Apart from fog in the morning, we can expect sunny and still very mild weather at the start of the week. From the middle of the week, the weather will become more dynamic. It will be wet at times in the north and persistently wet on the southern side of the Alps from later on Thursday. A major drop in temperatures is not (yet) expected this week.
Friendly start to the week
The new week will begin with widespread fog in the Swiss Plateau, with the upper limit mostly between 500 and 600 meters, and high fog-like clouds in northwestern Switzerland. As the day progresses, the gray will clear up well for the most part, but you will need more patience on the northern edge. The sun will be able to make its presence felt more and more and will only share the sky with high cloud fields. Temperatures will reach highs of 10 to 12 degrees, accompanied by a light south-westerly wind. On the southern side of the Alps, the sun will continue to dominate today after a sunny and warm weekend. The northerly foehn will gradually weaken during the day, but temperatures will still be close to 20 degrees in isolated areas today.
Fig. 1: High fog-like clouds in Les Ordons at a good 1000 meters; Source: Roundshot
Tomorrow will be similar to the start of the week. Once again, we will start with widespread fog below 600 meters, along the northern edge the upper limit will be slightly higher at a good 900 meters. The chances of clearing during the day are good again. Apart from that, it will be sunny with high clouds. Temperatures will rise into the double digits. At high altitudes, it will be extremely mild today and tomorrow. A good 5 to 6 degrees will be measured at 2000 meters, the zero degree limit is between 2500 and 2800 meters, in the west and south even a little higher. The wind up there will be strong to gale-force from westerly directions, especially on Tuesday.
Transition day on Wednesday
The third day of the week will also begin with some fog, but also a few sunny spells. As the day progresses, the amount of cloud will gradually increase and rain is expected in western and north-western Switzerland from the evening onwards. These showers will spread to the Swiss Plateau during the following night. The snow line along the foothills of the Alps will be between 1300 and 1500 meters. Before that, highs of between 10 and 12 degrees will be reached again during the day with briskly freshening south-westerly to westerly winds.
A mixed second half of the week
The dirty Thursday initially presents itself from the mostly cloudy and wet side. Rain protection or an umbrella should be a useful utensil for the carnival start in Lucerne with the big bang at 5 am. The snow line will rise slightly to between 1700 and 1900 meters, although lower flakes may be seen depending on the valley. As the day progresses, the clouds will slowly clear and there will be a mix of sunny spells and clouds, with increasingly dry conditions.
Fig. 2: Thursday marks the start of the "fifth" season for many; Source: Pixabay
Rain on the southern side of the Alps
In the run-up to a low pressure system moving from the British Isles to the North Sea on Friday, the air pressure on the northern side of the Alps will drop. A southerly foehn situation will increasingly develop, with precipitation gradually setting in in Ticino during the night to Friday. In the north, the day will be variably cloudy but mostly dry. In the central and eastern foothills of the Alps, the southerly foehn will provide some clearing. With temperatures of 12 to 14 degrees, it will be extremely mild, and in the foehn valleys, the "20s" are not out of the question.
The picture will be different on the southern side of the Alps, where it will often be wet under very cloudy skies, with large amounts of precipitation falling in some places. The precipitation in the south will continue over the weekend and the weather will only slowly calm down over the course of Sunday. Depending on the weather model, 80 to 120 mm of rain can be expected across the region, with much heavier amounts falling locally in Vallemaggia, Centovalli and parts of Leventina. With temperatures of 7 to 9 degrees, the snow line on the southern slopes of the Alps will be around 1,200 to 1,500 meters, with high intensities and narrow valleys sometimes even lower (precipitation cooling).
On the northern side of the Alps, the weekend will present a mixed picture. Clouds will be the dominant weather element. However, the fohn will ensure dry conditions for a long time, especially in the east. From today's perspective, it only seems to get wet here briefly during the course of Sunday. In northwestern Switzerland and the western half of the country, it will be wetter more frequently. The snow line will be in the range of 1200 to 1500 meters.
Fig. 3: Precipitation amounts between Thursday and Sunday; Source: MeteoNews/UBIMET
Much cooler next week
According to the majority of weather models, noticeably cooler air masses will reach us at the beginning of next week and in the days that follow. In the process, moisture is also likely to reach the Alpine region in batches. However, it is still too early for more detailed statements and an assessment of the snow line. We will keep you up to date at all times on our website.
Fig. 4: Outlook for the next few days; Source: MeteoNews
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