factor, as it can enhance the intensity of storms and extreme weather events.

As the storm continues its rampage, emergency services, power companies, and local authorities are working round the clock to respond to emergencies, clear debris, and restore services. It serves as a stark reminder of the power of nature and the importance of preparedness in the face of such events.