This week, the weather will be split into two parts: Today, Monday, and tomorrow, Tuesday, it will be often cloudy and partly wet with temperatures not too high at mostly 12 to 16 degrees. After Wednesday as a transition day, it will be quite sunny over the extended Ascension weekend with only a slightly increased tendency to showers and thunderstorms in some areas on Sunday afternoon. Temperatures will reach a warm 20 degrees or more from Ascension Day. This means that there is little in the way of excursions over the Ascension weekend.
Transition day today Wednesday
After a rainy Tuesday in many places (see below for precipitation totals), the weather will gradually calm down from today. Depending on the region, Wednesday will start with varying degrees of cloudiness. In the western midlands and in north-western Switzerland, it will be quite sunny in places, while clouds will dominate from the Bernese Oberland to central and eastern Switzerland, with some rain or snow falling from around 2000 meters. A similar distribution of clouds will continue throughout the day today, with occasional showers possible in the relatively unstable stratification, even on the Central Plateau. With a light breeze, even moderate in western Switzerland, highs will rise to 14 to 18 degrees depending on the sun and region.
Fig. 1: Precipitation totals from Tuesday; Source: MeteoNews/UBIMET
Increasingly sunny with High Thomas
High Thomas over the North Sea will cause the air masses to become increasingly dry in the coming days. Ascension Day will begin with some residual moisture, which will manifest itself in the form of low, partly foggy clouds. As the day progresses, there will be an increasingly friendly mix of sunshine and low overcast. Highs in the afternoon will be between 18 and 20 degrees, with even warmer and somewhat sunnier temperatures of up to 24 degrees in Ticino.
Fig. 2: Pressure distribution over Europe on Friday afternoon with High Thomas over the North Sea; Source: MeteoNews/UBIMET
Ascension bridge pays off weather-wise
From Friday to Sunday, the weather will generally be warm and sunny. Spring clouds will form during the day, especially in the foothills of the Alps and over the mountains. These will remain harmless on Friday and Saturday, but on Sunday the lability in the atmosphere will increase, favoring the formation of showers and thunderstorms. Temperatures will reach highs of between 22 and 24 degrees, and in places it will be enough for a summer's day with 25 degrees or slightly more (e.g. Basel, Geneva or Sion). It will also be extremely mild at high altitudes, with the zero degree limit varying between 3100 and 3400 meters on these days. On the southern side of the Alps it is similarly temperate, but the degree of cloudiness is likely to be a little more pronounced than in the north.
At the beginning of the coming week, the weather is likely to be somewhat unsettled. However, with occasional showers or thunderstorms, it will continue to be at least very mild to warm.
Fig. 3: Outlook until Tuesday; Source: MeteoNews
Often cloudy and partly wet start to the week
The new week began cloudy in most of the country under the influence of a low pressure system over the English Channel, with frequent and sometimes heavy rain, especially in the west and south, with snow only falling from 2000 meters and a little higher. In the east, the day began dry with clear spells. The cloud cover closed in the morning, but it will also get wet here around lunchtime. In northern and central Grisons and in the Lower Engadine, at most little precipitation is expected, and in some areas it could remain completely dry. Temperatures will reach around 15 to 16 degrees in the east, 14 degrees in the west and around 17 degrees in the south. It will be mildest in the Rhine Valley at 18 to 19 degrees (see Fig. 1).
Fig. 1: Weather today Monday; Source: MeteoNews
Tuesday often wet, especially in the west and south
Tomorrow, Tuesday, will continue to bring a lot of clouds and rain, mainly in the west and south, or snow from around 1700 to 2200 meters, as a high-altitude low moves from France to the Mediterranean. Very little precipitation is likely to fall in the north-east around Lake Constance. Temperatures will rise to around 12 to 14 degrees in the north and 16 degrees in the south.
Wednesday Clouds, some sun and showers
On Wednesday, slightly rising air pressure will bring changeable weather with sunny spells, particularly in the west and south, but also a few showers, especially in the foothills of the Alps. Temperatures will be slightly higher, reaching around 15 to 18 degrees in the north and around 20 degrees in the south.
Ascension quite sunny and warm until Saturday
From Ascension Day until Saturday, a high in the British Isles/North Sea area (see Fig. 2) will dominate our weather with plenty of sunshine and pleasant temperatures of 20 degrees to just under 25 degrees. There will also be a light to moderate breeze on Ascension Day. The cumulus clouds that form during the day, especially over the Jura and the foothills of the Alps, will remain largely harmless, with only isolated showers or thunderstorms possible in the south and along the foothills of the Alps on Saturday afternoon. This means that nothing stands in the way of Ascension Day excursions in terms of the weather, although it should be noted that there is still quite a lot of snow in the Alps above around 2000 meters, especially in shady locations. In terms of the weather, it is not necessary to travel to the south, as the weather here is very similar to that in the north.
Fig. 2: Over the extended Ascension weekend, a high in the British Isles/North Sea area will bring us plenty of sunshine; Source: MeteoNews, UBIMET
Sunday partly sunny, local showers or thunderstorms
On Sunday, it will remain over 20 degrees and at least partly sunny, but with a fairly flat air pressure distribution, the tendency to showers and thunderstorms will be somewhat higher, especially in the afternoon and in the Jura, the foothills of the Alps and the south.
Finally, an overview of the weather and temperature development from tomorrow Tuesday to next Sunday (see Fig. 3).
Fig. 3: Weather forecast from tomorrow Tuesday to Sunday; Source: MeteoNews
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