After today's friendly and at least partly sunny Thursday under the influence of an intermediate high pressure system following the dissipation of fog, clouds will dominate in the north until Monday and the sun will struggle. There will be downpours, especially on Saturday night, and rain in the course of Monday. After that, a ridge of high pressure in the middle of the week will provide stabilization, albeit probably only temporarily.
Today Thursday after fog partly sunny and mild
After fog lifts in many places around lunchtime, we expect friendly and at least partly sunny weather throughout Switzerland today Thursday in the area of influence of an intermediate high, despite medium-high and high cloud fields. With a weak south-westerly wind in the afternoon, it will be spring-like mild at around 15 to 18 degrees, with a zero degree limit at around 2700 meters (see Fig. 1).
Fig. 1: Weather today Thursday; Source: MeteoNews
Friday/Saturday changeable with showers
Tomorrow (Friday) and the day after tomorrow (Saturday), more humid air will flow back in from the southern edge of a low moving from Great Britain to the Baltic Sea in the north, so that it will be changeable and, in addition to some sunshine, there will also be frequent showers, especially on Saturday night. The upper-level current will turn to the northwest on Saturday, so that the focus will be along the Alps. The snow line will be just under 2000 meters on Friday and then slightly lower at around 1300 to 1600 meters on Saturday. With a weak to moderate south-westerly to westerly wind, temperatures will reach a mild 16 degrees on Friday and a slightly less mild 12 to 13 degrees on Saturday with a moderate westerly wind.
In the south, there will be a dry mix of sun and cloud on Friday with a maximum of around 16 degrees. On Saturday, sunny weather will set in after fields of cloud as a northerly foehn wind blows in during the day. Locally, the 20 degree mark could well be broken for the first time this March (previous record in Biasca with 19.3 degrees).
Sunday Fog, some sun and clouds
On Sunday, there will initially be some fog, which will largely clear by midday. Otherwise it will be partly sunny in the east at first, then during the day dense medium and high clouds will move in from the west, but it should remain largely dry. Temperatures will rise to around 15 degrees.
In the south, we expect sunny spells alongside high and mid-level clouds with a maximum temperature of around 16 degrees. However, the number of hours of sunshine is modeled very differently in the various weather models and is therefore unclear.
Monday Air mass boundary, probably partly wet
On Monday, a small low pressure system is expected to move just north of us from west to east and will determine the weather at an air mass boundary in the north with lots of clouds. However, it is still unclear how active the air mass boundary will be and how much precipitation there will be. It is likely to be wet at times, especially in the second half of the day and on Tuesday night. The exact temperature level is also unclear, with maximums between around 12 and 14 degrees being the most likely.
The south should remain dry and there should be some sunshine as well as lots of clouds.
Tuesday probably changeable, Wednesday quite sunny
From Tuesday onwards, the weather development is still uncertain. It is most likely to be changeable on Tuesday with showers, especially along the Alps. On Wednesday, a ridge of high pressure, apart from some fog in the lowlands, should ensure fairly sunny and mild spring-like weather despite increasingly dense high clouds from the west.
In the south, it should be quite sunny and very mild on Tuesday, with thicker high fog-like clouds possible on Wednesday with slightly lower temperatures.
Finally, an overview of the weather and temperatures from tomorrow Friday until the middle of next week (see Fig. 2).
Fig. 2: Outlook from tomorrow Friday to Wednesday; Source: MeteoNews
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