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WEATHER

Indian summer settles over Swiss cantons

Temperatures hit record highs for November in Swiss mountain regions on Sunday as Switzerland experienced spring-like conditions that are forecast to continue for several days.

Published: 8 November 2015 22:11 CET
Indian summer settles over Swiss cantons
Autumn colours on path alongside Lake Geneva in Montreux (canton of Vaud). Photo: Malcolm Curtis/The Local

The mercury rose to more than 21C in Chur in the canton of Graubünden and Binningen in the canton of Basel-Country, the warmest places in the country.

Records were set in La Chaux-de-Fonds in the canton of Neuchâtel (20.4C), Crans-Montana in the canton of Valais (19C), Samedan in the canton of Graubünden (17.7C), Chasseral in the canton of Bern (16.9C) and Mount Pilatus straddling the cantons of Lucerne and Obwalden (15.7C).

“Today is a day of absolute records,” Roger Perret of MeteoNews told the ATS news agaency.

The mild weather is exceptional in Switzerland for this time of year, he said.

The cause of the warmer than usual conditions was a large high pressures system centred over Europe.

Perret said the situation had nothing to do with climate change.

“It’s a meteorological situation completely special,” he said.

“Next year could be totally different.”


MeteoSwiss, the national weather office, forecast slightly cooler weather for Monday and Tuesday but with warmer than average temperatures.

The thermometer should rise to 19 degrees in Sion (Valais), Lugano (Ticino) and Chur on Monday, the office said. 

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WEATHER

Why are there so many weather-related disasters in Switzerland this summer?

From mudslides to flooded hiking trails, several Swiss regions have suffered serious weather-related damage during this year’s summer season.

Published: 14 August 2024 13:40 CEST
Why are there so many weather-related disasters in Switzerland this summer?

In the past weeks, frequent spells of extreme weather claimed lives and caused considerable material damage in several regions of the country.

Among them:

In June, parts of Switzerland, including the canton of Graubünden and the resort of Zermatt in Valais, were hit by huge floods, which claimed the lives of three people and left buildings and roads destroyed.

They were triggered by a violent thunderstorm that unleashed the rivers, causing a rock and mud avalanche in the municipality of Misox.

Additionally, landslide of mud and rubble destroyed a part of the north-south axis of the A13 motorway.

Areas of Valais and Ticino were also among those badly damaged by storms, with three people dead and five missing in the latter canton; the upper Val Maggia remained cut off from the rest of the country and without water and electricity for days.

And just this week, two people were injured in a massive storm in Brienz (canton Bern) and 70 others had to be evacuated from their homes, after the Milibach river overflowed after heavy rains, carrying stones, boulders and wood, which caused a water collector above the village to flow uncontrollably.

Buildings, parked vehicles, roads and public transport infrastructure were damaged.

Also, more than 620 trails –1,300 km in total – had to be closed to hikers due to heavy rains and flooding that hit some regions of the country at the end of June. 

READ ALSO: Hikers in Switzerland warned as hundreds of trails close

Why has this been happening?

“The summer of 2024 has been marked by particularly bad weather,” said meteorologist Felix Blumer. “There is one or two damaging thunderstorms every summer, but this year, there have been lot of them.”

There is a scientific explanation for this phenomenon: according to Blumer, most of the summer so far, the weather in Switzerland has been dominated by low pressure areas.

“It is precisely the low pressure situations that are important, with the summer solar radiation, the ground heats up very strongly. The warm, light air can rise, cool down, condense – resulting in showers and thunderstorms.”

In a simple(r) language, low pressure gives way to warm air and rainstorms, which explains the high number of strong and destructive thunderstorms.

Is the weather this summer really more ‘extreme’ than in the past?

According to Thomas Schlegel from Switzerland’s official weather service MeteoSwiss, “due to the extreme events that have occurred so far, 2024 will certainly go down in history as a year with a lot of bad weather and damage.”

He also cited “exceptional” lightning activity during the thunderstorms: over 70,000 lightning strikes were recorded — more than during a typical summer.

In fact, two people who were working in a field in Fribourg during one such lightning episode in July, were struck and injured, along with a police officer and a REGA pilot who came to their rescue. 

What’s ahead, weather-wise?

MeteoSwiss’ eight-day weather forecast predicts more rain and thunderstorms, ranging in severity, in various Swiss regions. 

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