Overview

• Switzerland temporarily shut the Susten, Gotthard, Grimsel and Nufenen passes, with queues of about 10 km at the Gotthard north portal and 8 km on the south side and waits near two hours.
• Western Italian Alps saw the snowline fall to roughly 1,500–1,600 meters for the first time in September since 1993, with local totals reported at 37 cm in Gran Paradiso and around 25 cm at the Serrù reservoir, linked to cold air from ‘Alessio’.
• Meteorologists in Austria caution that parts of the Alps could see further heavy snowfall of up to about 50 cm, prompting warnings for hikers and mountain users above 2,000 meters.
• Germany’s weather service signals a marked cooldown this week with widespread ground-frost risk, locally down to around minus 3 degrees, and notes challenging fog and low-cloud forecasts under high pressure.
• Forecast models are watching ex-hurricane Humberto for a potential short warm spell after the cold phase, with any rebound dependent on the storm’s eventual track.